VP-880 VOICE DEVELOPMENT SYSTEM USER'S MANUAL
Contents
1. A little bit of background noise is normal with digitized voice If there is excessive background noise then 1 the recording level may be too low 2 the host computer has a noisy power supply or 3 the board might be defective If there is a popping noise from time to time especially when the disk is being accessed it s most likely due to the disk drive being too slow 27 If the sound pitch is apparently lower than normal the host computer is probably too slow If the sound is distorted then the recording input level may be too high signal waveform is clipped on the top One last question is the original sound source clear in the first place PROBLEM 6 How can improve the sound quality in my actual playback device Besides increasing the sampling rate try the following 1 Use a graphical equalizer to pre condition your source sound For example if you need more bass simply boost the low frequencies with the equalizer This method proves to be very effective 2 Select the proper filter bandwidth on the VP 880 board by setting the 6 position DIP switch as following DIP Switch Setting Filter Bandwidth Suitable Sampling Rates 51 52 others OFF 300 to 3 4 KHz 12 to 64 Kbps S1 S2 OFF others ON 100 to 5 4 KHz 64 to 128 Kbps This selection should be made based on your sampling rate and the nature of your sound If you select the extended bandwidth 100 to 5 4 KHz you WILL have more background noise in your2. 10101010 and could appear occasionally in an un assembled file When an undesired EOM flag is found in the middle of a file one of the bits will be changed so that it s no longer a EOM flag 2 Add a EOM flag to the end of every source file and combine them together into a single temporary file The EOM flag is used by multi message voice processors such as VP1410 VP1606 and VP1608 to locate the proper message in an EPROM At this point you will be prompted at the bottom of screen to either play the temporary file press lt 1 gt or Page amp Save it press lt 2 gt The Page amp Save command breaks the single temporary file into several smaller target EPROM sized files If the temporary file is smaller than the target EPROM in the first place it is simply patched with enough dead space to increase its size to match the target EPROM s 22 Before storing assembled files to disk VP 880 asks you to enter a filename with a search path if any but no extension It automatically adds a number as the filename extension to the files For example if three files are created as a result of assembling eight individual message files they will be named FILENAME 1 HLENAME 2 FILENAME 3 These binary format files are of the same size as the target EPROM and can be downloaded to a standard EPROM programmer to program EPROM chips Remember to the the Binary format when downloading the files to the EPROM programmer Refer to you
3. EMS memory If you are going to record messages longer than 500K bytes single message length not combined you must have EMS memory in your computer and use 880EMS Otherwise VP880 is adequate and more efficient than 880EMS If you need help on EMS memory see Appendix A Once the proper program name is entered the screen displays a menu similar to the following Eletech Electronics VP 880 Speech Development Program Version 1 2 1 f 0000000 0000000 0000000 0000000 0000000 0000000 0000000 0000000 0000000 0000000 0000000 0000000 0000000 Stop Address i Segment 0000000 Set Start Address i Segment 0000000 Set Stop Address i Segment 0000000 f i f i Sample rate Test emory Used 00000000i Segment Speaker ON OFF urrent Byte 0000000 Segment Record otal Memory 00510352 Segment Play iSegment Load iSegment Save Segment Speech Editing Segment ROM Data Management tart Address 0000000 Segment i ESC Quit top Address 0000000 Segment tep Size 0000512 Segment c Eletech Electronics indow Size 0000000 Segment 1990 All Rights Reserved iSegment Start Address i Segment Qn is I9 IP 1 OY O1 iS QI IS Set Step Size Total Length 0000000 Save Data To Disk ROM Size 0000000 13 When the program is first activated it checks the VP880 board and flashes the current sampling rate on screen If
4. If you don t have EMS memory you will have to run VP880 EXE and be limited to about 500K bytes maximum length for any single message In the Record Play Menu the Current Byte field counts up as recording goes on showing you how many bytes have be recorded If you start a new recording it counts up from zero If you append to a previous recording it counts up from the end of the previous recording The Memory Used field shows the amount of memory used so far The Total Memory field shows how much memory in number of bytes is available To stop recording press any key You will be returned to the Main Menu You may then Play the message to see if it s OK use the Play function or Save the message to your hard disk use the Save function or Edit the message use the Speech Editing function or 16 Append to the recording use the Record function or Disgard the recording and start a new one use the Record function If you want to append to a message file already stored on your hard disk you may do so by first loading itinto the memory use the Load function and then append to it use the Record function To obtain the best sound quality for a certain sampling rate first have the message recorded by a voice talent in a recording studio with profes sional equipment onto a cassette tape Then download the message into the system via the TAPE input jack No recording level sensitivity adjustment
