"OSError: [Errno -9985] Device unavailable"

[Nel-Fie]

While trying to use the I/O wire example provided with the master (io_wire.py) with any other audio API than the default, I always get this error (in PyCharm CE, W7 x64 with Python 3.5.1)):
(The [...]'s are redactions on my path, the actual traceback contains the full path.)

Traceback (most recent call last):
  File "C:/[...]/audiolazy_master/examples/io_wire.py", line 46, in <module>
    pr.play(pr.record())
  File "C:\[...]\lib\site-packages\audiolazy\lazy_io.py", line 270, in play
    new_thread = AudioThread(self, audio, **kwargs)
  File "C:\[...]\lib\site-packages\audiolazy\lazy_io.py", line 401, in __init__
    **kwargs)
  File "C:\[...]\lib\site-packages\pyaudio.py", line 750, in open
    stream = Stream(self, *args, **kwargs)
  File "C:\[...]\lib\site-packages\pyaudio.py", line 441, in __init__
    self._stream = pa.open(**arguments)
OSError: [Errno -9985] Device unavailable

Process finished with exit code 1

Here is the modified script for the wire:

[...]
from audiolazy import chunks, AudioIO
import sys

# Choose API via command-line
api = sys.argv[1] if sys.argv[1:] else None
print(api)

# Amount of samples per chunk to be sent to PortAudio
chunks.size = 1 if api == "jack" else 16

with AudioIO(True, api="asio") as pr: # A player-recorder
  pr.play(pr.record())

When using the I/O wire example provided with the PyAudio master (PyAudio-0.2.9.tar/test/wire_full.py), the wire works perfectly fine, the ASIO device is detected and the wire established. Here is the script, with the index of my ASIO device being 12:

import pyaudio
import sys

CHUNK = 256
WIDTH = 2
CHANNELS = 1
RATE = 44100
RECORD_SECONDS = 5

if sys.platform == 'darwin':
    CHANNELS = 1

p = pyaudio.PyAudio()

stream = p.open(format=p.get_format_from_width(WIDTH),
                channels=CHANNELS,
                rate=RATE,
                input=True,
                input_device_index=12,
                output_device_index=12,
                output=True,
                frames_per_buffer=CHUNK)

print("* recording")

for i in range(0, int(RATE / CHUNK * RECORD_SECONDS)):
    data = stream.read(CHUNK)
    stream.write(data, CHUNK)

print("* done")

stream.stop_stream()
stream.close()

p.terminate()

Here's the info for the device, as given by as given by p.get_device_info_by_index(12):

{'defaultLowInputLatency': 0.0014512471655328798, 'name': 'Yamaha Steinberg USB ASIO', 'defaultHighInputLatency': 0.0014512471655328798, 'index': 12, 'structVersion': 2, 'maxOutputChannels': 2, 'defaultLowOutputLatency': 0.0014512471655328798, 'maxInputChannels': 2, 'defaultHighOutputLatency': 0.0014512471655328798, 'hostApi': 2, 'defaultSampleRate': 44100.0}

Sorry if it it's a PICNIC.

[danilobellini]

Thanks for reporting this! Have you tried with api="yamaha" instead of api="asio"? What are the device names for the remaining indices?

[Nel-Fie]

Thank you for your swift answer!

I've tried your suggestion. Unfortunately, I get the standard "api not found" exception, as follows:

Traceback (most recent call last):
  File "C:\[...]\lib\site-packages\audiolazy\lazy_io.py", line 196, in __init__
    self.api = next(el for el in apis_gen
StopIteration

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "C:/[...]/audiolazy_master/examples/io_wire.py", line 45, in <module>
    with AudioIO(True, api="yamaha") as pr: # A player-recorder
  File "C:\[...]\lib\site-packages\audiolazy\lazy_io.py", line 199, in __init__
    raise RuntimeError("API '{}' not found".format(api))
RuntimeError: API 'yamaha' not found

Process finished with exit code 1

As for other devices, here is what PyAudio spits out:

