[PD] midi to freq equation

Cyrille Henry cyrille.henry at la-kitchen.fr
Mon Sep 23 18:46:22 CEST 2002

440 * 2^((x-69)/12) 

x is the midi note 
69 is the midi root note and 440 is the frequency of this note.


----- Original Message ----- 
From: "Mark Khemma" <mkhemma at orion.it.luc.edu>
To: <pd-list at iem.kug.ac.at>
Sent: Monday, September 23, 2002 6:24 PM
Subject: [PD] midi to freq equation

> Sorry guys/gals
> I know that this equation has be spout out before, but. . could
> someone please give me the equation for miditofreq, please?
> I know it has 2^(1/12) somewhere, but.. .
> My main reason for wanting to know this is that i'd like to do something
> like a mtof but the 12 tone equal temperment could be changed to some
> specific value (eg 13 tone, 76 tone, you get the idea). it would be an
> interesting way to study different modes (they call it modes right?)
> anywayz, thanks,
> mark.k
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