5. for a multiple message voice module or IC you have to use the ROM Data Management function to combine them after they are separated into individual message files If these messages are to be used for single message voice modules then no other operation is required Just download the message as a binary file to an EPROM programmer and program 5 20 H ROM Data Management This function is used to combine several message files into a multiple message format It adds the necessary End Of Message EOM code between messages so that multiple message voice processors VP1410 and VP1610 knows how to locate the target message Press lt gt to enter the ROM Data Management Menu The operation is pretty straight forward First you tell the system what size of EPROM you are using Available selections are 256K 512K 1M 2M 4M and 8M Then when the Filename Menu opens in the center of the screen you enter the filenames of the messages to be combined in the order you want them to appear in the EPROM Length of each file in bytes along with the combined length and number of EPROM needed is displayed for your reference You may enter filenames with search path If you enter a filename which can not be found the computer will beep and refuse to go on You have to enter a correct filename to continue or press lt Esc gt to quit The following commands are available to help you enter the correct filenames lt Up Arrow g
6. is necessary in this case If you are recording directly from a microphone you will definitely get more background noise You should adjust the microphone sensitivity pot on the VP 880 board to reach a proper recording level in order to avoid clipping distortion There is no VU meter available for this purpose so you have to do some try and error experiment until you get it right The rule of thumb is that your recording should sound about as loud as our demo message 880DEMO VOC If you want to record several messages in one shot you may do so as long as you have enough memory to buffer them For example if you have five Separate messages in a roll on a cassette you may record them as a single message and then separate them by using the Speech Editing function Once separated you may save them to the hard disk as separate files The Speech Editing function also allows you to trim off the dead space in the recording undesired silence before and or after the actual message See its description in this chapter for details Finally always remember to save the recording after you have done the necessary editing and or separation If you don t save it it will not be stored on the hard disk for later use D Play This function is used to play the message stored in the system memory If you want to play a file stored on your hard or floppy disk you must load the file into the system memory first by using the Load function If
7. message due to the wider bandwidth If you are not sure digitize your message with both bandwidths and see or hear which one you like better 3 Use a proper speaker in your application A good speaker will certainly make a lot of difference in the sound quality Also a speaker in an enclosure will usually sound better than a speaker without an enclosure If you don t get enough volume output from your speaker try using one with a bigger physical size Sometimes sound quality is degraded when an under powered speaker is used 28 PROBLEM 7 Message files are not assembled correctly Your hard disk or floppy disk is probably almost full In order to assemble message files VP 880 needs a working disk space of roughly the same size as the files combined If there is not enough available disk space VP 880 will produce files of erroneous size without a warning 29 30 Appendix A HARDWARE SPECIFICATIONS Voice Input JR1 microphone input 3 5mm 1 8 phone jack JR2 line level input 3 5mm 1 8 phone jack mono or stereo Stereo signals will be mixed into a mono sound for digitization Input Filter Bandwidth 300 Hz to 3 4 KHz standard or 100 Hz to 5 4 KHz extended Digitization Technique CVSD with variable sampling rate Voice Output JR3 speaker output 3 5mm 1 8 phone jack Manual Adjustments VR1 microphone sensitivity VR2 speaker volume VR3 sampling rate 12 to 64 Kbps Host Computer Int
