def play(filename_or_url,
volume=None,
loop=False,
sync_beat=None,
start_at_next=None,
on_finished=None):
if volume is None:
try:
volume = NVS('system').get_i32('volume')
except:
volume = 255
_start_audio_if_needed()
channel_id = _add_channel(filename_or_url, on_finished)
if channel_id is None or channel_id < 0:
print('Failed to start audio channel')
return channel_id
sndmixer.volume(channel_id, volume)
if loop:
sndmixer.loop(channel_id, True)
if sync_beat is not None and start_at_next is not None:
sndmixer.start_beat_sync(sync_beat)
sndmixer.start_at_next(channel_id, start_at_next)
else:
sndmixer.play(channel_id)
return channel_id
def _add_channel(filename_or_url, on_finished=None):
global handles
stream = True
is_url = filename_or_url.startswith('http')
if is_url:
file = urequests.get(filename_or_url).raw
else:
if not os.path.isfile(filename_or_url):
print('File %s does not exist' % filename_or_url)
return -1
file = open(filename_or_url, 'rb')
lower = filename_or_url.lower()
if(lower.endswith('.mp3')):
channel_id = sndmixer.mp3_stream(file)
elif(lower.endswith('.wav')):
channel_id = sndmixer.wav_stream(file)
elif(lower.endswith('.ogg') or
lower.endswith('.opus')):
channel_id = sndmixer.opus_stream(file) # No support for looping yet
elif(lower.endswith('.mod') or
lower.endswith('.s3m') or
lower.endswith('.xm')):
channel_id = sndmixer.mod(file.read()) # No support for streaming mod files or looping yet
stream = False
else:
print('Audio: unknown filetype')
channel_id = -1
if channel_id < 0:
return -1
if is_url:
# Needed when streaming from HTTP sockets
sndmixer.play(channel_id)
def finish_callback(_):
_clean_channel(channel_id)
if on_finished is not None:
try:
on_finished()
except:
pass
handles[channel_id] = file
if stream:
sndmixer.on_finished(channel_id, finish_callback)
return channel_id
def play(index):
global global_playing, global_file, global_channels, global_filenames, MAX_FILES
if index < 0 or index > MAX_FILES:
print("Play: invalid index")
if global_playing[index]:
print("Play: already playing")
return
channel = sndmixer.mp3_stream(global_file[index])
if not channel:
print("Play: invalid channel id")
return
try:
volume = machine.nvs_getint("system", "volume") or 255
print("Volume:",volume)
sndmixer.volume(channel, volume)
sndmixer.play(channel)
except:
pass
global_channels[index] = channel
global_playing[index] = True
def on_key(key_index, is_pressed):
global pattern
if is_pressed:
x, y = keypad.index_to_coords(key_index)
pattern[x + y * 4] = (pattern[x + y * 4] + 1) % 4
if pattern[x + y * 4] == 0:
display.drawPixel(x, y, 0x400000)
tone = 396
elif pattern[x + y * 4] == 1:
display.drawPixel(x, y, 0x004000)
tone = 440
elif pattern[x + y * 4] == 2:
display.drawPixel(x, y, 0x004040)
tone = 495
elif pattern[x + y * 4] == 3:
display.drawPixel(x, y, 0x404000)
tone = 528
display.flush()
sndmixer.freq(synth, tone)
sndmixer.play(synth)
sndmixer.volume(synth, 64)
virtualtimers.new(100, sound_off, False)