SonicStudio 5 TimeTwist/Pitch Shift (SS-806)
Contents
1. en SONIC SOLUTIONS SonicStudio 5 TimeTwist Pitch Shift SS 806 1996 Sonic Solutions All rights reserved SonicStudio 5 Time Twist Pitch Shift SS 806 This manual as well as the software described in it is furnished under license and may only be used or copied in accordance with the terms of such license The information in this manual is furnished for informational use only is subject to change without notice and should not be construed as a commitment by Sonic Solutions Sonic Solutions assumes no responsibility or liability for any errors or inaccuracies that may appear in this book Except as permitted by such license no part of this publication may be reproduced stored in a retrieval system or transmitted in any form or by any means electronic mechanical recording or otherwise without the prior written permission of Sonic Solutions SONIC SOLUTIONS INC SONIC MAKES NO WARRANTIES EXPRESS OR IMPLIED INCLUDING WITHOUT LIMITATION THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE REGARDING THE APPLE SOFTWARE SONIC DOES NOT WARRANT GUARANTEE OR MAKE ANY REPRESENTATIONS REGARDING THE USE OR THE RESULTS OF THE USE OF THE SONIC SOFTWARE IN TERMS OF ITS CORRECTNESS ACCURACY RELIABILITY CURRENTNESS OR OTHERWISE THE ENTIRE RISK AS TO THE RESULTS AND PERFORMANCE OF THE SONIC SOFTWARE IS ASSUMED BY YOU THE EXCLUSION OF IMPLIED WARRANTIES IS NOT PERMITTED BY SOME STATES TH2. the system must be equipped with one of the following One SS 800 or SS 801 Sonic FX Processor or One NN 102 or NN 107 Sonic NoNOISE Processor Card These are functionally equivalent each being a version of the SSP 3 card that is used as a building block throughout SonicStudio Either version of the board can be used for NoNOISE or TimeTwist as well as for other non real time signal processing functions Note Installation procedures for Sonic System hardware are described in the SonicStudio manual titled Installation and Maintenance Installing the Sonic FX Processor Normally the processing board is connected with the main system board in the SCSI Slave configuration with the SCSI connector of each board joined by a common ribbon cable Below is a view of the FX processor installed with the main SSP 3 board seen from above with the computer lying on its side SonicStudio Version 5 Hardware SSP 3 SCSI Slave SSP 3 Main System Board 1 0 Connector Bard Macintosh Rear Panel N Remove SCSI Terminator from SSP 3 Main System Board a b c NuBus slots The SCSI connector of the main board is connected to that of the FX board using a special 3 headed ribbon cable The two boards are also joined by means of the board to board cables These ribbon cables are connected in a criss cross configuration with the connector on one board
3. 1 6 1 04 1 8 1 05 2 1 06 2 2 1 07 2 4 1 08 2 6 1 09 2 8 1 1 3 16 SonicStudio Version 5 TimeTwist Process Limitations Time Twist is an active process that makes decisions as it goes concerning optimum placement of splices Because of this sometimes the actual length of the output is longer than that specified When this occurs it is an indication that the system was unable to find enough strategically placed splices that met the criteria for Quality defined in the Launch Twist dialog box If this happens reduce the setting of the Quality parameter and relaunch processing Editing with Background TimeTwist If an FX Processor board is installed in the system TimeTwist may be invoked by using the five edit like commands in the TimeTwist pull right menu _ T T Specifications Insert with T T w CROSS FADE TimeTwist T T w BLACK FADE T T w CROSS FADE IN BLACK FADE OUT amp Ripple w CROSS FADE amp Ripple w BLACK FADE Insert amp Ripple with TimeTwist These are variations on two basic commands T T and T T amp Ripple These commands resemble the regular Insert commands in form but they differ in the way that they affect the placement of audio in the Destination panel s SonicStudio Version 5 17 Time Twist Pitch Shift The figure above represents a Source and a Destination panel with Sound Elements which are marked and ready for Time Twist editing The In a
4. 3 Start Time field 6 starting TimeTwist 6 stereo 7 stereo mate field 7 stereo and TimeTwist 20 summary 25 synchronization and multi ple channels 20 T T T Specifications listed 17 T T Specifications command 6 termination 3 time compression 6 TimeTwist processing param eters 11 TimeTwist overview 1 Twist Ratio dialog box illus trated 9 SonicStudio 5 User Manual 1 4 SonicStudio 5
