Sampled Instrument Player with static and monolithic design. All instruments are built-in.
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# A primitive drum machine interface for Novation Nocturn.
#
# Usage:
# - make sure that Novation Nocturn is connected *and* that the USB device
# that corresponds to it can be opened by the current user
# - create an ini file containing a scene with a single instrument using
# a sampler or fluidsynth engine + some drum mappings in SFZ or SF2
# - ensure that the ini file contains 7 drum patterns, pat1..pat7, these
# can be copied from cboxrc-example
# - user buttons 1..7 start drum patterns
# - user button 8 stops the playback
# - encoder knob 1 adjusts the volume
# - mixer button exits the application
import math
import sys
sys.path = ["./py"] + sys.path
import nocturn
import cbox
quit = False
instr_name = cbox.Document.get_scene().status().instruments.keys()[0]
def clamp(val, min, max):
if val < min:
val = min
elif val > max:
val = max
return val
class NovaBox:
def __init__(self):
self.nocturn = nocturn.Nocturn()
self.cur_pattern = None
self.handlers = {}
self.handlers[83] = self.on_xfade_touch
for i in range(7):
self.handlers[112 + i] = lambda cmd, val: self.on_buttonN_press(cmd - 112) if val > 0 else None
self.handlers[112 + 7] = lambda cmd, val: self.on_button8_press() if val > 0 else None
self.handlers[64] = self.on_knob1_change
self.handlers[65] = self.on_knob2_change
self.handlers[127] = lambda cmd, val: self.on_mixer_press() if val > 0 else None
def on_knob1_change(self, cmd, val):
scene = cbox.Document.get_scene()
instr = scene.status().instruments[instr_name][1]
gain = instr.get_things('/output/1/status', ['gain']).gain
if val > 63:
val = -128 + val
instr.cmd('/output/1/gain', None, gain + val * 0.5)
def on_knob2_change(self, cmd, val):
tempo = cbox.GetThings("/master/status", ['tempo'], []).tempo
if val > 63:
val = -128 + val
tempo = clamp(tempo + val * 0.5, 30, 300)
cbox.do_cmd('/master/set_tempo', None, [tempo])
def on_buttonN_press(self, button):
cbox.do_cmd("/master/stop", None, [])
song = cbox.Document.get_song()
song.loop_single_pattern(lambda: song.load_drum_pattern('pat%d' % (button + 1)))
cbox.do_cmd("/master/seek_ppqn", None, [0])
cbox.do_cmd("/master/play", None, [])
self.cur_pattern = button
def on_button8_press(self):
self.cur_pattern = None
cbox.do_cmd("/master/stop", None, [])
def on_mixer_press(self):
global quit
quit = True
def on_xfade_touch(self, cmd, val):
if val > 0:
print "Do not touch"
def handler(self, cmd, val):
if cmd in self.handlers:
self.handlers[cmd](cmd, val)
return
def poll(self):
self.nocturn.poll(self.handler)
def update(self):
scene = cbox.Document.get_scene()
cmds = nocturn.NocturnCommands()
master = cbox.GetThings("/master/status", ['playing'], [])
for i in range(7):
cmds.setModeButtonLight(i, self.cur_pattern == i)
gain = scene.status().instruments[instr_name][1].get_things('/output/1/status', ['gain']).gain
cmds.setEncoderMode(0, 0)
cmds.setEncoderValue(0, clamp(int(gain * 2 + 64), 0, 127))
cmds.setModeButtonLight(7, self.cur_pattern is None)
self.nocturn.execute(cmds)
nb = NovaBox()
while not quit:
nb.poll()
nb.update()
nb.nocturn.reset()