Frye Microscope & Magnifier TheTime-Frequency-Amplitude Microscope User's Manual
Contents
1. Channel B display icon Displays the results of the analysis done on channel B in three dimen sions and full color Channel Commands Third Selects the 1 3 rd octave analysis Sixth Selects the 1 6 th octave analysis Twelfth Selects the 1 12 th octave analysis Analyze Performs the selected analysis of the signal Play All Plays the entire wave file to the sound card audio output e Play Outer Plays the data within the total analysis window Tempus 3D Play Inner Plays the data in the dark ened area of the analysis window the data that will be presented in the graphical display Position Window Just to the right of the word Tweak this window displays where in the duration of the signal the analysis window is located Tweak The arrow buttons to the right of the position window will move the position of the data analysis window by a small amount The increment of movement can be manipulated in the Options menu Click on Settings and then go to General to adjust the Tweak setting Tweak can be useful if there is a slight time shift between the two channels that needs to be equal ized Time Scale Window Displays the cur rent time scale range between 20 and 5000 milliseconds Up and down buttons Located to the right of the time scale window these but tons adjust the time scale A Step by step Guide to TEMPUS This section of the manual will walk y2. is scaled as 0 dB The analysis is in decibels related to the 0 dB level The analysis is done in amplitudes phase is not used A second related window is displayed with the color bar and its color calibration It should be noted that the color calibration follows the limits or clipping windows on the toolbar When initially shown the top limit is set to the highest point on the graphed object The lower limit is set 50 dB below the upper limit These limits can be changed as desired the color bar following the change TEMPUS 3D Commands Most of the commands available in TEM PUS 3D are activated through buttons on the Dialogue bar although some are found on the toolbar TEMPUS 3D also has several keyboard activated commands that are very useful Below is a list of the commands used in the TEMPUS 3D and a description of what they do Left mouse click plus Shift key moves the origin of the graph Left mouse click on the graph window near the object will draw a vertical line that represents the position of a slice graph that can be created See below in the key board section and the use of the S key Toolbar Commands Open File Icon Opens T3D files Help Icon Accesses the Help Contents Dialogue Bar Commands x axis rotation This command window is one of three similar windows located at the left of the screen This window controls the rotation of the x axis the time axis The number in the
3. kHz the program will return an error when you click on the analyze button Also note that the bandwidth and time window are set automatically as different sampling rates are used for the WAV file Sampling Maximum Window Rate Analysis Freq Width 8 to 16 KHz 4 KHz 240 mS 16 to 32 KHz 8 KHz 120 mS above 32 KHz 16 KHz 60 mS Tempus can handle both single and dual channel data files Single channel data will always be displayed in channel A and dual channel data will be split between channel A and channel B Channel A is located in the field at the upper half of the screen and channel B in the field at the lower half of the screen TEMPUS Commands Most of the commands available in TEM PUS are activated through buttons located at the bottom of each channel field al though some are found on the toolbar at the top of the screen Below is a list of the command buttons in the TEMPUS screen and a description of what they do The left mouse button will display a set of dotted lines that show the position of the filters on the set of data The right mouse button is used to select the beginning of the part of the time win dow that is to be analyzed When a time window is selected try to make the skirts of the window fall in the sampled data stream Toolbar Commands Open file icon Opens a new file Channel A display icon Displays the results of the analysis done on channel A in three dimensions and full color
4. TEMPUS 3D TheTime Frequency Amplitude Microscope Version 1 01 FRYE ELECTRONICS INC P O Box 23391 Tigard OR 97281 3391 USA 503 620 2722 800 547 8209 Fax 503 639 0128 FRYE http www frye com e mail general frye com 2000 by Frye Electronics Inc All rights reserved 4 00 Contents DescupDE sac iced cae is faecal eeu editus Gub quotes cu doce qtia Lbs dde dcdit A add 1 Gomputer ReQuineMents uscdvwsene ama e aos kie Dn d OO FORDERN GR SHARE NASA SUR MNA HR MSS 1 Installation s eb cad ee niie Nbre ipud tbe enti er Sub eei abii ned dida 1 Getting Started ous dcbet dotati cid E Ten E M dcc needs 2 User Interlace ci dort eb bt nua TA ERR ANTE tao REA SM Redi al MAT eel udis 2 Using TEMPU S 4 uide tmd tutes eer tbc deu i eta E Par eee Ud aUe 2 TEMPUS Commands insichsentecon cite ra ide uec b ERAI Rech t ET ene UR Ph 3 Toolbar Comma ds 9 acted ne irere o ii au tp od pd CORTE 3 A Step by step Guide to TEMPUS 4 eter rtr narrat rd pendeat dd 3 Using TEMPUS 3D ictor si edis noua e cet adde Rename he eel ae TT ua du ASIE aed 4 TEMPUS 3D Commands uincere bere nade e eroe eU 4 Toolbar Gommands aede eid ed Greed EA i eure eel eU ET PL eles tte wae 5 Keyboard Commands sssini enii ena An dea e Spei Sr dt Er p igus 5 A Step by step Guide to Using TEMPUS 3D eee eene 6 Storage GF Anal ysis Files uice nda da ER HT P OU RR oe e ER meu 6 Slicing the analysis display object 1 esee are eret aec d 7 Analysi
