I've never got a very clear answer or understanding if it's posible to configure ALSA to output a bit perfect copy of a playing music file (as the only sound playing), no resampling or mixing for supported output sample rates and bit rates. I wouldn't mind it to work like WASAPI in shared mode on Windows Vista and 7 (bit perfect until another application needs to play audio). Would JACK help configure ALSA to do what I'm looking for? What settings do I need to play with to get it do what I want? How well does it resample (downsampling for sample rates and bit rates not supported by hardware) and/or how well does it mix down surround sound to stereo; and how well is the quality of the mixer compared to Windows, Mac, and other Linux (OSS,....) audio sub-systems mixers'? I don't think a computer forum would understand bit perfect output or the point in bothering to set it up and configure it. I think this is the best place for this question, I just hope there is some linux audiophiles in the house. (Even if what I want is shared/mixed mode depending if audio needs to be mixed together [Bit perfect the majority of the time]). Thanks in the advance. P.S. I'm not worried about audio delay/lag, long as the audio memory buffer doesn't have issues (aka keeping 0.25s-1s sound clips and playing back at random intervals randomly. I've had that happened time to time on some slower linux machines when using audactiy. [only when the is no audio being outputed]).