5. and lots of splices in those good areas The result will be that it will tend to put all the splices in the vowels and leave the consonants alone In the extreme Quality of 95 say this gives the speaker a rather odd prosody that is somewhat reminiscent of a Maine or Maritime accent but the sound is quite clean Similarly the Max Silence parameter can be set very high 3 0 is the limit so the quiet regions between the words will be stretched or squeezed by large amounts This has the effect of putting much of the stretch squeeze in the air between utterance See the table below for a range of usable high values Music For music set the Quality parameter low at least below 0 1 0 05 is recommended and set the Max Per Frame parameter to be 0 1 more or less than the ratio This gives the system the freedom to place the splices anywhere in the frame but will constrain it not to work too hard on any one frame The Max Silence parameter should be set the same as the Max Per Frame parameter The following table may help in determining ideal settings for TimeTwist functions It represents the high range of Max Per Frame or Second settings for given ratios SonicStudio Version 5 15 Time Twist Pitch Shift Ratio Max Per Frame Seconds 0 9 0 5 0 91 0 55 0 92 0 6 0 93 0 65 0 94 0 7 0 95 0 75 0 96 0 8 0 97 0 85 0 98 0 9 0 99 0 95 1 1 1 01 1 2 1 02 1 4 1 03
6. be viewed as a factor by which the length of the original Sound File is to be multiplied to get the length of the new file Thus values that are less than one correspond to time compression while values greater than one result in time expansion The default value is one exactly so you will almost certainly need to enter a value before launching processing TimeTwist can alter the length of a source segment by roughly a factor of two in either direction Thus legal values for Ratio are from 0 50 to 1 50 Note that processing becomes more problematic at either extreme 8 SonicStudio Version 5 TimeTwist Note The parameter values fields in the Time Twist dialog box do not support type over of the numeric values To enter a new parameter value in any field in the Time Twist dialog box first delete the digits that are to be replaced To specify time modification in a form other than a straight ratio you can open a larger dialog box To enter TimeTwist ratio in another form 1 Click the words More Choices in the TimeTwist dialog box This expands the Launch Twist dialog box to express the ratio of time modification in several forms Twist Ratio O Length Change 0 0000 50 000 to 50 000 O Semitones 0 000 12 000 to 7 000 Time From 00 00 30 0098 To _00 00 30 00 P O Beats From 60 0000 To 60 0000 Cie C Besides conversion by time ratio
7. bridging to the opposite connector on the other board Termination Each SSP 3 card is delivered with a SCSI terminator on the board The terminator similar in appearance to a DIP IC is mounted in a socket located directly underneath the SCSI connector along the top of the circuit board One terminator must be at the end of a SCSI chain Before installing the terminator must be removed from one of the cards In the configuration shown above the terminator is removed from the main SSP 3 SonicStudio Version 5 Time Twist Pitch Shift Invoking TimeTwist and Pitch Shift If the Time Twist Pitch Shift option is installed in the system software two additional commands appear in the DSP menu Selecting Time Twist or Pitch Shift brings up a submenu with several items Do Frequency Analysis Reverse Sound File gt gt Pitch Shift Time Twist 2 T T Specifications Reverberation T w CROSS FADE Bkg Sample Rate Conversion T w BLACK FADE w CROSS FADE IN BLACK FADE OUT amp Ripple w CROSS FADE amp Ripple w BLACK FADE DSP Do Frequency Analysis Reverse Sound File gt Pitch Shift gt Specifications Time Twist b S w CROSS FADE Reverberation S w BLACK FADE Bkg Sample Rate Conversion S w CROSS FADE IN BLACK FADE OUT amp Ripple w CROSS FADE amp Ripple w BLACK FADE If a NoNOISE FX coprocessor card is installed all commands in the menu will be active If ther
8. of a stereo group Mono or stereo TimeTwist is available with or without an FX coprocessor The difference is the required length of time for processing When you select a file the end time of the file is automatically entered in the End Time field If you wish to process only a section of the file enter time values in the Start Time and End Time fields Start Time 00 00 00 00 o Delete End Time 00 00 30 00 WN Input SonicStudio Version 5 7 Time Twist Pitch Shift A Delete Input checkbox exists to automatically delete the input sound file s at the finish of processing Do not select this box unless you are certain that you want to delete the source file Remember that the results of Time Twist are somewhat variable If the source file is deleted you cannot recover if the output is not exactly as desired Specifying the Output File Before processing can begin you must also specify the file name for the output sound file Click next to the words Output Sound File to bring up a file select dialog box in which you can designate the name and storage location for the file to be created Specifying Ratio and Processing Parameters The most important parameter of processing of course is the amount of time compression or expansion to be applied to the source audio This is expressed as a ratio of the length of the original audio to the length of the output Sound File Ratio 1 0000000 lt More Choices gt The ratio may
