Alda uses timbre for logging. Every note event, attribute change, etc. is logged at the DEBUG level, which can be useful for debugging purposes.

The default logging level is WARN, so by default, you will not see these debug-level logs; you will only see warnings and errors.

To override this setting (e.g. for development and debugging), you can set the TIMBRE_LEVEL environment variable.

To see debug logs, for example, you can do this:

export TIMBRE_LEVEL=debug

When running tests via boot test, the log level will default to debug unless TIMBRE_LEVEL is set to something else.