[PD] db and pd

Marc Lavallée marc at hacklava.net
Sun May 22 20:17:39 CEST 2005

Le 22 Mai 2005 05:14, IOhannes m zmölnig a écrit :
> it just turned out to work very simply and intuitively when using
> midi-dB (i prefer to refer to pd's dB as such) with quite everything
> (this is: human perception, 16bit audio and MIDI)

For those not using MIDI (which I believe is the case of most PD users), 
midi-dB is not that intuitive... And I don't see any reference about 
midi-dB in Miller's book. I can believe that midi-dB is handy and make 
sense, but I used MIDI and I don't understand your explanation (and the 
conversion pseudo code).

If 128 values are used to control a 0-100 dB range, it means that the 
midi-dB resolution is 0.78 dB. For 16 bits audio, the range is 0-96 dB, so 
the midi-dB resolution is 0.75. For 24 bits audio, the range is 0-144 dB, 
so the midi-dB resolution is 1.125 dB. Is that correct?

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