9. resulting edits since inaccuracies in the twist will cause them to be off by a bit If the Quality parameter is set at zero the effect of the misalignment of the edits will be minimized though not eliminated TimeTwist Application Notes There are many potential applications for TimeTwist Some of the situations for its use can become somewhat complex The following notes may help you understand how to apply this powerful tool Processing Multiple Channels Time twist normally works on either a mono or a stereo source For a stereo source the splice points are selected based on the mono sum of the two channels and the splices are performed in exactly the same places on left and right to help preserve the stereo imaging This gives very different results from those obtained if the left and right channels are processed separately since the splices in left and right will not be forced to be in the same places There can even be a different number of splices in left versus right This has further implications Time Twist cannot meaningfully be applied to a multi channel recording beyond a simple stereo pair That is it makes no sense to try to twist say an 8 track classical recording since it will be done as four stereo pairs and each pair will lose synchronization with each other pair If however the eight tracks in question consist of slugs of applause ambience and sound effects then the small shift in relative synchronizat
10. the change in rate may be expressed in terms of A percentage speed change e Pitch transposition in musical semitones Change in sample rate Change from original play time to new time SonicStudio Version 5 9 Time Twist Pitch Shift Change from original to new tempo expressed as beats per minute Values may be entered in any of these forms Note that altering by pitch transposition does not actually affect pitch A change in this value shifts the other settings accordingly but frequency will not be affected once launched Launching Once the parameters of processing have been set click the Launch button to start the process If an FX board is installed in the system the Time Twist process will be placed in the Background Queue and will proceed to completion during which time you are free to engage in other work including launching additional TimeTwist processes if desired The progress of execution may be followed by opening the Background Queue Manager dialog box found in the Managers sub menu of the File menu Background Queue Manager ABORT status disabled Status T T 1 00 Recordings TakeO001 Source tt 1 Status Prep SSP for T5 5 Status lt disabled gt Status lt disabled gt T T 1 00 Recordings Take0001 Source t1 1 T T 1 00 Recordings Take0001 Source tt 2 Status Pro
11. E ABOVE EXCLUSION MAY NOT APPLY TO YOU IN NO EVENT WILL SONIC ITS DIRECTORS OFFICERS EMPLOYEES OR AGENTS BY LIABLE TO YOU FOR ANY CONSEQUENTIAL INCIDENTAL OR INDIRECT DAMAGES INCLUDING DAMAGES FOR LOSS OF BUSINESS PROFITS BUSINESS INTERRUPTION LOSS OF BUSINESS INFORMATION AND THE LIKE ARISING OUT OF THE USE OR INABILITY TO USE THE APPLE SOFTWARE EVEN IF SONIC HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES BECAUSE SOME STATES DO NOT ALLOW THE EXCLUSION OR LIMITATION OF LIABILITY FOR CONSEQUENTIAL OR INCIDENTAL DAMAGES THE ABOVE LIMITATIONS MAY NOT APPLY TO YOU Sonic Sonic Solutions SonicStudio the Sonic logo Audio 2000 Sonic DVD Creator DVD Production Alliance DVD Ready DVD Toolmakers Guild High Density Audio TimeTwist Varispeed MediaNet and SonicOMF are trademarks of Sonic Solutions NoNOISE is a registered trademark of Sonic Solutions Dolby Digital is a trademark of Dolby Laboratories Inc QuicKeys is a registered trademark of CE Software Inc JL Cooper is a registered trademark of J L Cooper Electronics Inc Apple the Apple logo Finder Macintosh Quadra and Quicktime are registered trademarks of Apple Computer Inc Acrobat is a trademark of Adobe Systems Inc NuBus is a trademark of Texas Instruments All other company or product names are either trademarks or registered trademarks of their respective owners Written and designed at Sonic Solutions 101 Rowland Blvd Novato CA 94945 USA Print
