Alesis ADAT-LX20 Reference Manual page 19

Setting Up and Making Connections - Chapter 1
There are three ways to use this jack.
• Footswitch only. Plug a momentary, single-pole/single-throw footswitch
(either normally open or normally closed) halfway into the jack so that the
footswitch plug tip connects to the jack ring connection. In other word, plug in
only until the tip reaches the first detent. Plug in the footswitch prior to
power-up so that the LX20 can configure itself for the type of footswitch being
used. If you decide to plug in a footswitch after already starting a session, turn
off the LX20, plug in the footswitch, then turn theLX20 back on again.
• LRC only. Plug the LRC plug fully into the jack.
• Footswitch and LRC. Use an adapter that breaks out a stereo plug into two mono
jacks. Plug the footswitch into the mono jack that connects to the stereo jack ring
connection, and the LRC into the mono jack that connects to the stereo jack tip
connection. The following diagram shows the wiring scheme.
This cable is available from several manufacturers, such as Radio Shack (#274-302)
and Hosa (YPP-118).
18 ADAT LX20 Reference Manual