Shift every mode by a constant factor of an audio signal

Question

Is there any tool for linux which can shift every frequency of the spectrum of a sound signal by a constant factor and output the resulting sound?

Especially I am looking for a way to simulate the Doppler effect for sound wave.

If you want to simulate the Doppler effect you probably want to change frequency by a constant factor (i.e. multiplication, not addition). Probably what you meant, but it never hurts to be explicit.
Is there also a command line solution such that I can write a simple wrapper script which takes as argument the speed of a moving source?
You might want to migrate this to audio.stackexchange.com as this is on-topic there
@Rory Alsop Ok, I didn't know audio.stackexchange.com - so you are right. However I don't know how to migrate it, so feel free to do it.

RedGrittyBrick · Accepted Answer · 2011-06-22 15:50:45Z

up vote 2 down vote accepted

Audacity's effects menu has a change pitch option

answered Jun 22 '11 at 15:50

RedGrittyBrick
78729

	Does this change every frequency by a multiplicative factor or by an additive one? – student Jun 22 '11 at 21:53
	Ok, if I use `Percent Change` it seems to be multiplicative! Thanks! – student Jun 23 '11 at 8:16

1 Answer