12. ar indicator will appear in the Destination panel s where the audio is inserted As processing proceeds this bar is progressively replaced by audio waveform There is no need to wait for completion of processing on one segment before performing another Time Twist edit The system will automatically queue as many processes as are required Defaulting of the Parameters Launching a TimeTwist editing command does not pop up the dialog box The parameters of processing are derived by the system from the length of the Source segment and the length of the Destination segment The Ratio is set to the time between the Out and In points in the Destination panels over the time between Out and In points in the Source panels This ratio must be between 0 5 and 1 5 for these commands Max Per Frame and Max Silence parameters are coerced to the value of the Ratio plus or minus 0 1 Quality and the Silence Thresh parameters come from the default settings for Time Twist They can be set from the Time Twist dialog box using the Save as Default button Processing an Edited Sequence of Segments The Source panels may contain a single segment or an entire edited sequence of segments In this case each segment will be twisted separately and then automatically edited back together in the Destination panels SonicStudio Version 5 19 Time Twist Pitch Shift Since Time Twist is not an exact process it may be necessary to go back and adjust the
13. at indicates the relative seamlessness of each possible splice SonicStudio Version 5 11 Time Twist Pitch Shift In the second stage of processing the system examines the source file in blocks of 16K 16 384 samples a Time Twist frame corresponding to a little under a third of a second at a sample rate of 48 KHz In each frame the system determines whether one or more splices are needed to maintain the specified ratio of compression or expansion If splicing is called for in a given frame the system examines the candidate splices from the list prepared during the first processing stage and determines whether a qualified candidate is available If it is the splice or splices are performed and the system proceeds to the next frame If there is no qualified splice available the system moves to the next frame but accumulates a deficit that must be made up somewhere later in the file The processing parameters determine the criteria that are used to decide whether a given splice is acceptable Quality The primary criterion in determining the acceptability of a splice is its quality rating which is a numeric value between O and 1 The Quality parameter tells the system how good a splice point has to be before it will be accepted The higher the value specified the better a splice must be to be accepted The system will absolutely not do a splice if the quality value that the processing determines for the splice is belo
14. ated 22 pitch shift option 4 Pitch Shift Ratio dialog box illustrated 24 Pitch Shift editing with back ground 24 process limitations 17 processing an edited se quence of segments 25 processing in place 21 processing multiple channels 20 processing parameters 11 23 processing specifying param eters 8 Q Quality parameter and dialog 15 Quality parameter and music 15 Quality parameter in Pitch Shift 23 Quality parameter reducing values 17 Quality parameter setting 12 Quality parameter settings and distortion 13 Quality parameter using 14 quality parameters 23 Quality rating reading 13 SonicStudio 5 R ratio parameter 23 Ratio parameter setting 12 ratio setting in Pitch Shift il lustrated 25 ratio specifying parameters 8 ratios listed 16 recommended settings 14 replacing dialog 21 Ripple command 17 rippling in pitch shift 24 rubato 14 S Save As Default button 19 SCSI connecting 2 segment length and Pitch Shift 24 segments processing edited sequence 25 settings recommended for parameters 14 Silence Thresh parameter il lustrated 14 Silence Threshold parameter 14 sound elements 18 sound file and ratios 8 Source panel illustrated 18 specifying processing param eters 8 specifying ratio parameters 8 specifying source files 6 specifying the output file 8 splice calculating 12 splices distributing 14 squeeze stretch 19 SSP 3 2 SSP 3 terminating
15. be concentrated in frames that are silent This can help to avoid audible artifacts with active audio but may have a noticeable effect on the pacing of spoken word material Silence Thresh Sections of silence in the source file are opportunities for processing The Silence Thresh parameter is a value in decibels that determines what will be recognized as silence If the average energy in a TimeTwist frame is below this number then the entire frame will be declared as silent Ina silent frame the Quality parameter does not apply The system will accept any splice point without regard to its Quality rating Recommended Settings In general there is a trade off between sound quality and rhythmic accuracy in TimeTwist operations If a high value is set for Quality 75 or greater there will be relatively few artifacts but the splices will be concentrated in only a few places If the Quality parameter is set to a low value such as 0 then there may be many artifacts depending on the material but splices will be spread more evenly throughout the sound While every situation will be different a couple of rules of thumb may be applied 14 SonicStudio Version 5 TimeTwist Dialog For dialog set the Quality parameter high 75 to 85 and set Max Per Frame parameter to its largest value 3 0 for stretch 0 5 for squeeze This will cause the system to perform splices in the good places but also allow it to do lots
