Shifting pitch in a MIDI file?

Ricardo Lameiro ricardolameiro at
Mon Dec 13 14:54:56 GMT 2010

Nice that you found a solution, but it seems to me that you could have  some
problem with sample rates. maybe you are playing a 44.1ks/s in 48kS/s this
could pitch up or the reverse pitchdown. This is often overlook. maybe
someone more experienced on this matter can contribute some ideas in here.


Ricardo Lameiro

2010/12/13 Angel de Vicente <angelv at>

> Hi
> On 13/12/10 13:36, Angel de Vicente wrote:
> > Hi,
> >
> > On 13/12/10 13:13, Ralf Mardorf wrote:
> >> Add a track and send Pitch to all channels, but note, that the steps for
> >> the Pitch Wheel are defined by the synth e.g. 0 or 2 or 12 semi
> >> steps ;). MIDI does also know a master tune, but this isn't supported by
> >> every synth. You might have not an issue for the sample rates, regarding
> >> to the bad tuning, I once had this too. I did a new install and the
> >> tuning was ok.
> >
> > You mean add a track and send the pitch (from the virtual keyboard) to
> > it? I've never done anything like this, so if you have pointers to
> > documentation that I can read in order to do this sort of thing I would
> > be grateful.
> >
> In the end, changing the software synthesizer to ZynAddSubFx instead of
> QSynth seems to do the trick, since it has options to do a Glogal or a
> per-instrument keyshift, plus a fine tune/detune knob, with an
> integrated keyboard to test the exact tuning in Hz, so I think this
> should be fine.
> Cheers,
> Ángel de Vicente
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