How to set the aftertouch MIDI channel?

On the Laboratory hardware MIDI controller, click on SetUp then on the 6/Global button.

Param: AftTchCh
Value: xx

...where "xx" can be:

• 01...16: the explicit channel number
• Lwr: sends on the Lower channel
• Upr: sends on the Upper channel
• All: sends 2 aftertouch messages, both on the Lower and Upper channels
• Pnl: sends on the Lower or Upper channel, depending which one is highlighted on the keyboard frontpanel.