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#
# output.py - uses the Output() unit to simplify MIDI routing and sending
# program changes
#
# This script assumes that the folling sound sources are connected to
# mididings:
#
# - A sampler, connected to the first output port, listening on channel 1.
# Program 1 is an acoustic piano sound, program 4 is a Rhodes piano.
#
# - A synthesizer, connected to the second output port. On channel 3, there's
# an organ sound. On channel 4, there's a string sound.
#
# Program changes on channel 16 switch between scenes.
#
from mididings import *
config(
# create two output ports
out_ports = ['sampler', 'synth'],
)
piano = Output('sampler', 1, 1)
rhodes = Output('sampler', 1, 4)
organ = Output('synth', 3)
strings = Output('synth', 4)
run(
scenes = {
# scene 1: play piano.
# this will switch the sampler to program 1, then route all events
# to it
1: piano,
# scene 2: play organ, transposed one octave down
2: Transpose(-12) >> organ,
# scene 3: split keyboard at C3, the lower part plays rhodes, the
# upper part plays strings
3: KeySplit('c3', rhodes, strings),
},
# control patch: use program changes on channel 16 to switch between
# scenes
control = Filter(PROGRAM) >> ChannelFilter(16) >> SceneSwitch(),
# preprocessing: filter out program changes, everything else is sent to
# the current scene
pre = ~Filter(PROGRAM),
)
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