Alto S-8 User Manual page 17

Ring=Return Signal (Connected together)
Sleeve=Ground/Screen
Tip=Signal
Sleeve=Ground/Screen
'Tapped' Connection Direct Output Lead
(Enables the Insert to be used as a Direct Output
while maintaining the channel signal flow)
Sleeve=Ground/Screen
Tip
Sleeve Ring
-Stereo lead for insert Connection
(To be used when the processor does not employ a
single jack connection for the In/Out Connections)
16
To Channel Insert
To Tape or FX Input
To Processor Input
Tip=Send Signal
To Channel Insert
Ring=Return Signal
To Processor Output