Re: Quality of CoreAudio SRC
Re: Quality of CoreAudio SRC
- Subject: Re: Quality of CoreAudio SRC
- From: "Mikael Hakman" <email@hidden>
- Date: Thu, 31 Jan 2008 23:30:52 +0100
- Organization: Datakonsulten AB
On January 31, 2008 8:54 PM Brian Willoughby wrote:
...I have long planned on developing a sample-
rate following player.
I have long been missing such a rate following player that could be used
with today's best audio interfaces which include but are not limited to
Benchmark.
On January 31, 2008 Stephen Davis wrote:
IMHO, it is bad form to be changing the audio hardware's sample rate
for each track. If you're gunning for the absolute highest quality
output then maybe it's okay but it's pretty obnoxious to the rest of
the system and should be clearly communicated to the user.
Would you or other knowledgeable member on this thread kindly explain why
rate-following would be bad, in absence of other rate-locking signals such
as digital input or word clock etc., please?
Why couldn't e.g. iTunes send the actual sample rate information down the
chain of software layers until it arrives to the hardware (DAC)? The sample
rate would need to be changed only when the rate used by the actual track is
different from previous. I have been discussing this with few audio
interface vendors. While they agree that not doing SRC would be the best,
they blame on application and operating system vendors for not providing
sample rate information to their drivers/hardware.
For a user it is difficult if not impossible to keep track of what sample
rate a selected media is in, then use a control panel or Preferences or both
to change the rate, and first then to play the track. Many users want to
simply select a track, perhaps in Front Row using a remote control from the
couch, and play it, or even play a number of randomly selected tracks. Why
can't we give even these users the best audio quality available on the
system?
Mikael Hakman
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