16. cessing DeQueue PutAtTop Put at Bottom Wait on Next Step Hesame Processes During Load 10 SonicStudio Version 5 TimeTwist If no FX processor is installed the Background Queue Manager dialog box appears automatically and cannot be closed until the current process has completed Thus you can perform time squeeze stretch operations without an additional coprocessor board but in that case must wait for each job to complete before other work can proceed TimeTwist Processing Parameters Besides the ratio of compression expansion four parameters affect the results of TimeTwist processing as illustrated Man Per Frame TEE Silence Thresh Quality Max Silence 1 000 8 To understand how these parameters affect the results of processing it is helpful to understand something of the way that TimeTwist operates How TimeTwist Works TimeTwist uses a time domain approach to time compression in which bits of audio are either deleted compression or repeated expansion in order to squeeze or stretch audio to fit the defined time ratio The art of producing a good result consists of determining splice points that will provide the needed ratio with minimal audio artifacts In the first stage of processing SonicStudio analyzes the source Sound File From this analysis a list of possible splice points is prepared Each candidate splice is assigned a rating Quality th
17. e is no coprocessor only the first command TT or PS Specifications will be active There are two separate methods for applying the functions Launch Background T T Specifications T T w CROSS FADE T T w BLACK FADE T T w CROSS FADE IN BLACK FADE OUT amp Ripple w CROSS FADE amp Ripple w BLACK FADE Edit with Time Twist Pitch Shift 4 SonicStudio Version 5 Invoking TimeTwist and Pitch Shift Foreground Background Processing The first procedure is to specify a Sound File and a set of processing parameters using the T T or PS Specifications dialog boxes then to launch the processing This method may be used with or without an FX coprocessor card If the coprocessor is installed Time Twist or Pitch Shift will launch its process then return to the system You can then proceed with editing and other activities while Time Twist continues to work in the background If there is no coprocessor card the process will begin but you will be locked out from other actions until the function finishes processing the designated material Editing with TimeTwist Pitch Shift Alternatively Time Twist or Pitch Shift may be specified as part of an insert editing command similar to the standard editing commands Instead of selecting Insert or Insert amp Ripple you choose the equivalent command from the Time Twist or Pitch Shift submenus These T T and P S commands automatically process the
18. ed in the USA Sonic Part Number 820013B 12 96 Contents EA II u 2 Invoking TimeTwistand Pitch Shift 4 TOTS ba dd ota 6 PICS IE sc ia Acs 22 SUMMA ae 26 SonicStudio Version 5 TimeTwist Pitch Shift iv SonicStudio Version 5 TimeTwist Pitch Shift SS 806 TM Time Twist is a signal processing option for SonicStudio that changes the length of a mono or stereo Sound File without altering its pitch Pitch Shift changes the frequency of a Sound File without altering its duration TimeTwist and Pitch Shift can operate as background processing tasks or as foreground tasks that pre empt the system until completion The background mode of operation requires the addition of either an SS 800 or SS 801 FX Processor card or an NN 102 or NN 107 NoNOISE card Foreground operation does not require any additional hardware SonicStudio Version 5 1 Time Twist Pitch Shift Hardware TimeTwist may be used without adding any hardware to the basic Sonic system In this mode TimeTwist can proceed only in the foreground bringing a halt to any editing or other operations until the Time Twist process reaches completion By adding an additional signal processing card to the system TimeTwist processing may be moved into the background allowing you to proceed with editing recording and other processes on SonicStudio at the same time that audio is being processed To use TimeTwist in background mode