8. 4 Kbps by turning a adjustment knob There are many different encoding techniques for voice digitization The VP 880 uses one called CVSD or Continuously Variable Slope Delta modulation This technique encodes the direction of the signal wave form one bit per sample Since a bit can only have two possible states the signal is encoded to be either going up bit 1 or down bit 0 A period of silence should theoretically be encoded as 01010101 In reality however it looks more like 00101110 There are both a ADC Analog to Digital Converter and a DAC Digital to Analog Converter on VP 880 When VP 880 is in the record mode both ADC and DAC are put to work at the same time The ADC converts sound input into digital data to be stored on a disk while the DAC takes that digital data and converts them back to sound simultaneously Therefore when recording the sound coming out of VP 880 s speaker has actually gone thru both ADC and DAC The sound s quality at a particular sampling rate will be very similar to what you will get when it is played back from the actual playback unit The VP 880 also incorporates highly sophisticated input and output filters The input filter limits the input bandwidth before signals enter the ADC in order to avoid signal aliasing The output filter smooths out the rough edges of the the DAC output There are two sets of filters on VP 880 for two different bandwidths One set is used for the sta
9. VP 880 VOICE DEVELOPMENT SYSTEM USER S MANUAL TABLE OF CONTENT CHAPTER 1 INTRODUCTION eren 3 CHAPTER 2 PACKING 7 CHAPTER 3 INSTALLATION AND TESTING 9 CHAPTER 4 RUNNING THE SYSTEM PROGRAM 13 CHAPTER 5 PROBLEMS 8 SOLUTIONS 25 APPENDIX A HARDWARE SPECIFICATIONS 31 Chapter 1 INTRODUCTIONS The VP 880 Voice development System is an IBM PC based voice digitization system used to record and organize voice files for EPROM based QuikVoice modules and ICs Messages can be either directly recorded from a microphone or downloaded from a cassette tape player Here messages can be any sounds including human voice animal sounds special sound effects or even music Messages are actually digitized not synthesized so they sound as natural as the original Once recorded these messages become voice files and are usually stored on a hard disk in the host computer These voice files can then be downloaded into a standard EPROM programmer and used to program EPROMs The VP 880 comes in a kit form consisting of a voice digitization board a speaker a microphone and a system program The voice digitization board is an 8 bit add on card to be installed into any available slot in the host computer Under proper software control it basically turns the host computer into a d
10. acket clockwise to increase the sampling rate counter clockwise to decrease the sampling rate The sampling rate 14 display will change instantly as you turn the knob Press any key when you are done Note that the sampling rate knob is very sensitive and it could be hard to adjust the sampling rate to exactly what you want However a tolerance of 2 Kbps is usually acceptable since it has very little effect on the sound quality Sometimes the sampling rate will show 0 0 Kbps momentarily especially when you are adjusting it This is OK If you have turned the sampling rate knob since the last time you ran the Sample Rate Test VP 880 is probably running at a different sampling rate than the one shown on screen Although a wrong sampling rate display does not affect the normal operation of VP880 it is misleading and should be avoided B Speaker ON OFF This function toggles the speaker on and off The speaker status is always displayed on the screen in the SPEAKER STATUS field Most of the time you want to leave the speaker on so you can hear the sounds But when you use a microphone to record messages you may want to turn off the speaker in order to avoid the possible hawling effect speaker produc ing a loud high pitch noise due to positive feedback If you are transferring messages from a tape player into the system via the LINE input jack you may safely turn on the speaker without causing the hawling effect To turn t
11. e is also a save command in the Speech Editing function which allows you to save a specific portion of the memory If you don t want to save the file in the current directory you may specify a full path name such as A BACKUP VOICE TEST VOC or FILES TEST VOC You may save files to a hard disk or a floppy disk If the file already exists you will be asked to either overwrite it or select another filename After saving the system memory is not cleared and still contains the same data as before The old data will be lost only when you load a new file make a new recording or exit the program G Speech Editing Pressing the G key from the Main Menu puts the system in the Speech Editing mode In this mode you can select and save a portion of the System memory If you want to edit a message file stored on a hard or floppy disk you have to use the Load function to load it into the system memory first In the Speech Editing mode the following commands are available Up Arrow Down Arrow Moves the Start Address by a Step Size Left Arrow Right Arrow Moves the Stop Address by a Step Size lt A gt in the Start Address directly B Type in the Stop Address directly lt C gt Change the Step Size D Save data from Start Address to Stop Address to disk Space Bar Play data from Start Address to Stop Address Using the above commands you will be able to cut a section of the recording and save i
