At Mon, 4 Mar 2002 18:06:44 +0100 (CET),
Wojciech Puchar wrote:
> 
> > Subject: Re: Proposal: Audio: Sampling rate conversion
> >
> > This is probably a reasonable compromise for going in to the
> > kernel since it is efficient.  It leads to rather poor audio
> > quality though, so we might consider more complicated filters
> > in the future.
> 
> in case of 44100=>48000 or 48000=>44100 you wan't probably hear the
> difference as average adult can't hear more than 16kHz.
> 
> but in case of 8000=>44100 or 8000=>48000 it would sound terrible!!!!!
> for example 1000Hhz sound with produce mix of 1000,5000,9000,13000,17000
> and 21000 Hz sound. and you WILL hear it.

This is 1000, 7000, 9000, 15000, ..., if my memory is correct.
Implementing a good rate converter would be an exercise of digital
filter design, but I don't think this needs to be done now.

Personally, I would care about high quality 44.1k <-> 48k conversion,
but I don't want to read a book of digital filter right now.

--
IWAMOTO Toshihiro