19. imeTwist 17 editing with Pitch Shift 5 editing with TimeTwist 5 End Time field 6 entering time values 7 expansion 11 expansion defined 8 F file deleting 8 file specifying the output 8 foreground processing 5 FX coprocessor card 5 H hardware 2 hardware connection dia gram 3 how TimeTwist works 11 SonicStudio 5 User Manual In point placing 5 inplace processing 21 inputting sound files 22 installing the Sonic PX pro cessor 2 invoking TimeTwist and Pitch Shift 4 L Launch button 10 Launch Twist dialog box 17 Launch Twist dialog box il lustrated 6 launching TimeTwist 6 10 limitations in processing 17 limits in processing 17 M Managers 10 Max Per Frame parameter 13 14 Max Per Frame parameter and dialog 15 Max Per Frame parameter and music 15 Max Per Frame parameter il lustrated 13 Max Per Frame listed 16 Max Silence parameter 14 15 Max Silence parameter illus trated 14 MOFS browser displaying 7 More Choices 9 More Choices to open a larger dialog 23 multiple channel processing 20 music and parameter settings 15 music and Quality setting 13 N NoNoise 2 4 O Out points placing 5 outputting sound files 22 P P S Specifications command 22 parameters defaults 19 parameters Pitch Shift pro cessing 23 parameters recommended settings 14 parameters TimeTwist pro cessing 11 Pitch Shift 1 Pitch Shift dialog box illus tr
20. ion may be acceptable In that case there is no stereo imaging involved 20 SonicStudio Version 5 TimeTwist Processing In Place There is no single command to select an area in the Destination panels and change its length without moving it but the same effect can be achieved with a multi step process 1 Copy the Destination panels to the Source panels This may be done by reversing the Source and Destination panels deleting all n and Out points and doing an Insert command to copy the panels over Then put the Source and Destination panels back the way they were The effect is that the same identical materials are found in the Source and the Destination panels 2 Identify the region to be twisted by placing In and Out points in the Source panels and an In point in the Destination panels at the identical time as that of the Source panel s In point 3 Place an Out point in the Destination panel at the location that the bracketed area in the Source panel will fill 4 Enter a T T w Crossfade command The In and Out points in the Source panel s will be twisted and edited into the Destination panels and the region after the bracketed area will be slid rippled to abut the twisted region Replacing Dialog TimeTwist can be useful in facilitating dialog replacement for example if you want to replace a blown line of dialog in an otherwise good take with a line from another take Performing TimeTwist on the replacemen
21. is ignored for ratios less than 1 Max Per Frame should normally be set to value about 0 05 greater than the expansion ratio For example if the ratio is set to 1 061 a musical half tone then set Max Per Frame to about 1 111 For particularly difficult cases Max Per Frame can be set to a higher value such as 1 5 This will cause the system to put all the expansion in just a few choice spots rather than spreading the expansion evenly over the duration of the sound However the rhythm of the sound may be adversely affected if too many splices are allowed in a single frame If a high ratio of expansion is selected with a relatively high setting for the Quality parameter as well as a high setting for the Max Per Frame parameter the system may be unable to find qualified splices in one section and then throw many splices in later in the piece SonicStudio Version 5 13 Time Twist Pitch Shift The result can be a pronounced rubato in which the sound speeds up and slows down If this is a problem reduce both parameters so that the splices are more evenly distributed Man Silence During silence the TimeTwist system automatically reduces the setting of the Quality parameter to zero while regulating the number of splices that can be incorporated in a single silent frame in order to prevent unnatural stretching or chopping of pauses If the Max Silence parameter is set higher than the Max Per Frame parameter splices will
22. ist dialog box The input and output of sound files is carried out in the same manner SonicStudio Version 5 Pitch Shift Ratio Quality and Processing Parameters The interval of the pitch shift is expressed as a ratio of frequencies Ratio 1 0000000 0 5 to 1 5 lt More Choices gt The ratio may be viewed as a factor by which the frequency of the original Sound File is to be multiplied to get the frequency of the new file The default value is 1 2 so you will almost certainly need to enter a value before launching processing Pitch Shift can alter the frequency of a source segment by roughly a factor of 2 in either direction Thus legal values for Ratio are from 0 50 to 1 50 As in TimeTwist settings at either extreme are least likely to be successful Note The parameter values fields in the Pitch Shift dialog box do not support type over of the numeric values To enter a new parameter value in any of the fields in the TimeTwist dialog box it is necessary to first delete the digits that are to be replaced Note that the Quality parameter in Pitch Shift functions precisely as it does in TimeTwist An unsuccessful Pitch Shift will result in a correctly altered pitch but an incorrect sound file length As in Launch Twist if you wish to specify frequency modification in a form other than a straight ratio you may open a larger dialog box by clicking on More Choices This expands the Pitch Shift dialog box
