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Computer audio and sample rate issues are popping up
everywhere, driven by the desire for high quality audio on PC’s finally.
On Windows and Mac’s its even harder to get it right. In Alsa (and PC audio architecture in general) the system
has a default sample rate, usually set by the driver it seems, and usually 48
KHz. Normally all the audio is resampled to this rate to permit mixing audio
from different sources (the system alert noises with your MP3 playback for
instance). However for those of us trying to get very high quality audio out of
the PC it’s possible to get the driver, the audio player and the card to
cooperate and play the stream at its original “bit perfect’ sample
rate. It requires alignment of the audio player app (Xine in my case), Alsa,
the driver for the card (the latest version of the Juli@ driver) and it all
seems to work right after many hours of “tweaking”. I have NOT played with USB audio. For 44.1 and 48 it should
be pretty straightforward, the higher sample rates will require chip/card
specific drivers something never easy on Linux. On a Mac you pretty much go deep into the system and set the
sample rate for the whole system and change it for every change in source rate.
On a PC you don’t want Demian Martin Product Design Services |
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