12. erface Bus Interface IBM PC ISA 8 bit Address 238H to 23FH Interrupt Request IRQ 2 DMA Request none Voice Compression none Most voice compression schemes compress voice data at the cost of sound quality For example the ADPCM technique usually boasts a compression ratio of 2 1 or higher In fact a so called 4 bit ADPCM usually samples in 8 bit resolution 7 8 bits but stores only 4 bits of data which encode the change of signal value from the previous sample If the 31 change is bigger than 4 bits can encode distortion occurs The CVSD technique that we use is sort of a 1 bit ADPCM Each sample value change is encoded in just one bit In order to compensate for the smaller number of encoding bits CVSD is usually sampling in terms of KHz at a much higher rate than an ADPCM This means that CVSD can usually achieve the same compres Sion result as the so called voice compression techniques by just reducing its sampling rate Because both ways you get less amount of data with a lower sound quality We dare to compare the sound quality of our modules and ICs with any other brands at the same data rate com pressed or not 32
13. he speaker on or off simply press B from the main menu The SPEAKER STATUS display will toggle between ON and OFF to indicate the current speaker status C Record Before you do any recording make sure you have adjusted the sampling rate to the desired setting and selected the proper filter bandwidth Refer to Chapter 3 Installation and Testing for details on these adjustments 15 Press C from the main menu to choose this function The system will enter the record standby mode In the record standby mode the sound source microphone or tape is looped back to the speaker in real time without doing any actual recording If the speaker is on you can hear the sound source which has actually gone through the entire digitization process encoding and decoding Therefore the sound quality will be very similar to what you will get in the actual application Once in the record standby mode the following options are available lt Esc gt Key Quit this function A Key Append to a previous recording Any Other Key Start a new recording and overwrite system memory When recording the message will be digitized and stored temporarily in the system memory Thus the available system memory amount limits the maximum length of a single message If you have EMS memory and run 880EMS EXE the entire EMS memory be used to store the recorded data This usually means that you can record 2 or 3M bytes of data as a single message
14. igital recorder The recording procedure is very similar to the way you use a tape recorder except that the messages are stored on a hard disk instead of a tape There are two input jacks on the digitization board one for the supplied microphone and the other for a line level output device such as a tape player The supplied speaker connects to the board s output jack for message reviewing purpose The system program with menu driven user interface is very easy to use It provides the following functions Record and play messages Test and display current sampling rate On screen message length counter like a tape counter Save all or part of a message as a separate message Combine messages together for multiple message applications Voice digitization is a way of turning reaHife analog signals into computer digital format The process is very similar to filming a movie you take snap shots of a continuous motion ata fast constant rate When the film is played back the motion is re constructed and seems to be continuous again The rate at which this process is done is called the sampling rate Basically the sound quality gets better with a higher sampling rate However a higher sampling rate generates more data for storage translating into higher memory cost Therefore you should select a sampling rate carefully in order to obtain the optimum quality cost trade off The VP 880 allows you to select any sampling rate from 12 Kbps to 6
