[linux-audio-user] Pulling off old 2-track reels and trying to slow them down

Wolfgang Woehl tito at rumford.de
Tue Apr 26 04:24:15 EDT 2005


Jesse Chappell <jesse at essej.net>:
> On Sun, 24 Apr 2005, Alan Taylor wrote:
> > On Sun, 2005-04-24 at 19:16 +0200, Wolfgang Woehl wrote:
> > > Alsaplayer sounds crap in varispeed. I'd use Ardour for slowing
> > > things down as it uses libsamplerate for that purpose. In the
> > > Mixer strip,
> >
> > You are correct.  While the results are still not ideal (due to the
> > original sample rate of 48KHz), the overall quality surpasses what
> > I got out of alsaplayer.  Thanks.
>
> Actually, for the real-time varispeed, ardour does *not* use
> libsamplerate, but a handcrafted linear interpolation from Steve
> Harris.  This is also unsuitable for high quality archival work.
>
> If you can use ardour or alsaplayer to estimate the exact amount
> of resampling you need, you can then use:
>
>      sndfile-resample -by <amount_ratio> infile.wav  outfile.wav

Jesse, thanks.
Wolfgang




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