There is some more on new audio features in Vista and 7 here. See Help > Audio Device Info in Audacity to view the sample rates your device claims to support.
So if you choose a project rate bottom left of Audacity that is compatible with your sound device, you shouldn't get resampling distortion or speed problems that can happen if you use MME. The benefit of "exclusive control" is that no resampling is done in Windows. However DirectSound on Vista/7 does allow Audacity to use the new "exclusive mode" to take exclusive control of the sound device if this is set at "Sound" in the Windows Control Panel. On Vista and 7, DirectSound is unlikely to have much less latency because of the emulation. On faster machines running XP or earlier, Direct Sound should have significantly less latency than MME.
#Mme vs wdm full
However Audacity can't take full advantage of WASAPI features yet because it still goes through MME or DirectSound, which are emulated on top of WASAPI.Īs to which you should use, MME is default and the "safest" choice, especially on old machines. That has an "exclusive mode" that provides the low latency direct access to the sound device that kernel streaming does on pre-Vista systems. Since that article was written, Vista and 7 have appeared with a new WASAPI API.
#Mme vs wdm manual
Have you looked in the Manual ? Also there is an article here that gives you some basics though it's now out of date.
MME and Windows DirectSound are audio API's.
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