Subject: Re: Proposal: Audio: Sampling rate conversion
To: Wojciech Puchar <wojtek@chylonia.3miasto.net>
From: Lennart Augustsson <lennart@augustsson.net>
List: tech-kern
Date: 03/05/2002 10:24:46
Wojciech Puchar wrote:
> 
> > > 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.
> 
> possibly - i'm not sure now.
> 
> > 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,
> 
> IMHO this is not important as it make problem only in >20kHz range which
> almost noone hear
The simple linear interpolation filter will produce lots of audible
artefacts when converting from 44.1 <-> 48.

-- 

	-- Lennart