5. adjusted either by clicking on the arrows immediately to the right of each window or by positioning the cursor in the window and entering a value using the keyboard When a range is shortened by use of the clip levels the color range is also rescaled to fit between the two chosen levels Keyboard Commands Up arrow T Rotates the object on the x axis ten degrees in the clockwise nega tive direction Down arrow 4 Rotates on the x axis ten degrees in the counter clockwise posi tive direction Left arrow Rotates on the y axis ten degrees in the clockwise negative direc tion e Right arrow Rotates on the y axis ten degrees in the counter clockwise posi tive direction Page Up Rotates on the z axis ten de grees in the clockwise negative direction Page Down Rotates on the z axis ten degrees in the counter clockwise positive direction Plus key on the number pad En larges the object Minus key on the number pad Reduces the object L key Moves the light source to the left R key Moves the light source to the right U key Moves the light source up toward the top of the screen D key Moves the light source down toward the bottom of the screen F key Moves the light source farther away from the object N key Moves the light source nearer to the object S key Create a new window with a 2D graph s
6. d in space The object can be drawn as a wire frame object or as a complex surface With the new Tempus software it is pos sible to look at sound and see how the amplitude frequency and time relate to each other Tempus 3D Computer Requirements The Tempus software is designed to run with Microsoft Windows 95 98 or NT 4 0 as its platform You must have at least a 486 chip though it is recommended you run the program on a computer with a Pentium chip with MMX With this software the faster the computer the better You will need at least 16 Megabytes of RAM though 32 is preferable and 10 Megabytes of free hard disk space Your system needs to be equipped with a sound card and a graphics accelerator designed for openGL is highly recommended Sixteen or 32 bit color gives the best images but 256 colors will also work The computer also needs to be set to 800 x 600 resolution minimum and small fonts Installation Installing Tempus on your computer is easy Close all applications except possibly the Windows Explorer Before inserting disk 1 note the serial number on the label You will need to enter this number while the disk is in the drive Insert disk 1 into the drive Either go to Run in the startup menu and type in A setup exe or open the setup exe file from Windows Explorer After this step the installation wizard will walk you through the rest of the process You will be asked to input the serial
7. ill appear telling you the time position of the slice when it is taken Type s A new window will appear with the 2D graph representing the values of the object data at the time of the slice Resize the window and move it in relation to the main display window as needed Other slices can also be made of the object as desired the windows displayed simulta neously to show the frequency characteris tics of the object at different points in time The color bar associated with the parent display window carries the information of the amplitudes of all of the 2D graphs as well as that of the main object The 2D graphs also can be moved and resized within their individual graph windows as needed by use of the same key functions as are used with the 3D object Tempus 3D Analysis of Different Parts of the Sampled Data Set When a certain part of the data set has been analyzed and you want to make a change to look for different effects such as a change in the analysis bandwidth minimize but don t close the TEMPUS 3D window you will then be returned to the TEMPUS analysis window Make the additional analysis and display it with a new copy of the TEMPUS 3D program You will need to recall the TEMPUS 3D display program by clicking on the program indicator at the bottom of the screen If it is desired to compare the original analysis with the new one use the Windows functions to cut the window to half screen a vertical partition w
8. lice of the 3D object A new window appears with the object sliced along the line of the slice line The time position of the slice is also marked on the graph The color used in the 2D graph will correspond to the object s color bar A Step by step Guide to Using TEMPUS 3D Once TEMPUS has analyzed the data and you have clicked on one of the Display Channel icons Tempus will automatically take you into TEMPUS 3D In TEMPUS 3D you can view a three dimensional picture of sound from any angle The following steps will give you an idea of how to manipulate the graphical display Tempus 3D 1 Once TEMPUS 3D has displayed the analysis in the form of a spectrogram look for the axes The frequency axis z axis runs vertical along the screen the time axis x axis runs horizontal and the amplitude axis y axis runs perpendicular to the screen this is sometimes described as coming out of the screen 2 Once you ve oriented yourself to the axes play with the rotation using the keyboard commands 3 Click on the surface wireframe button to switch the appearance of the display be tween a wireframe and a complex surface 4 Then use the axis rotation command windows to refine the position 5 Use the plus and minus keys on the keyboard number pad or the buttons on the dialogue bar to make the object the desired size 6 To reposition the object on the screen press the Shift key and hold it down while you click the lef
