# This demonstrates Alda's ability to automatically assign MIDI channels for
# each part in a score, even if there are more parts than there are available
# channels.
#
# In the MIDI spec, there are 15 non-percussion channels and 1 percussion
# channel.
#
# As long as there aren't more than 15 non-percussion parts that have notes at
# the same time, Alda will automatically find a channel for each note, switching
# to a free channel if necessary.

(tempo! 180)

################################################################################
# Planning notes:
#
# Bm7, Bbm7, Am7, D13b5b9 (Ab - Eb - C - F# - B)
#
# 1-3.   bass         (B, Bb, A, Ab)        2 quarter notes per note
# 4-6.   harm 1       (A, Ab, G, Eb)        1 half note per note
# 7-9.   harm 2       (D, Db, C, C)         ""
# 10-12. harm 3       (F#, F, E, (F# / B))  ""
# 13-15. counterpoint
################################################################################

bass = b2 b- a a-
harmA = a2 a- g e-
harmB = d2 d- c c
harmCa = f+2 f_ e f+
harmCb = f+2 f_ e b
counterA = r4 f+6 r12 r6 f12   r4 e6 e12 r6 f+12~4 r4
counterB = r4 b6  r12 r6 b-12  r4 a6 a12 r6 b12~4 r4
counterC = r4 d6  r12 r6 d-12  r4 c6 c12 r6 c12~4 r4

bassEnd = g1~1
harmAEnd = d1~1
harmBEnd = b1~1
harmCaEnd = f+1~1
harmCbEnd = b1~1
counterAEnd = e1~1
counterBEnd = b1~1
counterCEnd = b1~1

################################################################################
# Percussion (always on channel 9, the only percussion channel)
################################################################################
percussion:
  jazzyBeat = [
    V1: o2 (p) c4 *8
    V2: o2 (mf) [ r4 g+ r g+ ]*2
    V3: o3 (mf) [ b4 b6 b12 ]*4
    V4: o2 (p) [ r2 r6 d12 r4 ]*2
  ]

  jazzyBeat*4

################################################################################
# First group of 15 instruments
################################################################################

midi-electric-bass-finger: o1 bass*2
midi-acoustic-guitar-steel: o2 bass*2
midi-tuba: o1 bass*2
midi-bassoon: o3 harmA*2
midi-french-horn: o3 harmA*2
midi-trombone: o3 harmA*2
midi-rock-organ: o4 harmB*2
midi-tango-accordion: o4 harmB*2
midi-tenor-sax: o4 harmB*2
midi-alto-sax: o4 harmCa*2
midi-vibraphone: o4 harmCb*2
midi-trumpet: o4 harmCb*2
midi-bright-acoustic-piano: o6 counterA*2
midi-glockenspiel: o6 counterB*2
midi-celesta: o7 counterC*2

################################################################################
# Second group of 15 instruments
################################################################################

midi-synth-bass-1: r1*4 o1 bass*2
midi-synth-bass-2: r1*4 o1 bass*2
midi-bass-and-lead: r1*4 (p) o2 bass*2
midi-cello: r1*4 o3 harmA*2
midi-saw-wave: r1*4 o3 harmA*2
midi-synth-pad-choir: r1*4 o3 harmA*2
midi-viola: r1*4 o4 harmB*2
midi-shamisen: r1*4 o4 harmB*2
midi-sitar: r1*4 o4 harmB*2
midi-banjo: r1*4 o4 harmCa*2
midi-violin: r1*4 o4 harmCb*2
midi-kalimba: r1*4 o4 harmCb*2
midi-tinkle-bell: r1*4 o6 counterA*2
midi-fx-crystal: r1*4 o6 counterB*2
midi-whistle: r1*4 o7 counterC*2

################################################################################
# Back to first group
################################################################################

midi-electric-bass-finger: r1*4 o1 bassEnd
midi-acoustic-guitar-steel: r1*4 o2 bassEnd
midi-tuba: r1*4  o1 bassEnd
midi-bassoon: r1*4  o3 harmAEnd
midi-french-horn: r1*4 o3 harmAEnd
midi-trombone: r1*4 o3 harmAEnd
midi-rock-organ: r1*4 o4 harmBEnd
midi-tango-accordion: r1*4 o4 harmBEnd
midi-tenor-sax: r1*4 o4 harmBEnd
midi-alto-sax: r1*4 o4 harmCaEnd
midi-vibraphone: r1*4 o4 harmCbEnd
midi-trumpet: r1*4 o4 harmCbEnd
midi-bright-acoustic-piano: r1*4 o6 counterAEnd
midi-glockenspiel: r1*4 o6 counterBEnd
midi-celesta: r1*4 o7 counterCEnd