Hi pipo,
"3.3.7 Sequencer Mute
Each sequencer has a dedicated MUTE button, which is great for live performances and creative sessions.
They can help you focus on the interactions of any two sequencers at a time, or you can use them to work on one of the patterns without hearing the others.
For the drum sequencer, you can choose to mute only specific pads by holding the DRUM button and MUTE button simultaneously, and pressing the pads you want to mute.
The Drum sequencer’s MUTE button will blink to show that some of the drum tracks are muted.
The status of the MUTE buttons is not stored with the Project."