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# 
# MIDI player by MikroTourette 2017
# with enhancements by jgro 2022
# local notes section by lirion 2022
#
# notes is array of MIDI notes with optional length: note/length
# Length is number of ticks. If omitted, length will be set to $defaultTicks.
# Use 0 for rests.
:local notes 62/8,60/8,58/8,57/8,67/8,58/8,65/8,63/8,65/16,67/8,63/8,62/4,63/4,62/4,60/4,62/8,55/8,62/8,60/8,58/8,57/8,67/8,58/8,65/8,63/8,65/16,67/8,63/8,62/16,62/8,55/8,62/8,60/8,58/8,57/8,67/8,58/8,65/8,63/8,65/16,67/8,63/8,62/4,63/4,62/4,60/4,62/8,55/8,62/8,60/8,58/8,57/8,67/8,58/8,65/8,63/8,65/16,67/8,63/8,62/16,62/8,55/8,62/32,70/16,67/16,69/24,70/8,69/32,62/32,67/16,65/16,69/48,63/8,60/8,62/32,70/16,67/16,69/24,70/8,69/32,67/32,65/16,63/16,62/56,0/8;

# Tempo
# Because clock resolution is only 10ms, you need much longer ticks than standard MIDI
:local tick 50ms;      # length of a tick
:local defaultTicks 4; # default number of ticks for a note
:local stacc 10ms;     # length of break between notes
:local transpose 0;    # number to add to or subtract from each note (12 is 1 octave)

# MIDI player
# Frequencies from C9 (MIDI 120) through B9 (beyond MIDI top note of 127)
:local frqtab 8372,8869,9397,9956,10548,11175,11839,12543,13288,14080,14916,15804;
:local n0; :local n;
:local d0; :local d;
:local l;
:local midi;
:local i;
:local octa;
:local frq;
:local tones;
:local durations;
:for i from=0 to= ([:len $notes]-1) do={
  :local entry [:pick $notes $i];
  :local div [:find $entry "/"];
  :if ([:typeof $div] = "nil") do={
    :set tones ($tones, $entry);
    :set durations ($durations, $defaultTicks);
  } else={
    :set tones ($tones, [:pick $entry 0 $div]);
    :set durations ($durations, [:pick $entry ($div + 1) [:len $entry]]);
  }
}
  
:for i from=0 to= ([:len $notes]-1) do={
  :set midi [:pick $tones $i];
  :set midi ($midi + $transpose);
  :set octa 0;
  :while ($midi < 120) do={:set midi ($midi + 12); :set octa ($octa + 1); };
  :set midi ($midi % 12);
  :set frq [:tonum [:pick $frqtab $midi]];
  :set frq ($frq>>($octa));
  :set d0 [:pick $durations $i];
  
  :set d ($d0 * $tick );
  :set l ($d0 * ($tick - $stacc));
  # :put $midi;
  # :put $frq;
  # :put $octa;
  if ($frq >= 20) do={
    :beep frequency=$frq length=$l;
  }
  :delay $d;
}