[PD] Acoustic conversions : formulas?

David Sabine dave at davesabine.com
Fri Jul 19 00:48:26 CEST 2002

Hello all,

Can somebody tell me what formula is used in PD to convert MIDI to frequency?  (i.e. how does [mtof] REALLY work?)

Is it a table? or a formula?

By the same token, I'd like the formulae for [ftom], [dbtorms], [rmstodb], [dbtopow], and [powtodb] as well.

Dave Sabine
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