Forums > MaxMSP

Controlling frequency with slider in MSP

Oct 06 2009 | 9:42 pm


I’m working on a modular-synth build in MAX/MSP. I want to control frequency with a knob or slider and am trying to find a way to constrain the values similar to the relative amplitude calculation used in Tutorial Four that changes integers from the slider into decibals. The slider only gives values from 1 to 127 and I want to convert to Hertz. Any ideas on this would be great.

If anyone else is working on any sort of synth builds in MSP, I would be interested in messaging with them.



Oct 06 2009 | 9:47 pm

I think that [mtof] will be your friend. It will turn midi values into the related frequencies in hertz.


Oct 06 2009 | 9:52 pm

Oct 07 2009 | 12:31 am

0. – 1. to frequency:

[* 127]


[expr (440.*exp(0.057762265*(($f1*127)-69.)))]

0. – 1. to db/A:

[expr max((log10($f1)*20),-90.)]

numberfully yours


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