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WDM Recording and Playback Behavior<br />
WDM recording and playback is supported at all PatchMix sample rates. The behavior<br />
of the driver with respect to PatchMix sample rate is described below.<br />
When PatchMix and the WDM audio content (.WAV file format, playback and record<br />
settings in WaveLab. etc.) are both running at the same sample rate, and when a Wave<br />
strip or send is present in the PatchMix mixer configuration, WDM audio will be played<br />
or recorded “bit accurate” without sample rate conversion or bit truncation.<br />
When running PatchMix at 44kHz/48kHz, if there is a mismatch between the WDM<br />
playback audio content and the PatchMix sample rate, sample rate conversion is<br />
performed, so that WDM audio will always be heard or recorded. Also, such nonnative-sample-rate<br />
audio is truncated to 16-bits.<br />
When running PatchMix at the higher sample rates of 88.2kHz, 96kHz, 176.4kHz or<br />
192kHz, WDM record or playback audio content must be running at the same sample<br />
rate as PatchMix. If the sample rates are mismatched, NO AUDIO will be produced or<br />
recorded. In other words, the WDM driver does not perform sample rate conversion of<br />
any kind when PatchMix is running at 88.2kHz, 96kHz, 176.4kHz or 192kHz.<br />
6 - Appendix<br />
Using High Sample Rates<br />
E-MU PCI Digital Audio Systems 113
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