{'defaultLowInputLatency': 0.09, 'structVersion': 2, 'maxOutputChannels': 0, 'index': 0, 'defaultHighInputLatency': 0.18, 'defaultLowOutputLatency': 0.09, 'name': 'Microsoft Soundmapper - Input', 'defaultHighOutputLatency': 0.18, 'maxInputChannels': 2, 'defaultSampleRate': 44100.0, 'hostApi': 0}
{'defaultLowInputLatency': 0.09, 'structVersion': 2, 'maxOutputChannels': 0, 'index': 1, 'defaultHighInputLatency': 0.18, 'defaultLowOutputLatency': 0.09, 'name': 'Line (Steinberg CI1)', 'defaultHighOutputLatency': 0.18, 'maxInputChannels': 2, 'defaultSampleRate': 44100.0, 'hostApi': 0}
{'defaultLowInputLatency': 0.09, 'structVersion': 2, 'maxOutputChannels': 2, 'index': 2, 'defaultHighInputLatency': 0.18, 'defaultLowOutputLatency': 0.09, 'name': 'Microsoft Soundmapper - Output', 'defaultHighOutputLatency': 0.18, 'maxInputChannels': 0, 'defaultSampleRate': 44100.0, 'hostApi': 0}
{'defaultLowInputLatency': 0.09, 'structVersion': 2, 'maxOutputChannels': 2, 'index': 3, 'defaultHighInputLatency': 0.18, 'defaultLowOutputLatency': 0.09, 'name': 'Line (Steinberg CI1)', 'defaultHighOutputLatency': 0.18, 'maxInputChannels': 0, 'defaultSampleRate': 44100.0, 'hostApi': 0}
{'defaultLowInputLatency': 0.09, 'structVersion': 2, 'maxOutputChannels': 2, 'index': 4, 'defaultHighInputLatency': 0.18, 'defaultLowOutputLatency': 0.09, 'name': 'Digitalaudio (S/PDIF) (High Def', 'defaultHighOutputLatency': 0.18, 'maxInputChannels': 0, 'defaultSampleRate': 44100.0, 'hostApi': 0}
{'defaultLowInputLatency': 0.09, 'structVersion': 2, 'maxOutputChannels': 2, 'index': 5, 'defaultHighInputLatency': 0.18, 'defaultLowOutputLatency': 0.09, 'name': 'Digitalaudio (S/PDIF) (High Def', 'defaultHighOutputLatency': 0.18, 'maxInputChannels': 0, 'defaultSampleRate': 44100.0, 'hostApi': 0}
{'defaultLowInputLatency': 0.12, 'structVersion': 2, 'maxOutputChannels': 0, 'index': 6, 'defaultHighInputLatency': 0.24, 'defaultLowOutputLatency': 0.0, 'name': 'Primärer Soundaufnahmetreiber', 'defaultHighOutputLatency': 0.0, 'maxInputChannels': 2, 'defaultSampleRate': 44100.0, 'hostApi': 1}
{'defaultLowInputLatency': 0.12, 'structVersion': 2, 'maxOutputChannels': 0, 'index': 7, 'defaultHighInputLatency': 0.24, 'defaultLowOutputLatency': 0.0, 'name': 'Line (Steinberg CI1)', 'defaultHighOutputLatency': 0.0, 'maxInputChannels': 2, 'defaultSampleRate': 44100.0, 'hostApi': 1}
{'defaultLowInputLatency': 0.0, 'structVersion': 2, 'maxOutputChannels': 2, 'index': 8, 'defaultHighInputLatency': 0.0, 'defaultLowOutputLatency': 0.12, 'name': 'Primärer Soundtreiber', 'defaultHighOutputLatency': 0.24, 'maxInputChannels': 0, 'defaultSampleRate': 44100.0, 'hostApi': 1}
{'defaultLowInputLatency': 0.0, 'structVersion': 2, 'maxOutputChannels': 2, 'index': 9, 'defaultHighInputLatency': 0.0, 'defaultLowOutputLatency': 0.12, 'name': 'Line (Steinberg CI1)', 'defaultHighOutputLatency': 0.24, 'maxInputChannels': 0, 'defaultSampleRate': 44100.0, 'hostApi': 1}
{'defaultLowInputLatency': 0.0, 'structVersion': 2, 'maxOutputChannels': 2, 'index': 10, 'defaultHighInputLatency': 0.0, 'defaultLowOutputLatency': 0.12, 'name': 'Digitalaudio (S/PDIF) (High Definition Audio-Gerät)', 'defaultHighOutputLatency': 0.24, 'maxInputChannels': 0, 'defaultSampleRate': 44100.0, 'hostApi': 1}
{'defaultLowInputLatency': 0.0, 'structVersion': 2, 'maxOutputChannels': 2, 'index': 11, 'defaultHighInputLatency': 0.0, 'defaultLowOutputLatency': 0.12, 'name': 'Digitalaudio (S/PDIF) (High Definition Audio-Gerät)', 'defaultHighOutputLatency': 0.24, 'maxInputChannels': 0, 'defaultSampleRate': 44100.0, 'hostApi': 1}
