On Wednesday, July 1, 2015 at 8:37:18 PM UTC-7, Dennis Lee Bieber wrote: > On Wed, 1 Jul 2015 18:49:34 -0700 (PDT), bvdp <b...@mellowood.ca> declaimed > the following: > > > > >Thanks guys. Yes, that is exactly what I want. I have a number of places > >where a MIDI note value is being generated. MIDI should be 0..127, but the > >process creates notes outside the range. Guess that's another question: if > >the value I have is <0 or >127 I add/subtract 12 'til it's in range. Don't > >see using modulo working on this??? > > > >As far as the original question: Yes, that's what I need. At times I need to > >take a note (say 14) and map it into a single octave range. So, the 12 > >becomes 2. Both 14 and 2 are numeric values for note "d", just an octave > >apart. > > > > Modulo will give you the "note", but throws out the octave. > > Your original post specified -50..50, which spans only 101 values, whereas > MIDI spans 128 values -- so what do you really consider out of range? And > what MIDI value is -50 supposed to map against. Is input 0 supposed to > represent middle-C with negative values being notes on the bass clef and > positive values being treble clef? > > MIDI middle-C is note 60. Presuming your 0 is supposed to be middle-C, I'd > do the transformation as: > > midiNote = invalue + 60 > if midiNote < 0: midiNote = midiNote % 12 > if midiNote > 127: midiNote = (midiNote % 12) + 115 > > which actually means input values of -60..+67 are shifted directly to a > midi note number, and values outside of that range are shadowed as the > lowest or highest octave. > > >>> for i in range(-70, 80, 4): > ... midiNote = i + 60 > ... if midiNote < 0: midiNote = midiNote % 12 > ... if midiNote > 127: midiNote = ((midiNote - 5) % 12) + 113 > ... print i, midiNote, "CcDdEFfGgAaB"[midiNote % 12], divmod(midiNote, > 12) > ... > -70 2 D (0, 2) > -66 6 f (0, 6) > -62 10 a (0, 10) > -58 2 D (0, 2) > -54 6 f (0, 6) > -50 10 a (0, 10) > -46 14 D (1, 2) > -42 18 f (1, 6) > -38 22 a (1, 10) > -34 26 D (2, 2) > -30 30 f (2, 6) > -26 34 a (2, 10) > -22 38 D (3, 2) > -18 42 f (3, 6) > -14 46 a (3, 10) > -10 50 D (4, 2) > -6 54 f (4, 6) > -2 58 a (4, 10) > 2 62 D (5, 2) > 6 66 f (5, 6) > 10 70 a (5, 10) > 14 74 D (6, 2) > 18 78 f (6, 6) > 22 82 a (6, 10) > 26 86 D (7, 2) > 30 90 f (7, 6) > 34 94 a (7, 10) > 38 98 D (8, 2) > 42 102 f (8, 6) > 46 106 a (8, 10) > 50 110 D (9, 2) > 54 114 f (9, 6) > 58 118 a (9, 10) > 62 122 D (10, 2) > 66 126 f (10, 6) > 70 118 a (9, 10) > 74 122 D (10, 2) > 78 114 f (9, 6) > >>> > > The oddity for the >127 case is that 127 is not an even octave break point. > divmod() gives you the "octave" and the note. > -- > Wulfraed Dennis Lee Bieber AF6VN > wlfr...@ix.netcom.com HTTP://wlfraed.home.netcom.com/
Thanks. I like your solution for values <0 >127. Makes more sense than mindlessly adding/subtracting 12 to bring into range. In this case I'm just trying to take an out-of-range note to the top/bottom of the valid midi range. -- https://mail.python.org/mailman/listinfo/python-list
