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In Reply to: Wait a minute here... posted by Presto on March 6, 2007 at 11:06:56:
Hey Presto - I tried the DTS test one time with a Sony Vaio laptop and an M-Audio Transit (hooked up to a Denon receiver). I played a DTS file with WMP 10 and lo & behold it worked. Just for fun I found out what happens when I drop the volume to less than 100% - that blast of pink noise you were talking about. So when you test, make sure all your pc volume controls are set to MAX.So you *can* get 16/44 out of kmixer. I think it is a false rumor that the kmixer always resamples to 16/48. But it probably depends on what device you are using.
BTW, the Sony laptop probably had the Intel HD-Audio spec, but I'm not sure what difference that makes since I was not using onboard audio.
Follow Ups:
The Transit is not using the system provided USB audio driver and the custom M-audio driver is known to bypass kmixer.Cheers
nt
I've encountered a similar situation. I was able to get HDCD playback with MP10 and also Itunes (6.0 ?) With each player, I lost HDCD lock when lowering the media players volume. This was with my old Terretec 2496. Can't make the same happen anymore with my EMU 0404.Greg
Apparently if your device driver advertises itself as having a "hardware mixer" and promises to be compliant to AC97, Windows will let it do the mixing instead of using kmixer.For example, my Audiotrack Prodigy 7.1 will play back DTS files fine, because it *has* a hardware mixer. I think this is also the case for some of the other soundcards based on the Via Envy chipset.
The reason why this discussion is interesting is because the Benchmark USB DAC claims to use generic XP USB drivers, which (I think) do not register as having a hardware mixer to the OS.
PS - a clever idea would be to claim to have a hardware mixer even if you don't, and implement software mixing in the device driver.
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