Roland TR-808 - 4.2. Common System Messages

TR808-M MIDI Interface for Roland TR-808
M odel 8-4 48 ver. 3 .3 0
9
Copyright © 2015 CHD Elektroservis. All rights reserved.
No part of this publication may be reproduced in any form without the written permission of CHD Elektroservis.
•
Launching of sound generators
TR-808’s sound generators can be launched with internal sequencer of TR-808 only or they can
be launched with help of MIDI Note-On commands simultaneously. With help of MIDI notes, sound
generators are launched anytime without dependence on status of TR-808’s internal sequencer.
Not all combinations of control function have a meaning. Valid combinations are put into fourteen
top positions of programs during factory setting. Others program numbers are ignored:
Table 3 – Program map after “Factory Reset”
Control function
Program Nr.
Sound generators activity Tempo of sequencer Start / Stop commands
Remarks
1 sequencer or MIDI notes only internal internal or MIDI cmd
1
)
2 sequencer or MIDI notes only MIDI clock internal or MIDI cmd
1
)
3 sequencer or MIDI notes only internal only internal
1
)
4 sequencer or MIDI notes only MIDI clock only internal
1
)
5 sequencer or MIDI notes only internal only MIDI commands
1
)
6 sequencer or MIDI notes only MIDI clock only MIDI commands
7 sequencer only internal internal or MIDI cmd
1
)
8 sequencer only MIDI clock internal or MIDI cmd
1
)
9 sequencer only internal only internal
1
)
2
)
10 sequencer only MIDI clock only internal
1
)
11 sequencer only internal only MIDI commands
1
)
12 sequencer only MIDI clock only MIDI commands
13 MIDI notes sequencer disabled none
3
)
14 none sequencer disabled none
4
)
15 to 128 no changes no changes no changes
5
)
1
) Internal means that TR-808 can be control by controllers on device’s panel.
2
) MIDI interface disabled – TR-808 is controlled only by its own controllers.
3
) TR-808 works as MIDI sound expander. Its own controllers are disabled.
4
) Both TR-808 and MIDI interface are disabled.
5
) Ignored program numbers – no changes occur after their receiving.
4.2. COMMON SYSTEM MESSAGES
Only "MIDI Clock", "Start", "Stop" and "Continue" common system commands are used for the
interface control. These commands control tempo and launching and stopping of TR-808’s internal
sequencer in dependence on synchronization method (i.e. on selected program number).
Pic. 6 – Reaction of TR808-M to system MIDI commands