def _set_source(self):
"""Data source: file_in, array, or microphone
"""
if os.path.isfile(self.file_in):
_rate, self._sndTable = table_from_file(self.file_in,
start=self.config['start'],
stop=self.config['stop'])
if _rate != self.rate:
print('file sample rate differs from the voice-key rate.')
self._source = pyo.TableRead(self._sndTable,
freq=self._sndTable.getRate(),
mul=self.config['vol'])
self.sec = self._sndTable.getDur()
elif len(self.array_in):
self._sndTable = table_from_samples(self.array_in,
start=self.config['start'],
stop=self.config['stop'],
rate=self.rate)
self._source = pyo.TableRead(self._sndTable,
freq=self._sndTable.getRate(),
mul=self.config['vol'])
self.sec = self._sndTable.size / self.rate
else:
# fall through to source = microphone
ch = self.config['chnl_in']
self._source = pyo.Input(chnl=ch, mul=self.config['vol'])
def pyo_init(rate=44100, nchnls=1, buffersize=32, duplex=1):
"""Start and boot a global pyo server, restarting if needed.
"""
global pyo_server
if rate < 16000:
raise ValueError('sample rate must be 16000 or higher')
# re-init
if hasattr(pyo_server, 'shutdown'):
pyo_server.stop()
sleep(0.25) #make sure enough time passes for the server to shutdown
pyo_server.shutdown()
sleep(0.25)
pyo_server.reinit(sr=rate,
nchnls=nchnls,
buffersize=buffersize,
duplex=duplex)
else:
pyo_server = pyo.Server(
sr=rate,
nchnls=nchnls, # 1 = mono
buffersize=buffersize, # ideal = 64 or higher
duplex=duplex) # 1 = input + output
pyo_server.boot().start()
# avoid mac issue of losing first 0.5s if no sound played for ~1 minute:
if sys.platform == 'darwin':
z2 = np.zeros(2)
_sndTable = pyo.DataTable(size=2, init=z2.T.tolist(), chnls=nchnls)
_snd = pyo.TableRead(_sndTable, freq=rate, mul=0)
_snd.play()
time.sleep(0.510)