23. nd Out points in each panel define the Source audio segment and the length that it is required to fill in the final product Regions in each panel are designated s1 s2 d1 d2 etc to identify each section This section of the Destination The remainder of the section between the Panel is replaced In and Out Points slides to the Out Point In the figure above T T without Ripple replaces a section of audio in the Destination panel that matches the length of the original source segment Both the bare T T commands and T T with Ripple commands change the length of a panel by moving audio to the right of the edit points in the Destination panel In time compression the effect is similar except that in that case all of d2 is lost along with part of d3 The T T with Ripple commands preserve all audio simply displacing everything to the right of the In point In that case the result in the example above has the segments in the order d1 s2 tt d2 all d3 18 SonicStudio Version 5 TimeTwist If the time delimited by the In Out points in the Source panels is the same as the time delimited by the In Out point in the Destination panels then no squeeze stretch will be involved The result will be identical to a normal insert edit As Time Twist edits are performed the system automatically computes the ratios needed for processing and launches the required processing into the Background Queue Initially a b
24. ng You may elect to process only part of the file by entering values into the Start Time and End Time fields In that case the system will process only the portion of the file between those two points SonicStudio Version 5 TimeTwist To select a file for processing click where it says lt click here gt next to the words Input Sound File This brings up a MOFS Media Optimized File System browser for all available soundfiles alcohol final stump MOFS 1 SND Recordings arch snds0011 stump MOFS 1 SND Recordings 3 arch snds0011 dn0001 stump MOFS 1 SND Recordings arch snds001 a E carson duper editooo1 floor pie MOFS 2 SND Recordings E EthanFloorPie1 floor pie MOFS 2 25 Ethanstumpt stump MOFS 1 E footprints floor pie MOFS 2 SND Recordings 85 1 94 eq0001 stump MOFS 1 SND Recordings fam fs94 eq0001 ps0001 stump MOFS 1 SND Recordings f394 eq0001 a E horsey2 eq0001 stump MOFS 1 SND Recordings 25 Jail Guitar floor pie MOFS 2 E Jail Guitar Extract floor pie MOFS 2 SND Recordings ea Jail Guitar Extract ps0001 floor pie MOFS 2 SND Recordings Jail Guitar If the selected file is a member of a stereo pair the system displays a dialog box to ask if the second channel should be processed as well If the answer is Yes the other file is automatically placed in the Stereo Mate field If need be you can select a different file to be processed as the second channel
25. single segment or an entire edited sequence of segments In this case each segment will be pitch shifted separately and then automatically edited back together in the Destination panels Summary TimeTwist allows you to change the length of a section of audio while keeping the pitch of the output the same Pitch Shift changes the frequency of a section of audio without affecting the length of the output file TimeTwist and Pitch Shift may be used with or without an FX Processor installed in the system In the latter case processing will pre empt other uses of the system until execution is complete TimeTwist and Pitch Shift may be invoked using a dialog box to define the source Sound File and a set of parameters to be used for processing If an FX coprocessor is available TimeTwist may also be incorporated in the process of editing SonicStudio Version 5 25 Time Twist Pitch Shift 26 SonicStudio Version 5 Index A analyzing sound files 11 B background 2 background processing 5 Background Queue Manager dialog box illustrated 10 bar indicator for audio 19 browser MOFS 7 C cable connecting 3 channels multiple processing 20 compression 11 compression defined 8 D Delete Input checkbox 8 destination panel illustrated 17 dialog and parameter settings 15 dialog replacing 21 DSP 22 DSP menu illustrated 4 E editing with background Pitch Shift 24 editing with background T
