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+--- Thread: pyaudio sound output producing strange errors on linux mint (/thread-13254.html)
pyaudio sound output producing strange errors on linux mint - NeilUK - Oct-06-2018
I'm using linux Mint 18 (well, probably misusing, I'm an XP refugee linux noob), and trying to get a beep from a python 3.5 program. Lots of suggestions on the net, like print('\a'), none of which work. So finally, I take a sledgehammer to it with the following suggestion.
import pyaudio
import numpy as np
p = pyaudio.PyAudio()
stream = p.open(format=pyaudio.paFloat32,
channels=1,
rate=44100,
frames_per_buffer=1024,
output=True,
output_device_index=1
)
samples = np.sin(np.arange(10000)/20)
stream.write(samples.astype(np.float32).tostring())
stream.close()Which works, and plays the appropriate tone through my default audio output.But it also throws up the following errors in the console
ALSA lib pcm_dsnoop.c:606:(snd_pcm_dsnoop_open) unable to open slave
ALSA lib pcm_dmix.c:1029:(snd_pcm_dmix_open) unable to open slave
ALSA lib pcm.c:2266:(snd_pcm_open_noupdate) Unknown PCM cards.pcm.rear
ALSA lib pcm.c:2266:(snd_pcm_open_noupdate) Unknown PCM cards.pcm.center_lfe
ALSA lib pcm.c:2266:(snd_pcm_open_noupdate) Unknown PCM cards.pcm.side
ALSA lib pcm_dmix.c:1029:(snd_pcm_dmix_open) unable to open slave
which is tedious, pollutes my other console outputs, and is slightly disturbing
Is this a linux issue, or a python issue?
Is python not addressing my hardware properly?
Is my 'all left at defaults' hardware setup lacking? It plays music and beeps just fine.
My ALSA is k4.4.0-133-generic.
RE: pyaudio sound output producing strange errors on linux mint - Larz60+ - Oct-07-2018
problem discussed here: https://github.com/Uberi/speech_recognition/issues/100