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music.py
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music.py
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### music.py v0.13
### A partial emulation of MicroPython micro:bit music library
### Tested with an Adafruit CLUE and CircuitPython and 5.3.1
### MIT License
### Copyright (c) 2020 Kevin J. Walters
### Copyright (c) 2015 Damien P. George and Nicholas H. Tollervey (music)
### Permission is hereby granted, free of charge, to any person obtaining a copy
### of this software and associated documentation files (the "Software"), to deal
### in the Software without restriction, including without limitation the rights
### to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
### copies of the Software, and to permit persons to whom the Software is
### furnished to do so, subject to the following conditions:
### The above copyright notice and this permission notice shall be included in all
### copies or substantial portions of the Software.
### THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
### IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
### FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
### AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
### LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
### OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
### SOFTWARE.
import time
import microbit
### TODO - remove when fixed
### https://github.com/adafruit/circuitpython/issues/3387
BUG_WORKAROUND = True
_ticks = 4 ### _ticks per beat
_bpm = 120
_duration = 4
_octave = 4
gate_off_time_ms = 10 ### 10ms
### The microbit music classical selection
### from https://github.com/micropython/micropython/blob/264d80c84e034541bd6e4b461bfece4443ffd0ac/ports/nrf/modules/music/musictunes.c pylint: disable=line-too-long
DADADADUM = "r4:2 g g g eb:8 r:2 f f f d:8"
ENTERTAINER = "d4:1 d# e c5:2 e4:1 c5:2 e4:1 c5:3 c:1 d d# e c d e:2 b4:1 d5:2 c:4"
PRELUDE = ("c4:1 e g c5 e g4 c5 e c4 e g c5 e g4 c5 e c4 d g d5 f g4 d5 f c4 "
"d g d5 f g4 d5 f b3 d4 g d5 f g4 d5 f b3 d4 g d5 f g4 d5 f c4 e g "
"c5 e g4 c5 e c4 e g c5 e g4 c5 e")
ODE = "e4 e f g g f e d c c d e e:6 d:2 d:8 e:4 e f g g f e d c c d e d:6 c:2 c:8"
NYAN = ("f#5:2 g# c#:1 d#:2 b4:1 d5:1 c# b4:2 b c#5 d d:1 c# b4:1 c#5:1 d# f# "
"g# d# f# c# d b4 c#5 b4 d#5:2 f# g#:1 d# f# c# d# b4 d5 d# d c# b4 "
"c#5 d:2 b4:1 c#5 d# f# c# d c# b4 c#5:2 b4 c#5 b4 f#:1 g# b:2 f#:1 "
"g# b c#5 d# b4 e5 d# e f# b4:2 b f#:1 g# b f# e5 d# c# b4 f# d# e "
"f# b:2 f#:1 g# b:2 f#:1 g# b b c#5 d# b4 f# g# f# b:2 b:1 a# b f# "
"g# b e5 d# e f# b4:2 c#5")
RINGTONE = "c4:1 d e:2 g d:1 e f:2 a e:1 f g:2 b c5:4"
FUNK = "c2:2 c d# c:1 f:2 c:1 f:2 f# g c c g c:1 f#:2 c:1 f#:2 f d#"
BLUES = ("c2:2 e g a a# a g e c2:2 e g a a# a g e f a c3 d d# d c a2 c2:2 e "
"g a a# a g e g b d3 f f2 a c3 d# c2:2 e g e g f e d")
BIRTHDAY = ("c4:3 c:1 d:4 c:4 f e:8 c:3 c:1 d:4 c:4 g f:8 c:3 c:1 c5:4 a4 f "
"e d a#:3 a#:1 a:4 f g f:8")
WEDDING = "c4:4 f:3 f:1 f:8 c:4 g:3 e:1 f:8 c:4 f:3 a:1 c5:4 a4:3 f:1 f:4 e:3 f:1 g:8"
FUNERAL = "c3:4 c:3 c:1 c:4 d#:3 d:1 d:3 c:1 c:3 b2:1 c3:4"
PUNCHLINE = "c4:3 g3:1 f# g g#:3 g r b c4"
PYTHON = ("d5:1 b4 r b b a# b g5 r d d r b4 c5 r c c r d e:5 c:1 a4 r a a "
"g# a f#5 r e e r c b4 r b b r c5 d:5 d:1 b4 r b b a# b b5 r g "
"g r d c# r a a r a a:5 g:1 f#:2 a:1 a g# a e:2 a:1 a g# a d r "
"c# d r c# d:2 r:3")