9. num ber from disk 1 When the icons for the program have been generated they can be moved to your desktop with the mouse Click on the TEMPUS icon hold the left button down and slide the icon to the place on your desktop where you want it to be Close the small now empty startup win dow by clicking on its X Windows is a registered trademark of the Microsoft Corporation Pentium is registered trademark of Intel Corporation Getting Started Once the Tempus program is installed on your computer the two portions of the program need to be set up to run together The Tempus program really consists of two programs the TEMPUS portion does the analysis and the TEMPUS 3D portion does the graphical display Throughout this manual Tempus refers to the program in its entirety TEMPUS refers to the portion of the program that does the analysis and TEMPUS 3D refers to the graphical display part of the program These two programs are automatically linked at startup If changes are made to the locations of the two programs then they will need to be linked in order for the program as a whole to function properly User Interface The Tempus program user interface is organized to be consistent with the Win dows platform In TEMPUS the top of the screen has the familiar menu bar and toolbar TEMPUS 3D has a menu bar and the option of displaying a toolbar a dia logue bar and a status bar The TEMPUS menu bar consists of
10. orks best with the screens viewed side by side Then recover the original analysis cut it to half width and position it next to the second analysis A B comparisons are then easily made
11. ou through the usage of the TEMPUS portion of the Tempus program 1 Begin by opening the Tempus program The TEMPUS screen is the opening screen 2 Click on the Open File icon and choose a WAV file 3 Once the file is loaded you will see the pattern of the wave file as it changes in time in channel A if it is a single signal and in both channels if it is a dual signal 4 Select a section of the signal for analysis by clicking on the screen with the right mouse button This program is most strik ing when you choose a portion of the signal that looks interesting When you click on the signal with the right mouse button a 60 millisecond portion of the screen is shaded if the sampling rate is above 32 KHz The analysis will be done on that part of the signal To either side of the shaded section is a single dark line Those are the filtering lines everything within those lines contrib utes to the analysis of the signal 5 There are three different ways you can listen to the signal Clicking on the Play button will play back the entire file click ing on the Play Outer button will play everything within the two dark lines and clicking on the Play Inner button will play just the shaded part of the signal When you click Play Inner you will hear only what you are analyzing 6 If you want to adjust the position of the analysis window click on the tweak arrows Doing so will move the position of the analysis windo
12. s of Different Parts of the Sampled Data Set seeren 7 Description The world as we know it through our senses is constantly changing Unfortu nately the world that we measure through analysis is steady state With few excep tions the tools we use to analyze the world assume that the data being analyzed will repeat in a regular fashion The Tempus software program is a step toward true high definition time frequency analysis It collects data by sampling and analyzes it by subjecting the data to searches with a series of mathematical filters scaled for frequency and temporally shifted or translated in time across the sampled data The Tempus program ana lyzes sound falling within a selected win dow typically 60 milliseconds wide but the analyzing filters have actually extend in time before and after the analysis window giving the window skirts Data from the skirts contribute to the final results of the analysis particularly in the low frequen cies This approach is different from that of the Fourier Transform which only analyzes the data points in the window It also makes possible the seamless analysis of a series of sample windows one placed immediately after the other with no loss in information Display of the results of the analysis is also important and it is here that the Tempus program really shines It is possible to display the data in full color as a three dimensional object that can be rotate
