CC Week 2 - MIDI n to freq
With the assistance of your function from the previous week create a control structure that generates the entire MIDI note range of frequencies. The code will build and print an array that contains note name, octave number, MIDI note number and frequency.(
// build a table of note names
var table = ();
value
{
var semitones = [0, 2, 4, 5, 7, 9, 11];
var naturalNoteNames = ["c", "d", "e", "f", "g", "a", "b"];
(0..9).do
{
arg o;
naturalNoteNames.do
{
arg c, i;
var n = (o + 1) * 12 + semitones[i];
table[(c ++ o).asSymbol] = n; table[(c ++ "s" ++ o).asSymbol] = n + 1; //determine sharp
table[(c ++ "ss" ++ o).asSymbol] = n + 2; //determine double sharp
table[(c ++ "b" ++ o).asSymbol] = n - 1; //determine flat
table[(c ++ "bb" ++ o).asSymbol] = n - 2; //determine double flat
};
};
};
"Pitch class and Octave Number, MIDI Note Number, Frequency Value" .postln;
a = table.atAll (#[a4].postln).postln;// Creates MIDI Note number --Enter Pitch class and Octave number here.
a = 2**((a-69)/12) *440; //Coverts MIDI note number to frequency value
)
__________
[1] Christian Haines. "Creative Computing: Semester 1, Week 2. Introduction (2)" Lecture presented at EMU, University of Adelaide, South Australia, 08/03/2007.
posted by Daniel Murtagh @ 15:01
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