Music Assistant’s mobile group panel adds volume and timing controls to each speaker’s row. For Sendspin players, Speed up and Slow down buttons adjust timing in steps of one, ten or one hundred milliseconds.
Andrii Mitnovych connects the remote controls to each player’s saved Sendspin delay; changing them requires permission to edit player configuration. Other audio protocols do not get the delay control, and the local player keeps its delay in the app’s settings.