Roland VK-8 用户手册

An external keyboard can be connected here, allowing 
you to play the VK-8 as a two-manual instrument (p. 59).
You could also connect an external sequencer here, and 
get the VK-8 to play the music the sequencer sends it (p. 
60).

A pedal keyboard can be connected here, allowing you 
to play the pedals (p. 59).
You could also connect an external sequencer here, and 
get the VK-8 to play the music the sequencer sends it (p. 
60).

An external MIDI device can be connected here to 
receive MIDI data transmitted from the VK-8 (p. 60, p. 
61).

A pedal switch can be connected here. While you press 
the pedal, the organ voice or other voice you are playing 
will be sustained (p. 18, 42).

An expression pedal (EV-5 or EV-7; sold separately) can 
be connected here (p. 18, p. 39).

Accepts connection of a pedal switch or expression 
pedal. The desired function can be assigned to the pedal  
(p. 18, p. 40).

An amp, powered speakers, etc., can be connected here. 
If outputting in monaural, connect to the L (MONO) jack 
(p. 17).