26. source audio to accommodate a different length as specified by the placement of In and Out points in the Source and Destination panels The TimeTwist editing commands are not available unless an FX coprocessor card is installed SonicStudio Version 5 5 Time Twist Pitch Shift TimeTwist Launching TimeTwist The command T T Specifications in the TimeTwist submenu of the DSP menu is used to invoke time compression expansion for a Sound File or a portion of a Sound File This command is available whether or not the FX coprocessor is installed in the system Selecting the T T Specifications command brings up the Launch Twist dialog box Launch Twist Input Sound File lt click here gt Input Stereo Mate lt click here gt Specifications Start Time 00 00 00 00 Y ena time E Output File Output Sound File u Ratio 1 0000000 lt More Choices gt Processing Max Per Frame 1 000 Parameters Silence Thresh 80 0 Quality 0 750 Max Silence 1 000 Open Save Save As Default Cancel iauacr This dialog box lets you select a sound file to process name the output file and specify the rate of compression expression The system will process the designated source audio and create a new Sound File containing the processed audio Specifying Source Files The uppermost section of the dialog box selects a mono or stereo Sound File for processi
27. t dialog can fill in the gaps by sensing silences and shaping the line If successful the slipped dialog will appear to be in true sync SonicStudio Version 5 21 Time Twist Pitch Shift Pitch Shift Launching Pitch Shift The command P S Specifications in the Pitch Shift submenu of the DSP menu is used to invoke pitch alteration for a Sound File or a portion of a Sound File Pitch Shift functions like a combination of Time Twist and Sample Rate Conversion affecting the pitch of a sound file by altering its sample rate while keeping a constant duration This command is available whether or not the FX coprocessor is installed in the system Selecting P S Specifications brings up the Pitch Shift dialog box Pitch Shift Input Sound File lt click here gt Input i Stereo Mate lt click here gt Specifications Start Time O petete End Time MATE input Output File Output Sound File Ratio 1 0000000 0 5 to 1 5 lt More Choices gt Processing Quality 0 000 0 0 to 1 0 Parameters save As Default Cancel Launch This dialog box allows you to select a sound file to process name the output file and specify the rate of pitch change The system will process the designated source audio and create a new Sound File containing the processed audio Inputting and Outputting Sound Files The Pitch Shift dialog box functions much like the Launch Tw
28. to express the ratio of frequency modification in several forms SonicStudio Version 5 23 Time Twist Pitch Shift Pitch Shift Ratio O Speed Change 0 0000 50 000 to 50 000 O Semitones 0 000 12 000 to 7 000 6 Sampling Rate From 44100 00 To 44100 00 O Beats From 60 0000 To 60 0000 Besides conversion by time ratio the change in frequency may be expressed in terms of A percentage speed change Pitch transposition in musical semitones Change in sample rate Change from original to new tempo expressed as beats per minute Values may be entered in any of these forms Launching Launch Pitch Shift as you would TimeTwist Editing with Background Pitch Shift If an FX Processor board is installed in the system Pitch Shift may be invoked by editing using the five edit like commands in the Pitch Shift submenu Destination panels are affected as they are by similar commands in standard editing rippling displaces sounds to the right of the out point the length of the imported pitch shifted segment Note that no segment length changes take place in the Pitch Shift function Engaging a Pitch Shift editing command brings up a dialog box allowing you to set the precise ratio of frequency change 24 SonicStudio Version 5 Pitch Shift Ratio 0 8000000 0 5 to 1 5 Processing an Edited Sequence of Segments The Source panels may contain a
29. w the value set for the Quality parameter If this value is set too high the system may be unable to find enough acceptable splice points to deliver the requested ratio of compression or expansion Greater amounts of compression or expansion require correspondingly more splices Thus the further the Ratio parameter is from 1 either above or below the lower the value of Quality that can work 12 SonicStudio Version 5 TimeTwist The default value of 0 750 will support the full range of 2 to 1 compression or expansion for most non musical program material For smaller amounts of compression or expansion higher values may yield improved results by forcing the system to use only the best of the available splice points Note that any setting of Quality higher than zero will tend to distort short term timing For compression or expansion of musical material therefore the recommended setting is zero A somewhat higher value may possibly be of use for non rhythmic or rubato material overtone If a splice is called for in a given frame but none is acceptable Quality rating equal to or greater than the value set for the Quality parameter the process accumulates a deficit of splices that must be made up for in later frames The value of the Max Per Frame parameter tells the system how much flexibility it has in the expansion process The legal range is 0 5 to 3 0 Note that this parameter applies to time expansion only It
Download Pdf Manuals
Related Search