def test_pswitchone():
a = iso.PSwitchOne(iso.PSeries(0, 1), 4)
expected = [0, 1, 2, 3, 0, 1, 3, 2, 0, 1, 2, 3, 3, 1, 2, 0, 3, 2, 1, 0]
a.seed(0)
assert a.nextn(20) == expected
a.reset()
assert a.nextn(20) == expected
def test_pshuffleevery():
a = iso.PShuffleInput(iso.PSeries(0, 1), 4)
expected = [
2, 0, 1, 3, 4, 5, 7, 6, 8, 10, 9, 11, 13, 12, 15, 14, 18, 16, 19, 17
]
a.seed(0)
assert a.nextn(20) == expected
a.reset()
assert a.nextn(20) == expected
def test_pskip_regular():
a = iso.PSkip(iso.PSeries(0, 1), 0.5, True)
expected = [
None, 1, None, 3, None, 5, None, 7, None, 9, None, 11, None, 13, None,
15, None, 17, None, 19
]
a.seed(0)
assert a.nextn(20) == expected
a.reset()
assert a.nextn(20) == expected
def test_pskip():
a = iso.PSkip(iso.PSeries(0, 1), 0.5)
expected = [
None, None, 2, 3, None, 5, None, 7, 8, None, None, None, 12, None,
None, 15, None, None, None, None
]
a.seed(0)
assert a.nextn(20) == expected
a.reset()
assert a.nextn(20) == expected
def test_timeline_schedule_count(dummy_timeline):
dummy_timeline.schedule({
iso.EVENT_NOTE: iso.PSeries(0, 1),
iso.EVENT_DURATION: 1
}, count=4)
dummy_timeline.run()
assert len(dummy_timeline.output_device.events) == 8
assert dummy_timeline.output_device.events == [
[0, "note_on", 0, 64, 0], [1, "note_off", 0, 0],
[1, "note_on", 1, 64, 0], [2, "note_off", 1, 0],
[2, "note_on", 2, 64, 0], [3, "note_off", 2, 0],
[3, "note_on", 3, 64, 0], [4, "note_off", 3, 0]
]
def test_event_control_no_interpolation(dummy_timeline):
"""
Simple case: schedule a series of regularly-spaced control points.
Output device should receive discrete control events.
"""
control_series = iso.PSeries(start=1, step=2, length=3)
dummy_timeline.schedule({
iso.EVENT_CONTROL: 0,
iso.EVENT_VALUE: control_series,
iso.EVENT_DURATION: 1,
iso.EVENT_CHANNEL: 9
})
dummy_timeline.run()
assert dummy_timeline.output_device.events == [[0, "control", 0, 1, 9],
[1, "control", 0, 3, 9],
[2, "control", 0, 5, 9]]
#!/usr/bin/python
import isobar as iso
# create a repeating sequence with scalar transposition:
# [ 36, 38, 43, 39, ... ]
a = iso.PSeq([0, 2, 7, 3]) + 36
# apply pattern-wise transposition
# [ 36, 50, 43, 51, ... ]
a = a + iso.PSeq([0, 12])
# create a geometric chromatic series, repeated back and forth
b = iso.PSeries(0, 1, 12) + 72
b = iso.PPingPong(b)
b = iso.PLoop(b)
# create an velocity series, with emphasis every 4th note,
# plus a random walk to create gradual dynamic changes
amp = iso.PSeq([50, 35, 25, 35]) + iso.PBrown(0, 1, -20, 20)
# a Timeline schedules events at a given BPM.
# by default, send these over the first MIDI output.
output_device = iso.io.midi.MidiOut("IAC Driver IAC Bus 1")
timeline = iso.Timeline(120, device=output_device, debug=True)
# assign each of our Patterns to particular properties
timeline.sched({'note': a, 'dur': 1, 'gate': 2})
timeline.run()
# sequences, scales, stochastic functions, scheduling and mapping. #------------------------------------------------------------------------ import isobar as iso #------------------------------------------------------------------------ # Turn on some basic logging output. #------------------------------------------------------------------------ import logging logging.basicConfig(level=logging.INFO, format="[%(asctime)s] %(message)s") #------------------------------------------------------------------------ # Create a geometric series on a minor scale. # PingPong plays the series forward then backward. PLoop loops forever. #------------------------------------------------------------------------ arpeggio = iso.PSeries(0, 2, 6) arpeggio = iso.PDegree(arpeggio, iso.Scale.minor) + 72 arpeggio = iso.PPingPong(arpeggio) arpeggio = iso.PLoop(arpeggio) #------------------------------------------------------------------------ # Create a velocity sequence, with emphasis every 4th note, # plus a random walk to create gradual dynamic changes. # Amplitudes are in the MIDI velocity range (0..127). #------------------------------------------------------------------------ amplitude = iso.PSequence([50, 35, 25, 35]) + iso.PBrown(0, 1, -20, 20) #------------------------------------------------------------------------ # Create a repeating sequence with scalar transposition: # [ 36, 38, 43, 39, 36, 38, 43, 39, ... ] #------------------------------------------------------------------------
def test_preset():
a = iso.PSeries(0, 1)
b = iso.PReset(a, iso.PImpulse(4))
c = iso.PSubsequence(b, 0, 10)
assert list(c) == [0, 1, 2, 3, 0, 1, 2, 3, 0, 1]
def test_psubsequence():
a = iso.PSeries()
b = iso.PSubsequence(a, 4, 4)
assert list(b) == [4, 5, 6, 7]
def test_pseries():
a = iso.PSeries(2, iso.PSequence([1, 2]), iso.PConstant(5))
assert list(a) == [2, 3, 5, 6, 8]
def test_pmap_args():
a = iso.PSequence([4, 5, 1, -2, 1, -1.5], 1)
b = iso.PMap(a, lambda x, y: x + y, iso.PSeries())
assert list(b) == [4, 6, 3, 1, 5, 3.5]