Wdm Recording And Playback Behavior - E-Mu 1212m Owner's Manual

6 - Appendix
Using High Sample Rates

WDM Recording and Playback Behavior

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