THE REAR PANEL
L & R Input Connectors
These are the analog stereo inputs to the SPX990. The XLR-
3-31 type connector and TRS phone jacks are both electrical
balanced input connectors. Refer to "SELECTING AN
INPUT MODE" on page 9 when connecting to monaural
output jacks.
Input Level Switch (+4dB/-20dB)
The level switch selects either -20dB or +4dB nominal input
level.
L & R Output Connectors
These are the analog stereo output to the SPX990. The XLR-
3-32 type connector and TRS phone jacks are both electrical
balanced output connectors.
Output Level Switch (+4dB/-20dB)
The switch selects either the -20dB or the +4dB nominal
output level.
MIDI IN Terminal
This terminal is used to receive the MIDI signals from
external MIDI devices.
MIDI OUT/THRU Terminals
OUT/THRU Switch
Selects either MIDI THRU or MIDI OUT operation for the
MIDI OUT/THRU connector, described below.
Trigger Footswitch Jack
The footswitch jack can set parameters in a program and
trigger effect programs. The footswitch jack accepts an
optional Yamaha equivalent connector FC4 or FC5 for foot-
controlled triggering of any effect program.
Bypass or INC/DEC Footswitch Jack
The following functions can be used to change the setting of
the edit mode.
Memory INC/DEC Function
Bypass Function
When the optional footswitch FC4 or FC5 is connected to the
jack, it can be used as the same function as in Bypass Key in
on the front panel.
When an optional footswitch FC4 or FC5 is connected to the
jack, it can be used as a foot control to change program.
MIDI
OUT
When the switch controlling MIDI terminal is set at MIDI
OUT, the internal data are fed to an external MIDI data
recorder for storage.
MIDI THRU
When the switch is set at MIDI THRU, the terminal simply
re-transmit data received at the MIDI IN terminal, allowing
daisy-chaining to other MIDI devices.
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