User Manual

OSMAC BaseOSMAC Base User Manual
Page 47
15 Appendix C - "Voice Prompt" Technical Details
Voice prompt files are linked with the OSMAC BaseOSMAC Base object code as the final part of the build process. Voice
prompts of any language or any speaker's voice may easily be incorporated.
Voice prompt files must be recorded in the following formats:
1. File Format: .wav
2. Encoding Format: PCM
3. Bits Per Sample: 8
4. Mode: Mono
5. Amplitude: Amplitude should be adjusted so voice peaks are about 75% full scale
6. Equalization: Bandpass filtering of the audio from 300 Hz to 4 KHz prior to recording
is recommended
The following voice file names are used, with the given function and sample rates:
• callend.wav Call ended 22 KHz
• callext.wav Call extended 22 KHz
• dialtone.wav Dial tone 11 KHz
• ent_err.wav Entry error 22 KHz
• msgdeliv.wav Message delivered 22 KHz
• null.wav zero length null file
• pagermsg.wav Enter pager message 22 KHz
• pagernum.wav Enter pager number 22 KHz
• phtimeo.wav Phone timeout 22 KHz
• sine300.wav 300 Hz sine wave 11 KHz
• sine1k.wav 1 KHz sine wave 11 KHz
• talknow.wav Prompt user to talk 22 KHz
• timeout.wav Timeout error 22 KHz
The following additional files are used:
• language.txt Text file containing the name of the language