15. lly the higher the better 25 If the VP 880 still shows 0 0 Kbps sampling rate the board may be defective Contact your dealer for repair or replacement PROBLEM 2 Nothing comes out of the speaker 1 If the sampling rate reads 0 0 Kbps see PROBLEM 1 for solutions 2 Check the speaker connection Note that there are three identical jacks on the VP 880 board and the speaker jack is the bottom one 3 Make sure the speaker is turned ON in the VP 880 program 4 Adjust the speaker volume The volume knob is mounted on the VP 880 board and not accessible from outside the computer you have to open the computer to make the adjustment See the VP 880 Board Diagram in Chapter 3 for the location of the volume knob Turning the knob clockwise increases the volume counter clockwise decreases it 5 If you are using a microphone make sure it s switched on Check the battery inside the microphone if there is one Test the microphone elsewhere and make sure it s good 6 Test the speaker elsewhere and make sure it s good PROBLEM 3 How do install EMS memory in my computer First be aware that you don t need any EMS memory if you are not going to run 880EMS EXE of which the only benefit is allowing you to record a message longer than VP880 EXE can handle usually larger than 4M bits Second having EMS memory in your system will add additional burden to your computer This means that if your computer is not tha
16. ndard bandwidth 300 to 3 4 KHz and the other is used for the extended bandwidth 100 to 5 4 KHz Selection is made via a DIP switch Chapter 2 PACKING LIST amp SYSTEM REQUIREMENTS The VP 880 Voice development system comes with the following items one each IBM AT compatible voice processing board system program diskette microphone speaker line input adaptor cord User s Manual It requires a host computer not included with the following minimum specifications 386 compatible personal computer 25 MHz or faster minimum 512K system memory EMS memory highly recommended a 3 5 or 5 25 floppy disk drive a hard disk is highly recommended but not required all video display types are supported PC DOS or MS DOS version 3 0 or higher Chapter 3 INSTALLATION AND TESTING The VP 880 digitization board can be installed into any available slot in the host computer by following these easy steps INSTALLATION STEP 1 VP 880 can use interrupt IRQ2 default 5 or 7 but it always uses O address 238H to 23FH eight bytes Check all add on boards in your computer and make sure there are no conflicts Pay special attention to devices such as bus mouse network interface card and VGA card they may use IRQ2 same as IRQ9 If there is an IRQ conflict change the VP 880 s IRQ setting by moving the IRQ jumper to another location Please refer to the circuit board diagram below INSTALLATION STEP 2 Select the pr
17. oper filter bandwidth on the VP 880 board by setting the 6 position DIP switch as following VOL SENS En 51 lt 6 ON OFF m 9 SPK VP 880 DIP Switch Setting Filter Bandwidth Suitable Sampling Rates 51 52 others OFF 300 to 3 4 KHz 12 to 64 Kbps S1 S2 OFF others ON 100 to 5 4 KHz 64 to 128 Kbps This selection should be made based on your sampling rate and the nature of your sound If you select the extended bandwidth 100 to 5 4 KHz you WILL have more background noise in your message due to the wider bandwidth If you are not sure you can always change it later INSTALLATION STEP 3 Turn off the host computer Install VP 880 board into any available slot firmly but leave the cover open for now You may need to make some manual adjustment later INSTALLATION STEP 4 Connect the microphone and the speaker to their respective jacks on the VP 880 board Refer to the following diagram for jack locations After the board is installed turn on the host computer and install the program with these steps INSTALLATION STEP 5 Make a backup copy of the supplied diskette and put it in a safe place The diskette is not copy protected Then use the DOS COPY command to copy all files from the diskette to your hard disk We recommend that you create a subdirectory for s
18. r EPROM programmer s manual for downloading procedures 23 24 Chapter 5 SOLUTIONS TO COMMON PROBLEMS All of the following problems could be due to a defective VP 880 board If after trying all suggested solutions below you still can not make it work then contact your dealer for further assistance PROBLEM 1 The sampling rate shows 0 0 Kbps It s OK if the sampling rate shows 0 0 Kbps momentarily when you are adjusting it But if it shows 0 0 Kbps constantly the board may not be working properly There is probably an IRQ more likely or I O address less likely conflict between the VP 880 and another add on board in your system If you can not determine which one is causing the conflict try removing all add on boards except the video card and the floppy hard disk controller card If doing so solves the problem add those add on boards back one by one and see which is causing the problem Once you find out which add on board is conflicting with the VP 880 you must re configure its IRQ or I O address whichever is causing the conflict Note that VP 880 must use IRQ 2 and I O address 238H Another possibility is that the bus speed of your computer is too high If your computer has a bus speed higher than 8 MHZ try lowering it to 8 MHz or slower This can usually be done by changing the advanced CMOS setup in your computer Do not confuse the bus speed with the CPU speed The VP 880 can work with any CPU speed and actua
