Technical information

Appendix C. Additional Information for Mwave DSP Feature
Note:
In some countries, the Mwave
telephony functions are available
only after the DAA/Telephony Kit
option is installed.
This appendix provides detailed information about the ThinkPad
Mwave DSP Features.
Audio Information
This section provides information about the ThinkPad audio features.
Sound
The Mwave DSP features provide support for Windows Version 3.11
audio applications that comply with the Windows MultiMedia
Extensions (MME) for audio, for example, Windows Sound Recorder
and Windows Media Player that are shipped with Windows Version
3.11.
In general, recording audio music and speech at higher quality
requires more disk storage. The following table shows some typical
values for various sampling rates:
Sample
Rate
Sample
Size
Frequency
Range
Signal/Noise
Ratio
Remarks
44.1 KHz 16 bits 20 Hz — 20
KHz
80 dB CD quality
22.05 KHz 16 bits 20 Hz — 10
KHz
80 dB < CD quality
11 KHz 16 bits 20 Hz — 5
KHz
80 dB AM quality
9.6 KHz 14 bits 200 Hz — 4
KHz
60 dB Toll quality
8.0 KHz 8 bits 200 Hz — 4
KHz
60 dB Toll quality
Copyright IBM Corp. 1995 243