BADDY = "c3:3 r d:2 d# r c r f#:8"
CHASE = ("a4:1 b c5 b4 a:2 r a:1 b c5 b4 a:2 r a:2 e5 d# e f e d# e b4:1 "
"c5 d c b4:2 r b:1 c5 d c b4:2 r b:2 e5 d# e f e d# e")
BA_DING = "b5:1 e6:3"
WAWAWAWAA = "e3:3 r:1 d#:3 r:1 d:4 r:1 c#:8"
JUMP_UP = "c5:1 d e f g"
JUMP_DOWN = "g5:1 f e d c"
POWER_UP = "g4:1 c5 e g:2 e:1 g:3"
POWER_DOWN = "g5:1 d# c g4:2 b:1 c5:3"
def set_tempo(ticks=4, bpm=120):
global _ticks, _bpm ### pylint: disable=global-statement
_ticks = ticks
_bpm = bpm
def get_tempo():
return (_ticks, _bpm)
### From C3 - A and B are above G
### Semitones A B C D E F G
_NOTE_OFFSET = [21, 23, 12, 14, 16, 17, 19]
_MIDI_A4 = 69
_FREQ_A4 = 440.0
def _parseNote(note):
"""Converts the string encoded note form into frequency and duration in milliseconds.
A rest is returned as note_freq of 0.
"""
if not isinstance(note, str):
raise ValueError("Bad note format")
idx = 0
try:
char_uc = note[idx].upper()
if char_uc == "R":
note_st = None ### signifies a rest
else:
note_st = _NOTE_OFFSET[ord(char_uc) - 65] ### 65 is ord("A")
idx += 1
except IndexError:
raise ValueError("Bad note format")
sharpen = 0
note_oct = _octave
note__ticks = _ticks
### Optional #/b, then octave, then :tickduration
try:
if note[idx] == "#":
sharpen = 1
idx += 1
elif note[idx] == "b":
sharpen = -1
idx += 1
if "0" <= note[idx] <= "9":
note_oct = int(note[idx])
idx += 1
if note[idx] == ":":
idx += 1
note__ticks = int(note[idx:])
except (IndexError, ValueError):
pass
### Convert to a frequency using A4 as the reference
### and counting semitones as MIDI note numbers
if note_st is None:
note_freq = 0
else:
### 12 semitones in an octave
note_freq = _FREQ_A4 * 2 ** (note_oct + (note_st + sharpen - _MIDI_A4) / 12.0)
### _bpm and _ticks are globals here, first number is ms in a minute
note_dur = 60000 * note__ticks / _bpm / _ticks
return (note_freq, note_dur)
def play(music, pin=microbit.pin0, wait=True, loop=False):
if not wait:
raise NotImplementedError("non-blocking play not implemented")
if isinstance(music, str):
### Could check for tabs here...
notes = music.split() if " " in music else (music,)
else:
notes = music
while True:
for note in notes:
freq, dur_ms = _parseNote(note)
if dur_ms > gate_off_time_ms:
pitch(freq, dur_ms - gate_off_time_ms, pin=pin, music_off=False, desc=note)
time.sleep(gate_off_time_ms / 1000.0)
else:
pitch(freq, dur_ms, pin=pin, music_off=False, desc=note)
if not loop:
break
stop(pin)
def pitch(frequency, duration=-1, pin=microbit.pin0, wait=True, music_off=True, desc=None):
"""Play a note of specified frequency for duration or if duration is
negative play it forever.
A frequency of 0 can be used to silence the output
but leave pin in music mode.
"""
if not wait and duration > 0:
raise NotImplementedError("non-blocking pitch not implemented")
if frequency < 0:
raise ValueError("invalid pitch")
pin.music_on()
pin.music_frequency(frequency, desc=desc)
if BUG_WORKAROUND:
time.sleep(0.008)
pin.music_frequency(frequency, desc=desc)
if wait and duration > 0:
time.sleep(duration / 1000.0)
stop(pin, music_off=music_off)
def stop(pin=microbit.pin0, music_off=True):
"""Silence the music output on the pin and turn off music mode."""
pin.music_frequency(0)
if music_off:
pin.music_off()
def reset():
global _ticks, _bpm, _duration, _octave ### pylint: disable=global-statement
_ticks = 4
_bpm = 120
_duration = 4
_octave = 4
### Extras
def update():
pass