19. rmly connected to the board If the message sounds OK proceed to the next step TESTING STEP 4 Select the Record function Turn on the microphone remember to put in the battery first and start speaking You should hear voice of yourself coming from the speaker clearly If not try adjusting the microphone sensitivity by turning the sensitivity pot labeled VR1 If you still can t hear anything test the microphone elsewhere and make sure it s good If you can hear yourself but the sound quality is poor it may be due to 1 the microphone sensitivity needs adjustment or 2 the microphone needs a new battery or 3 the board is defective 11 You may adjust the sampling rate while you are recording to hear the sound quality at different sampling rates If 32 Kbps does not sound good enough you may increase the sampling rate Note that the sampling rate display will not be updated until you do another Sampling Rate Test If the board passed all the tests described above the system is properly installed and ready to use Chapter 4 RUNNING THE SYSTEM PROGRAM The system program is menu driven and very user friendly ha ha ha To start the program first change to the subdirectory where the program is stored then enter VP880 IRQ or 880EMS where is the IRQ setting Note that BBOEMS supports IRQ 2 only These two programs are basically the same except that VP880 uses convention DOS memory while 880EMS uses
20. t lt Down Arrow gt Moves the cursor up and down lt F1 gt Search and select files The command allows you to view the contents of a directory similar to a DOS DIR command and select files without typing in filenames After you press the lt F1 gt key a small window opens up on the left side of the screen which will be used to display directory contents and the File Name window in the center is the one that you use to enter filenames On the bottom of screen it says Please Input Pathname 21 At this point you have to either press the Enter key to accept the default path all files in the current directory or enter a path name such as C VOICE VOC The File Name window on the left will then be filled with filenames found in the path You have the following options Up Arrow gt Down Arrow Move the cursor up and down Ins Mark the file Del Un mark the file Space Bar Play the file without marking it Enter Quit and select all marked files This command brings all marked filenames into the File Name window lt Esc gt Quit without selecting any files F2 Assemble files After entering all necessary filenames you are ready to press F2 to assemble them together The assembling process does the following operations 1 Scan through every source file and eliminate all occurrence of the EOM flag within each file The EOM flag consists of six consecutive bytes of AA
21. t as a separate file If you want to paste sections of a message together you may use the DOS COPY command as following COPY B file1 file2 file all This command copies file1 file2 together into one file file all However this operation is not the same as the file assembling operation provided in the ROM Data Management function The DOS COPY command simply copy all files together It does not check for and eliminate EOM flags and it does not patch up the destination file with silence to match the EPROM size neither Therefore you should use the COPY command to combines sections together into a single message but not to combine messages together for multi message applications The Speech Editing function makes it possible for you to record a number of messages at once and separate them later For example if you record three messages sequentially into the system memory you may separate them by taking the following steps a Select the Save function and save the recording as a backup copy b Select this function and play the recording Watch the message counter counts up while the recording is being played Write down the counter value when the first message starts to play and also when it finishes This is the start and stop address of the first message Set the start and stop address of the buffer window accordingly and save it C Repeat step B for the other two messages If these three messages are to be used
22. t powerful in the first place EMS memory will make it worse If you have a 8088 or 80286 based PC you should replace it with a 80386 or better computer Equip the computer with at least 4MB of memory 26 Upgrade the DOS to version 5 0 or higher if applicable Add the following two lines to your CONFIG SYS file if they are there already then you already have EMS memory DEVICE C DOS HIMEM SYS DEVICE C DOS EMM386 EXE Here specifies how much memory in kilo bytes should be turned into EMS memory If you have AMB of memory and no other driver is using it you may try 2800 If everything goes well you should see a message on the screen when the computer is booting up telling you how much EMS memory has been installed Otherwise an error message will be displayed If you encounter any difficulties when installing the EMS memory refer to your DOS manual or consult with computer expert PROBLEM 4 All my recordings are silent or very weak but the demo message played fine If you use a microphone to record messages 1 Make sure the microphone is switched on and the battery inside if any is good 2 Adjust the microphone sensitivity pot and try again 3 Check the cable connection The microphone jack is the top one If you use a tape player to transfer messages 1 Check the cable connection The tape jack is the middle one PROBLEM 5 Sound quality is bad It is hard to define bad quality
