def switchOn(sampleRate=48000, outputDevice=None, bufferSize=None):
"""You need to switch on the microphone before use, which can take
several seconds. The only time you can specify the sample rate (in Hz)
is during switchOn().
Considerations on the default sample rate 48kHz::
DVD or video = 48,000
CD-quality = 44,100 / 24 bit
human hearing: ~15,000 (adult); children & young adult higher
human speech: 100-8,000 (useful for telephone: 100-3,300)
Google speech API: 16,000 or 8,000 only
Nyquist frequency: twice the highest rate, good to oversample a bit
pyo's downsamp() function can reduce 48,000 to 16,000 in about 0.02s
(uses integer steps sizes). So recording at 48kHz will generate
high-quality archival data, and permit easy downsampling.
outputDevice, bufferSize: set these parameters on the pyoSndServer
before booting; None means use pyo's default values
"""
# imports pyo, creates sound.pyoSndServer using sound.initPyo() if not yet
# created
t0 = core.getTime()
try:
global pyo
import pyo
global haveMic
haveMic = True
except ImportError: # pragma: no cover
msg = ('Microphone class not available, needs pyo; '
'see http://code.google.com/p/pyo/')
logging.error(msg)
raise ImportError(msg)
if pyo.serverCreated():
sound.pyoSndServer.setSamplingRate(sampleRate)
else:
# sound.initPyo() will create pyoSndServer. We want there only
# ever to be one server
# will automatically use duplex=1 and stereo if poss
sound.initPyo(rate=sampleRate)
if outputDevice:
sound.pyoSndServer.setOutputDevice(outputDevice)
if bufferSize:
sound.pyoSndServer.setBufferSize(bufferSize)
logging.exp('%s: switch on (%dhz) took %.3fs' %
(__file__.strip('.py'), sampleRate, core.getTime() - t0))
def switchOn(sampleRate=48000, outputDevice=None, bufferSize=None):
"""You need to switch on the microphone before use, which can take
several seconds. The only time you can specify the sample rate (in Hz)
is during switchOn().
Considerations on the default sample rate 48kHz::
DVD or video = 48,000
CD-quality = 44,100 / 24 bit
human hearing: ~15,000 (adult); children & young adult higher
human speech: 100-8,000 (useful for telephone: 100-3,300)
Google speech API: 16,000 or 8,000 only
Nyquist frequency: twice the highest rate, good to oversample a bit
pyo's downsamp() function can reduce 48,000 to 16,000 in about 0.02s
(uses integer steps sizes). So recording at 48kHz will generate
high-quality archival data, and permit easy downsampling.
outputDevice, bufferSize: set these parameters on the pyoSndServer
before booting; None means use pyo's default values
"""
# imports pyo, creates sound.pyoSndServer using sound.initPyo() if not yet
# created
t0 = core.getTime()
try:
global pyo
import pyo
global haveMic
haveMic = True
except ImportError: # pragma: no cover
msg = ('Microphone class not available, needs pyo; '
'see http://code.google.com/p/pyo/')
logging.error(msg)
raise ImportError(msg)
if pyo.serverCreated():
sound.pyoSndServer.setSamplingRate(sampleRate)
else:
# sound.initPyo() will create pyoSndServer. We want there only
# ever to be one server
# will automatically use duplex=1 and stereo if poss
sound.initPyo(rate=sampleRate)
if outputDevice:
sound.pyoSndServer.setOutputDevice(outputDevice)
if bufferSize:
sound.pyoSndServer.setBufferSize(bufferSize)
logging.exp('%s: switch on (%dhz) took %.3fs' %
(__file__.strip('.py'), sampleRate, core.getTime() - t0))
def test_reinit_pyo(self):
pytest.skip()
# was stalling on some machines; revisit if decide to stick with pyo
sound.initPyo()
def test_reinit_pyo(self):
pytest.skip()
# was stalling on some machines; revisit if decide to stick with pyo
sound.initPyo()
def test_reinit_pyo(self):
sound.initPyo()
def test_reinit_pyo(self):
sound.initPyo()
