Echo Gina3G Owner's Manual

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Appendix E: PureWave and SuperChannel55Appendix E: PureWave and SuperChannelPureWave versus WDMWith the WDM driver, you can run each wave device in either WDM mode orPureWave mode. Here’s a chart explaining the differences between the two.WDM wave PureWaveAudio data may be resampled,dithered, or otherwise modifiedAudio data is sent to the hardwareunchangedNot all 24 bit applications aresupportedAll 24 bit applications are supported30 milliseconds of latency added forboth playback and recordLatency may be adjusted to best suityour machine.Note that this only applies to software that uses the wave/MME API tocommunicate with audio hardware. Applications that use other APIs, such asASIO or GSIF, do not benefit from PureWave as they already enjoy a directconnection to the hardware.Despite all this, you may still wish to use WDM mode. There are applications,most notably Cakewalk’s SONAR, that take advantage of WDM KernelStreaming. WDM Kernel Streaming allows the application to bypass the kernelmixer; in that case, you should definitely use WDM mode.Surround sound playback applications such as WinDVD or PowerDVD should usethe WDM mode; see below for details.Please note that under PureWave mode, DirectSound is not supported.PureWave only works in Windows 2000 and Windows XP.