23. the sampling rate shows a constant 0 0 Kbps the board is not working properly Refer to Chapter 5 Solutions to Common Problems for solutions Otherwise you may start adjusting the sampling rate see A Sample Rate Test for details or press any key to stop the flashing and begin normal operation The screen display is partitioned into the following windows Main Menu Contains a list of available functions Record Play Menu Contains system memory information Speech Editing Menu Contains a list of available commands for speech editing Rom Data Management Menu Contains segment information for multiple message Sample Rate amp Speaker Status Display Shows the sampling rate Kbps and speaker status ON or OFF Main Menu functions are described below Other menus and displays are also described below at appropriate points A Sample Rate Tesi The purpose of the Sampling Rate Test is to provide a continuously updated sampling rate display on the screen so that you know where you are when making sampling rate change You may turn the sampling rate knob at any time to change the sampling rate but only in the Sampling Rate Test will you get an instant feedback of the current sampling rate To adjust the sampling rate choose the Sample Rate Test from the main menu by pressing lt A gt on screen sampling rate display should become flashing Gently turn the sampling rate knob labeled CLK or the only knob on the metal br
24. toring VP 880 files only For example MD VP880 create a subdirectory called VP880 XCOPY A VP880 S copy all files from drive A to VP880 The installation is now completed The following steps are used to test the board to see if the installation is OK TESTING STEP 1 From the directory where the program is stored enter VP880 IRQ where is the IRQ setting 2 5 or 7 If you followed the example in step E above you will have to change directory first CD VP880 change to the VP880 subdirectory A menu should come up shortly Look for a blinking sampling rate display on the lower left part of the screen If it shows 0 0 Kbps then the board is either defective or not installed properly possibly IRQ or I O conflict Otherwise carefully turn the sampling rate knob VR3 and change the sampling rate to about 32 Kbps It may be hard to reach exactly 32 0 Kbps but anything within the 1 Kbps range is acceptable Human ears can hardly tell the pitch difference due to such a small deviation TESTING STEP 2 Select the Load function from the on screen menu Follow the instruc tions and load the demo message file 880DEMO VOC TESTING STEP 3 Select the Play function Follow the instructions to play the demo message If you can t hear the message try adjusting the speaker volume by tweaking the volume control knob labeled VOL It will also help if you double check the speaker cable and make sure it s fi
25. you have just made a new recording it is already in the system memory and you can play it without doing any loading Press D and follow the instructions on screen to play As the playback goes on the Current Byte field in the Record Play Menu will count up showing you the number of bytes currently being played If you don t stop the playback with any key press it will play the full length specified in the Memory Used field and stop by itself E Load Press lt E gt to load a sound file from a hard or floppy disk into the system memory for playback or editing purpose You may specify a full path name such as A TEST VOC or VOICE TEST VOC Note that once the file is loaded into the system memory previous memory contents are totally lost So remember to save your recordings with the Save function before loading a new file After the file is successfully loaded the Memory Used field in the Record Play Menu will show the file length in number of bytes Press F from the main menu to save your recordings to disk The amount of memory saved is always the amount shown in the Memory Used field in the Record Play Menu The file format is Binary which basically means that the file contains only data bytes with neither header information nor checksum bytes You must use this function to save your recordings or they will be lost when you exit the program However this function is not the only function that saves files Ther
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