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PCM 80 Version 1.10 MIDI Implementation Details
Lexicon
SysEx Automation
SysEx Automation is intended primarily for facilities using multiple PCM 80s in identical modes of
operation. This mode, which is enabled from the PCM 80 front panel, asumes that all units have the same
effects in the same locations and the same algorithm cards loaded, and that a single master unit front panel
is controlling all slaved units. (Only front panel operations are transmitted as SysEx automation
commands.) Ideally, the master’s Target ID (Control 3.4) should be set to All. The MIDI inputs of all slave
units must be connected directly to the master MIDI OUT. This requires a MIDI THRU box if there is more
than one slave. This is not an appropriate mode for effect editing.
The displays of the slaves do not necessarily track the display of the master, although the internal states
do. Although knob turns and button pushes are not transmitted, the actual parameter values are. This
guarantees that the slave units will be locked directly to the master values. The only exceptions to this are
the Tap, Compare and Bypass buttons, whose states are transmitted to the slaves because they change
the internal state of the device. The others are visual only.
Not all system parameters are transmitted by SysEx Automation. Those which are transmitted are listed
in Appendix E.
Other MIDI Implementation notes
MIDI Controller 32 is used for Bank Select. MIDI Controller 0 (normally the most significant bits of Bank
Select) is ignored.
Program Change messages may be lost if they are sent to the PCM 80 before previous Program Change
messages are completed. Controller Data may be sent at full MIDI speed, with no loss of data.
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