{'defaultLowInputLatency': 0.0014512471655328798, 'structVersion': 2, 'maxOutputChannels': 2, 'index': 12, 'defaultHighInputLatency': 0.0014512471655328798, 'defaultLowOutputLatency': 0.0014512471655328798, 'name': 'Yamaha Steinberg USB ASIO', 'defaultHighOutputLatency': 0.0014512471655328798, 'maxInputChannels': 2, 'defaultSampleRate': 44100.0, 'hostApi': 2}
{'defaultLowInputLatency': 0.005011337868480726, 'structVersion': 2, 'maxOutputChannels': 0, 'index': 13, 'defaultHighInputLatency': 0.02, 'defaultLowOutputLatency': 0.005011337868480726, 'name': 'ZOOM H and F Series ASIO', 'defaultHighOutputLatency': 0.02, 'maxInputChannels': 0, 'defaultSampleRate': 44100.0, 'hostApi': 2}
{'defaultLowInputLatency': 0.0, 'structVersion': 2, 'maxOutputChannels': 0, 'index': 14, 'defaultHighInputLatency': 0.0, 'defaultLowOutputLatency': 0.0, 'name': 'ZOOM H and F Series Multi ASIO', 'defaultHighOutputLatency': 0.0, 'maxInputChannels': 0, 'defaultSampleRate': 0.0, 'hostApi': 2}
{'defaultLowInputLatency': 0.0, 'structVersion': 2, 'maxOutputChannels': 2, 'index': 15, 'defaultHighInputLatency': 0.0, 'defaultLowOutputLatency': 0.003, 'name': 'Line (Steinberg CI1)', 'defaultHighOutputLatency': 0.01, 'maxInputChannels': 0, 'defaultSampleRate': 44100.0, 'hostApi': 3}
{'defaultLowInputLatency': 0.0, 'structVersion': 2, 'maxOutputChannels': 2, 'index': 16, 'defaultHighInputLatency': 0.0, 'defaultLowOutputLatency': 0.003, 'name': 'Digitalaudio (S/PDIF) (High Definition Audio-Gerät)', 'defaultHighOutputLatency': 0.0101587, 'maxInputChannels': 0, 'defaultSampleRate': 44100.0, 'hostApi': 3}
{'defaultLowInputLatency': 0.0, 'structVersion': 2, 'maxOutputChannels': 2, 'index': 17, 'defaultHighInputLatency': 0.0, 'defaultLowOutputLatency': 0.003, 'name': 'Digitalaudio (S/PDIF) (High Definition Audio-Gerät)', 'defaultHighOutputLatency': 0.0101587, 'maxInputChannels': 0, 'defaultSampleRate': 44100.0, 'hostApi': 3}
{'defaultLowInputLatency': 0.003, 'structVersion': 2, 'maxOutputChannels': 0, 'index': 18, 'defaultHighInputLatency': 0.01, 'defaultLowOutputLatency': 0.0, 'name': 'Line (Steinberg CI1)', 'defaultHighOutputLatency': 0.0, 'maxInputChannels': 2, 'defaultSampleRate': 44100.0, 'hostApi': 3}
{'defaultLowInputLatency': 0.01, 'structVersion': 2, 'maxOutputChannels': 2, 'index': 19, 'defaultHighInputLatency': 0.04, 'defaultLowOutputLatency': 0.01, 'name': 'SPDIF Out (HD Audio-SPDIF-Ausgabe 5)', 'defaultHighOutputLatency': 0.04, 'maxInputChannels': 0, 'defaultSampleRate': 44100.0, 'hostApi': 4}
{'defaultLowInputLatency': 0.01, 'structVersion': 2, 'maxOutputChannels': 2, 'index': 20, 'defaultHighInputLatency': 0.04, 'defaultLowOutputLatency': 0.01, 'name': 'SPDIF Out (HD Audio-SPDIF-Ausgabe)', 'defaultHighOutputLatency': 0.04, 'maxInputChannels': 0, 'defaultSampleRate': 44100.0, 'hostApi': 4}
{'defaultLowInputLatency': 0.01, 'structVersion': 2, 'maxOutputChannels': 0, 'index': 21, 'defaultHighInputLatency': 0.08533333333333333, 'defaultLowOutputLatency': 0.01, 'name': 'Line (Steinberg CI1)', 'defaultHighOutputLatency': 0.08533333333333333, 'maxInputChannels': 2, 'defaultSampleRate': 44100.0, 'hostApi': 4}
{'defaultLowInputLatency': 0.01, 'structVersion': 2, 'maxOutputChannels': 2, 'index': 22, 'defaultHighInputLatency': 0.08533333333333333, 'defaultLowOutputLatency': 0.01, 'name': 'Line (Steinberg CI1)', 'defaultHighOutputLatency': 0.08533333333333333, 'maxInputChannels': 0, 'defaultSampleRate': 44100.0, 'hostApi': 4}