13. t mouse button where you would like the object to be located on the screen 7 If you want to limit the range of the amplitudes you can do so with the top and bottom clipping command windows 8 You can adjust the light source to accent the contours of the object in a differ ent way by using the L R U D N and F keys Storage of Analysis Files If an analysis yields a result that the opera tor wishes to save then use the Windows Explorer to locate the T3D file Output1 t3d for channel 1 and rename it as another file This file will reside in the directory of the WAV file that was used in the analysis If the file is not renamed it will be overwritten when the TEMPUS program is used to make an additional analysis for that channel and that directory Of course if the file is lost it is usually a fairly simple process to redo the analysis and recreate the file Slicing the analysis display object Many times interesting features appear in the display object that contain frequency components worth looking at With Tem pus 3D a slice can easily be made of the object at a point in time Use the mouse and position the cursor near the point where the feature is seen Click the left mouse button and a vertical line will appear It is best to operate slice while in the spectrogram display because the line is drawn parallel to the frequency axis above the time point of the object click on the RESET button A number w
14. the File Menu the Options Menu and the Help Menu The toolbar contains shortcut but tons for the most common selections from the file menu and the links to the TEMPUS 3D portion of the program the graphical display The TEMPUS 3D menu bar includes a the File menu a View menu for displaying or hiding the different bars and a Help menu The Toolbar is standard containing short cut buttons for common functions The Dialogue bar contains buttons that execute various commands that manipulate the three dimensional display These com mands will be covered in detail later in this Tempus 3D text The Status Bar notes the channel being displayed the sampling rate of the signal being examined and the octave used to analyze the signal Using TEMPUS Tempus uses the popular WAV file as a source of data It allows the user to choose from three bandwidths 1 12 th octave 1 6 th octave and 1 3 rd octave These choices let the user determine whether the results will have high definition in frequency 1 12 th octave high definition in time 1 3 rd octave or a balance between the two 1 6 th octave The TEMPUS programs are designed so that the different analysis bandwidths can be compared with each other by retaining the same analysis win dow widths regardless of the bandwidth chosen This program can analyze signals with sampling rates from 8 kHz up to more than 44 kHz If the sampling rate of a signal is less then 8
15. w only in the channel that the tweak buttons are active in If you are using automatic alignment it will no longer apply 7 Choose which analysis you would like to do 1 3rd octave 1 6th octave or 1 12th octave 8 Click on the analyze button The mouse arrow will turn into an hourglass Once it turns back into an arrow the analysis is complete 9 View the three dimensional display by clicking on the appropriate channel display icon on the toolbar TEMPUS 3D will automatically load and you will now be in the TEMPUS 3D part of the program TEMPUS is still in memory but in the background Tempus 3D Using TEMPUS 3D TEMPUS 3D displays the data analyzed by TEMPUS in full color and three dimen sions The entire range of amplitudes present in the analyzed data is scaled along the full spectrum of color the lowest amplitudes in blue the highest extending into red The three axes of the object pro vide scales for the time amplitude and frequency The time is scaled on along the x axis the amplitude along the y and the frequency along the z You can display the data as a wireframe object or as a complex surface The three dimensional object can be rotated in space it can be enlarged or reduced and the light source that high lights the contours of the object can be moved The analysis is scaled so that an integer value of 100 peak for a sinusoidal wave at the mid frequency of a filter band in the wav file
16. window denotes in degrees how far the object has rotated from zero It can be used one of two ways You can click on the up down arrow keys imme diately to the right of the window or you can position the cursor in the window and type in a number e y axis rotation This command window works the same as the x axis rotation but it pertains to the y axis amplitude axis z axis rotation Same as the two above but this one shows how far the z axis frequency axis has rotated Refresh When you change the x y and z axis rotations in the command windows or when you adjust the clipping explained below you must do one of three things before the changes will be implemented Pressing the keyboard s RETURN key clicking on the graph part of the window or clicking on the REFRESH button will Tempus 3D refresh the screen e Reset This button resets all three axes to zero e Surface Wireframe The object can be displayed as a complex surface or as a wireframe Whichever one you are cur rently using the opposite name will appear on this button Click this button to switch between the two Plus and minus These two buttons enlarge and reduce the object respectively Top Clipping Bottom Clipping lIf you are particularly interested in a specific range of amplitudes you can limit the range dis played by adjusting the top clipping and bottom clipping Both of these control windows can be
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