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work on the proper quantizer

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This commit is contained in:
Weird Constructor 2021-08-26 05:01:22 +02:00
parent 88228ebb46
commit ce574c7243
1 changed files with 73 additions and 28 deletions
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101
scripts/pitch_quantize_prototype.wl
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@ -35,35 +35,80 @@ std:displayln :pitch2note " "~ pitch2note f;
std:displayln :note2f " "~ note2f ~ pitch2note f;
std:displayln :p2f " "~ p2f f;
# gets the index in the 24 half semitone array
!get_note_idx = {
std:num:floor ~ (_ % 0.1 + 0.1) * 240.0
!eucDiv = {
!a = int _;
!b = int _1;
!div = a / b;
!mod = a % b;
if mod < 0 { .div -= 1; };
div
};
std:displayln :for674_12 ~ note2f (67.4 - 12.0);
std:displayln :for674_12 ~ get_note_idx ~ note2f (67.4 - 12.0);
# gets the index in the 24 half semitone array
!get_note_idx = {
!num = _ * 240.0; # twice the resolution, for quater notes and a more even quantization
!r = int ~ std:num:floor num;
!o = eucDiv r 24;
.r -= o * 24;
std:displayln ~ $F " in={:8.5} r={:2} o={:2}" _ r o;
r
};
std:displayln :for675_12 ~ note2f (67.5 - 12.0);
std:displayln :for675_12 ~ get_note_idx ~ note2f (67.5 - 12.0);
std:displayln :for68 " " ~ note2f (68.0 - 12.0);
std:displayln :for68 " " ~ get_note_idx ~ note2f (68.0 - 12.0);
std:displayln :for679 " " ~ note2f (67.9 - 0.0);
std:displayln :for679 " " ~ get_note_idx ~ note2f (67.9 - 0.0);
std:displayln :for69_115 ~ note2f (69.0 - 11.5);
std:displayln :for69_115 ~ get_note_idx ~ note2f (69.0 - 11.5);
std:displayln :for69_12 "" ~ note2f (69.0 - 11.5);
std:displayln :for69_12 "" ~ get_note_idx ~ note2f (69.0 - 11.5);
std:displayln :for69 " " ~ note2f (69.0 - 0.0);
std:displayln :for69 " " ~ get_note_idx ~ note2f (69.0 - 0.0);
std:displayln :for69+114 ~ note2f (69.0 + 11.4);
std:displayln :for69+114 ~ get_note_idx ~ note2f (69.0 + 11.4);
# std:displayln :for674_12 ~ note2f (67.4 - 12.0);
# std:displayln :for674_12 ~ get_note_idx ~ note2f (67.4 - 12.0);
#
# std:displayln :for675_12 ~ note2f (67.5 - 12.0);
# std:displayln :for675_12 ~ get_note_idx ~ note2f (67.5 - 12.0);
#
# std:displayln :for68 " " ~ note2f (68.0 - 12.0);
# std:displayln :for68 " " ~ get_note_idx ~ note2f (68.0 - 12.0);
#
# std:displayln :for679 " " ~ note2f (67.9 - 0.0);
# std:displayln :for679 " " ~ get_note_idx ~ note2f (67.9 - 0.0);
#
# std:displayln :for69_115 ~ note2f (69.0 - 11.5);
# std:displayln :for69_115 ~ get_note_idx ~ note2f (69.0 - 11.5);
#
# std:displayln :for69_12 "" ~ note2f (69.0 - 11.5);
# std:displayln :for69_12 "" ~ get_note_idx ~ note2f (69.0 - 11.5);
#
# std:displayln :for69 " " ~ note2f (69.0 - 0.0);
# std:displayln :for69 " " ~ get_note_idx ~ note2f (69.0 - 0.0);
#
# std:displayln :for69+114 ~ note2f (69.0 + 11.4);
# std:displayln :for69+114 ~ get_note_idx ~ note2f (69.0 + 11.4);
iter f $[
$[10, 0, 0],
$[-10, 0, 0],
$[0, 1, -11],
$[0, 1, 6],
$[0, 1, 0],
$[0, -11, -5],
$[0, -1, 0],
# $[0, -1, 0],
# $[0, -1, -1],
# $[0, -1, 1],
# $[-1, -1, 0],
# $[-1, 1, 0],
# $[1, -1, 0],
# $[1, 1, 0],
# $[2, -1, 1],
# $[2, 1, 1],
$[2, -11, 0],
$[2, 11, 0],
$[-9, -1, 0],
] {
!num =
float[f.0] * 0.1
+ (float[f.1] / 120.0)
+ (float[f.2] / 1200.0);
#-0.2, -0.3, -0.4, -0.5, 0.2, 0.3, 0.4, 0.5, -1.0, 1.0] {
std:displayln ~
$F "o={:2} n={:2} c={:2} | {:6.3} => {:3}"
f.0 f.1 f.2 num (get_note_idx num);
std:displayln[];
};
# Taken from VCV Rack Fundamental Modules Quantizer.cpp
# Under GPL-3.0-or-later
@ -74,9 +119,9 @@ std:displayln :for69+114 ~ get_note_idx ~ note2f (69.0 + 11.4);
#
# for (int c = 0; c < channels; c++) {
# float pitch = inputs[PITCH_INPUT].getVoltage(c);
# int range = std::floor(pitch * 24);
# int octave = eucDiv(range, 24);
# range -= octave * 24;
# int range = std::floor(pitch * 24); // 1.1 => 26
# int octave = eucDiv(range, 24); // 26 => 1
# range -= octave * 24; // 26 => 2
# int note = ranges[range] + octave * 12;
# playingNotes[eucMod(note, 12)] = true;
# pitch = float(note) / 12;