4.0.4

Fix non-multichannel sessions mixing up positional args

Adds support for real-time multichannel transcription using separate audio files.
This feature can be enabled with the --multichannel flag, followed by a comma-separated list of channel names, and an equal number of file paths to transcribe. Each channel name corresponds to the file at the same position in the list.

Example usage:

speechmatics rt transcribe \
  --ssl-mode=none \
  --url=ws://0.0.0.0:9000 \
  --diarization=channel \
  --multichannel=channel_1,channel_2 \
  --lang=en \
  --chunk-size=1024 \
  --raw=pcm_s16le \
  --sample-rate=16000 \
  /path_to_audio/file_1.wav \
  /path_to_audio/file_2.wav

Note: All input files must currently use the same audio format.