[PlanetCCRMA] Ardour changing pitch

[Stephen Crane]

On Wednesday 30 November 2005 09:49, Jan Depner wrote:
> On Wed, 2005-11-30 at 13:36, Fernando Lopez-Lezcano wrote:
> > On Wed, 2005-11-30 at 11:14 -0800, Stephen Crane wrote:
> > > I've been having trouble with Ardour changing the pitch of my tracks
> > > after I save, shut down the computer and come back to it a week or so
> > > later.
> > >
> > > First I recorded about a dozen tracks. When I came back to this project
> > > a week or so later, all the tracks had gone a little over a half step
> > > flat, but they were all in tune with each other. So I re-recorded my
> > > tracks, leaving the old, out-of-tune ones alone. When I came back a
> > > couple of weeks later, the newer tracks were out of tune (flat), again
> > > all by the same amount, but the old tracks that were out of tune
> > > before, were now perfectly in tune.
> > >
> > > Here's my specs:
> > > Fedora Core 2 - CCRMA Edge kernel
> > > Latest updates from CCRMA (a couple of days ago)
> > > M-Audio Delta 410 (PCI card)
> > > Sample Rate - 44100
> > >
> > > Any ideas on what could be causing this? I've searched all over, but
> > > the only thing I found even close to this problem was this post:
> > > http://ccrma-mail.stanford.edu/pipermail/planetccrma/2005-July/009835.h
> > >tml but it doesn't appear to be the same problem to me.
> >
> > This sounds to me like a mismatch at some point in sampling rates (44100
> > vs. 48000). Hard to say _how_ exactly it happens - but at the core of
> > the problem you will probably find something like that happening.
> >
> > 48000/44100=1.0884353...
> > 1/2 step in a 12 tone equal tempered scale = 1.059463...
> > -- Fernando
>
>     This is what I expect is happening as well.  Run envy24control and
> make sure you are set to 44100 when recording.  It's the Master Clock
> setting in the Hardware Settings tab.

Thanks, that's exactly the case, it was set to 48000. Thanks so much.

- Stephen