When I set the input selector switch to [BUILT-IN], [EXT 1], or [EXT 2], the effect sound remains, even if the fader of that channel is at the bottom.
[MASTER MIX] might be turned on.
Press the [MASTER MIX] button to turn it off.
[MASTER MIX] might be turned on.
Press the [MASTER MIX] button to turn it off.