how to set default audio output device

answer: just use pacmd.
in shell see sinks - in pacmd:
list-sinks and use their names.
for example in python code of audioplayer:
```change_audio_device = subprocess.run(['pacmd', 'set-default-sink combined'])```  - outputs to all available devices
```change_audio_device = subprocess.run(['pacmd', 'set-default-sink alsa_output.platform-bcm2835_audio.analog-stereo'])```  - outputs to headset 

