Pitch and Speed change in real time separately?

May 23, 2012 at 12:40am

Pitch and Speed change in real time separately?

Hello, does anyone know a good way to achieve changing the pitch and speed in real time, but separately? I’m planning to control them with 2 input devices (iphones wirelessly with the c74 object) Thanks!

May 23, 2012 at 3:52am

Timo’s Grainstretch~ and DiraclE~ externals would be a good start. http://cycling74.com/forums/topic.php?id=37749

May 23, 2012 at 9:08am

does ‘in real time’ mean live audio input? Cos ya can’t vary speed in real time!! Only retrospectively; and pitch modulation will also introduce some latency, as frequency is a function of time. That said, granulation may well be the way to go, but consider a delay line as well.


May 23, 2012 at 2:20pm

GMEM’s bufgranul~ and livegranul~ are worth trying too.

May 23, 2012 at 6:04pm

[gizmo~] and [sig~] with appropriate locking back and forth as to whether the values affect each other:

change pitch only: gizmo~ value changes
change speed and pitch, locked: change sig~ only
to change speed without changing pitch: value for sig~ –> [!/ 1.] (reciprocal) –> value for gizmo~

so for example, 2.0 speed –> 0.5 pitch (drop an octave, back to original pitch)

only sounds good for a limited range depending on the fft~ size, but that’s a limitation of any pitch-shifting.

extreme values in one or both of these can sound pretty awesome…


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