Echo Audio Mona Manual download pdf (Page 5)

PureWave versus WDM

With the WDM driver, you can run each wave device in either WDM mode or PureWave mode.

Here’s a chart defining the differences between the two.

Note that this only applies to software that uses the wave/MME API to communicate with audio

hardware. Applications that use other APIs, such as ASIO or GSIF, do not benefit from

PureWave as they already enjoy a direct connection to the hardware.

For a list of what applications can benefit from PureWave, please refer to the next section.

WDM wave PureWave

Audio data may be resampled, dithered, or

otherwise modified

Audio data is sent to the hardware unchanged

Not all 24 bit applications are supported All 24 bit applications are supported

30 milliseconds of latency added for both

playback and record

Latency may be adjusted to best suit your

machine.

Despite all this, you may still wish to use WDM mode. There are applications, most notably

Cakewalk’s SONAR, that take advantage of WDM Kernel Streaming. WDM Kernel Streaming

allows the application to bypass the kernel mixer; in that case, you should definitely use WDM

mode.

Surround sound playback applications such as WinDVD or PowerDVD should use the WDM

mode; see below for details.

Please note that under PureWave mode, DirectSound is not supported.

PureWave works on Windows 2000 and Windows XP.

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Echo Audio Mona Manual Page 5