python binaural_theta.py 
ALSA lib pcm_dmix.c:1000:(snd_pcm_dmix_open) unable to open slave
ALSA lib pcm.c:2721:(snd_pcm_open_noupdate) Unknown PCM cards.pcm.rear
ALSA lib pcm.c:2721:(snd_pcm_open_noupdate) Unknown PCM cards.pcm.center_lfe
ALSA lib pcm.c:2721:(snd_pcm_open_noupdate) Unknown PCM cards.pcm.side
ALSA lib pcm_route.c:878:(find_matching_chmap) Found no matching channel map
Expression 'alsa_snd_pcm_hw_params_set_buffer_size_near( pcm, hwParams, &lowLatency )' failed in 'src/hostapi/alsa/pa_linux_alsa.c', line: 929
Expression 'alsa_snd_pcm_hw_params_set_buffer_size_near( pcm, hwParams, &lowLatency )' failed in 'src/hostapi/alsa/pa_linux_alsa.c', line: 929
Expression 'alsa_snd_pcm_hw_params_set_buffer_size_near( pcm, hwParams, &lowLatency )' failed in 'src/hostapi/alsa/pa_linux_alsa.c', line: 929
Cannot connect to server socket err = No such file or directory
Cannot connect to server request channel
jack server is not running or cannot be started
JackShmReadWritePtr::~JackShmReadWritePtr - Init not done for -1, skipping unlock
JackShmReadWritePtr::~JackShmReadWritePtr - Init not done for -1, skipping unlock
Cannot connect to server socket err = No such file or directory
Cannot connect to server request channel
jack server is not running or cannot be started
JackShmReadWritePtr::~JackShmReadWritePtr - Init not done for -1, skipping unlock
JackShmReadWritePtr::~JackShmReadWritePtr - Init not done for -1, skipping unlock
ALSA lib pcm_oss.c:397:(_snd_pcm_oss_open) Cannot open device /dev/dsp
ALSA lib pcm_oss.c:397:(_snd_pcm_oss_open) Cannot open device /dev/dsp
ALSA lib pcm_a52.c:1001:(_snd_pcm_a52_open) a52 is only for playback
ALSA lib confmisc.c:160:(snd_config_get_card) Invalid field card
ALSA lib pcm_usb_stream.c:482:(_snd_pcm_usb_stream_open) Invalid card 'card'
ALSA lib confmisc.c:160:(snd_config_get_card) Invalid field card
ALSA lib pcm_usb_stream.c:482:(_snd_pcm_usb_stream_open) Invalid card 'card'
ALSA lib pcm_dmix.c:1000:(snd_pcm_dmix_open) unable to open slave
Cannot connect to server socket err = No such file or directory
Cannot connect to server request channel
jack server is not running or cannot be started
JackShmReadWritePtr::~JackShmReadWritePtr - Init not done for -1, skipping unlock
JackShmReadWritePtr::~JackShmReadWritePtr - Init not done for -1, skipping unlock
Pyo warning: Portaudio output device `HDA ATI SB: ALC662 rev1 Analog (hw:0,0)` has fewer channels (0) than requested (2).
Portaudio error in Pa_OpenStream: Invalid number of channels
Pyo error: From portaudio, Invalid number of channels
Portaudio error in Pa_CloseStream (pa_deinit): PortAudio not initialized
Portaudio error in Pa_Terminate (pa_deinit): PortAudio not initialized
Pyo error: 
Server not booted.
Pyo warning: The Server must be booted before calling the start method!
Traceback (most recent call last):
  File "/home/m/Downloads/musicpython/binaural_theta.py", line 15, in <module>
    left_tone = Sine(freq=base_freq, mul=0.5).out(0)
  File "/home/m/miniconda3/envs/pyo_env/lib/python3.10/site-packages/pyo/lib/generators.py", line 60, in __init__
    PyoObject.__init__(self, mul, add)
  File "/home/m/miniconda3/envs/pyo_env/lib/python3.10/site-packages/pyo/lib/_core.py", line 1218, in __init__
    PyoObjectBase.__init__(self)
  File "/home/m/miniconda3/envs/pyo_env/lib/python3.10/site-packages/pyo/lib/_core.py", line 894, in __init__
    raise PyoServerStateException("The Server must be booted before creating any audio object.")
pyo.lib._core.PyoServerStateException: The Server must be booted before creating any audio object.
(pyo_env) m@m:~/Downloads/musicpython$