The syntoniq and syntoniq-kbd commands have detailed --help options that explain how to invoke them from the command line. Both commands also support completion for a number of common shells. Run syntoniq completion --help or syntoniq-kbd completion --help for details.
The most important commands are syntoniq-kbd run and syntoniq generate. You can run syntoniq-kbd run --help and syntoniq generate --help for help on those.
Syntoniq includes a pitch calculator, which is covered in Pitch Calculator.
The following command converts a score to all available outputs.
syntoniq generate \
--score=score.stq \
--csound=score.csd \
--midi=score.midi \
--json=score-timeline.json \
--text=score-timeline.txt
There are several command-line examples in the Complete Example section. The Keyboard chapters include examples of running the keyboard.