pub fn set_delay_level(
audio_service: State<'_, Mutex<AudioService>>,
persistence_service: State<'_, Mutex<AmpConfigPersistenceService>>,
effect_id: u32,
level: f32,
) -> Result<(), String>pub fn set_delay_level(
audio_service: State<'_, Mutex<AudioService>>,
persistence_service: State<'_, Mutex<AmpConfigPersistenceService>>,
effect_id: u32,
level: f32,
) -> Result<(), String>