SQ-80 — Musician's Manual
As you may have observed, the button up codes are differentiated from the button down codes by a positive
offset of 51 decimal or $33 hex. The Button Code 00 is reserved for illegal key events within the system and
should not be sent to the SQ-80 . Also, button codes out of the range specified in the above table should not
be sent to the SQ-80.
2.5.1 Compare Button Status Message
This message is both sent and received by the SQ-80 . It is sent whenever the Compare status of the SQ-80
is changed by pressing the Compare button. The same message format is recognized when it is received from
another SQ-80 or ESQ product if recognition of system exclusive messages is enabled (MIDI
ENABLE=KEYS+CT+PC+SS+SX).
xxxxxxxx ESQ/SQ-80 System Exclusive header
00010000 Compare Status Command code
0000000n Status of the Compare button
n=1, Compare On
n=0, Compare Off
11110111 End of exclusive
2.6 MIDI Song Selects
MIDI Song Selects may be received by the SQ-80 when the setting of the MIDI Enable parameter is
"KEYS+CT+PC+SNGSL" or "KEYS+CT+PC+SS+SX". Inbound MIDI Song Selects are recognized only in
sequencer STOP or SNGS (Song Stop) modes. Song Selects 00 to 19 will select defined songs within that range
and put the sequencer into Song Mode. Selects for undefined songs will be ignored. The ESQ-1 will interpret MIDI
Song Selects 20 through 79 as sequence
selects, and will map them onto SEQ-1 through SEQ-60. A Song Select
20, for example, will select SEQ-1 if it is defined, and will then put the sequencer into Sequence Mode. MIDI Song
Selects are transmitted whenever a song or sequence is selected from the SEQ BANK pages by using the softkeys
on the front panel (virtual keypad events will also transmit them).
2.7 MIDI Device Inquiry/I.D. Messages
2.7.1 Device Inquiry Message
The SQ-80 supports the MIDI Device Inquiry message which allows instruments and computers to ascertain the
identity of the unit(s) to which they are connected. The SQ-80 will respond to the following Device Inquiry Message
with the Device ID Message detailed below. The SQ-80 will respond to the inquiry if the channel information in the
message contains either the base MIDI channel number of the SQ-80 or the all channel broadcast code ($7F).
11110000 System Exclusive status byte
01111110 Non real time message
0000nnnn nnnn=MI DI Channel number
Or
01111111 All channel broadcast code
00000110 General Information message code
00000001 Device Inquiry Message message code
11111110 End of Exclusive
SQ-80 MIDI Implementation Specification 195
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