Need some help! [resolved]

Hello there.
I just got my rytm last week.

How can i describe this problem but still dont get it!

When i record some synth line with Pad 3 (RS3) and overdubbing with other pad, Pad 4(CP4) sounds like it’s muting or sidechaining effect. I think these pads are connected them. And the other question is what is the white line on between the pads? Like this ‘’’


It means they share the same analog voice and therefore cannot play at the same time. They will choke one another. The RYTM has 12 pads and 8 voices. The white lines show the pads that share a voice.