Hi,
Its been a few months since I wonder what would be the algorithm to write an signal's "pitch changer" in Pd. I searched the archives, but I cant find any message about an octaver or a pitch changer. This can be done easily with requencies, but what about signals ? Would it be possible simply using expr~ ? Maybe I need to review my maths...
Thanks!!
aalex
pd/doc/3.audio.examples/G09.pitchshift.pd
Alexandre Quessy wrote:
Its been a few months since I wonder what would be the algorithm to write an signal's "pitch changer" in Pd. I searched the archives, but I cant find any message about an octaver or a pitch changer.
i am still yet to hear a good way to change pitch in realtime.
if you use one of these delayline pitch shifters (like in the .doc) , it's going to end up sounding like a stick being run across a wire fence.
and if you use some sort of pitch vocoder (fourier transformation), it sounds a lot more soft and human, but still has that 'wrapped in thick plastic' effect
Le Samedi 27 Août 2005 06:21, hard off a écrit :
i am still yet to hear a good way to change pitch in realtime.
if you use one of these delayline pitch shifters (like in the .doc) , it's going to end up sounding like a stick being run across a wire fence.
and if you use some sort of pitch vocoder (fourier transformation), it sounds a lot more soft and human, but still has that 'wrapped in thick plastic' effect
Does the "phased locking vocoder" example in "doc/4.fft.examples" also sound like plastic to you? I like it...
These fft techniques require a lot of computing power. There's a patch forfor fftw3, but I never tried it: http://lists.puredata.info/pipermail/pd-announce/2004-02/000506.html https://sourceforge.net/tracker/?func=detail&atid=478072&aid=1055258...
-- Marc
These fft techniques require a lot of computing power. There's a patch forfor fftw3, but I never tried it: http://lists.puredata.info/pipermail/pd-announce/2004-02/000506.html https://sourceforge.net/tracker/?func=detail&atid=478072&aid=1055258...
the fftw3 support is in devel since more than one year ... more than 2 times faster than the mayer fft used by miller ...
t
The Octave Divider in the examples seems to be a frequency shifter (like the Bode) but it would be fun to build a Octaviator/Octaver like the guitar/bass pedal fx, although it qualifys as the least natural sounding pitching device. Its a frequency divider and the results are naturally rectangular waveforms which sounds in most cases terrible but sometimes interesting timbres show up.
Cheers,
Malte
Malte Steiner media art + development -www.block4.com-
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Alexandre Quessy -
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hard off -
Malte Steiner -
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