Product manual

Copyright © 2003 Echo Digital Audio Corporation. All Rights Reserved.
WDM - PureWave
What is PureWave?
While the Windows WDM audio architecture is fine for consumer applications such as games and
watching DVDs, it is not entirely suitable for professional audio applications. PureWave is an
exciting new feature that gives your audio applications a more direct connection to Echo
hardware, allowing your audio data to pass through unmodified.
Here’s a diagram to illustrate the difference:
WDM PureWave
As you can see from the diagram, PureWave mode completely bypasses the Windows kernel
mixer to deliver your audio data directly to the hardware.
Aud
io
Application
Microsoft
WDM wave
driver
Microsoft
Windows
kernel mixer
Echo24
WDM driver
Echo
hardware
Audio
Application
Echo
PureWave
driver
Microsoft
Windows
kernel mixer
Echo24
WDM driver
Echo
hardware