[PlanetCCRMA] Ardour changing pitch

Jan Depner eviltwin69@cableone.net
Wed Nov 30 14:35:03 2005

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.html
> > 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.

Jan "Evil Twin" Depner
The Fuzzy Dice

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