If it helps, here are the available host api's, also according to PyAudio:

{'structVersion': 1, 'deviceCount': 6, 'index': 0, 'defaultInputDevice': 1, 'name': 'MME', 'defaultOutputDevice': 3, 'type': 2}
{'structVersion': 1, 'deviceCount': 6, 'index': 1, 'defaultInputDevice': 6, 'name': 'Windows DirectSound', 'defaultOutputDevice': 8, 'type': 1}
{'structVersion': 1, 'deviceCount': 3, 'index': 2, 'defaultInputDevice': 12, 'name': 'ASIO', 'defaultOutputDevice': 12, 'type': 3}
{'structVersion': 1, 'deviceCount': 4, 'index': 3, 'defaultInputDevice': 18, 'name': 'Windows WASAPI', 'defaultOutputDevice': 15, 'type': 13}
{'structVersion': 1, 'deviceCount': 4, 'index': 4, 'defaultInputDevice': 21, 'name': 'Windows WDM-KS', 'defaultOutputDevice': 22, 'type': 11}

For good measure, I've tried those that aren't ASIO. MME works, Windows DirectSound is mute but does not raise an exception, Windows WASAPI works (distorted/downsampled sound, though), while Windows WDM-KS raises the following exception:

Traceback (most recent call last):
  File "C:/[...]/audiolazy_master/examples/io_wire.py", line 48, in <module>
    pr.play(pr.record())
  File "C:/[...]\lib\site-packages\audiolazy\lazy_io.py", line 328, in record
    **kwargs),
  File "C:/[...]\lib\site-packages\pyaudio.py", line 750, in open
    stream = Stream(self, *args, **kwargs)
  File "C:/[...]\lib\site-packages\pyaudio.py", line 441, in __init__
    self._stream = pa.open(**arguments)
OSError: [Errno -9999] Unanticipated host error

Sorry if I missed anything, or if something I wrote is obvious. I'm still a novice to python and I never had to worry about audio APIs outside of the context of DAWs until now.

[ipieren]

Hello!
This generally happens if your microphone is being used by some other device.
Just check the applications that are currently using your microphone or some other input device.

[ravurip]

Hello! I'm facing the same issue on raspberry pi.

Expression 'ret' failed in 'src/hostapi/alsa/pa_linux_alsa.c', line: 1736
Expression 'AlsaOpen( &alsaApi->baseHostApiRep, params, streamDir, &self->pcm )' failed in 'src/hostapi/alsa/pa_linux_alsa.c', line: 1904
Expression 'PaAlsaStreamComponent_Initialize( &self->capture, alsaApi, inParams, StreamDirection_In, NULL != callback )' failed in 'src/hostapi/alsa/pa_linux_alsa.c', line: 2171
Expression 'PaAlsaStream_Initialize( stream, alsaHostApi, inputParameters, outputParameters, sampleRate, framesPerBuffer, callback, streamFlags, userData )' failed in 'src/hostapi/alsa/pa_linux_alsa.c', line: 2840
Traceback (most recent call last):
File "", line 4, in
File "/usr/lib/python3/dist-packages/pyaudio.py", line 750, in open
stream = Stream(self, *args, **kwargs)
File "/usr/lib/python3/dist-packages/pyaudio.py", line 441, in init
self._stream = pa.open(**arguments)
OSError: [Errno -9985] Device unavailable

Below is the microphone info, as read by the pyaudio input device info.

 >>>p.get_default_input_device_info()
{'index': 2, 'structVersion': 2, 'name': 'USB PnP Sound Device: Audio (hw:1,0)', 'hostApi': 0, 'maxInputChannels': 1, 'maxOutputChannels': 0, 'defaultLowInputLatency': 0.008684807256235827, 'defaultLowOutputLatency': -1.0, 'defaultHighInputLatency': 0.034829931972789115, 'defaultHighOutputLatency': -1.0, 'defaultSampleRate': 44100.0}

Can somebody please let me know what I'm missing here.

[rudrathegreat]

Same here, even though nothing is using my mic