Roland TR-808 - MIDI Interface Description and Connection; 2.1. Connection of TR-808 to DIN-SYNC Bus

TR
TR TR
TR-
--
-808 MIDI Interface
808 MIDI Interface808 MIDI Interface
808 MIDI Interface Model 8
Model 8Model 8
Model 8-
--
-448 ver. 2.0
448 ver. 2.0448 ver. 2.0
448 ver. 2.0
3
Copyright © 2005 CHD Elektroservis
All rights reserved. No part of this publication may be reproduced in any form without the written permission of CHD Elektroservis.
1. MIDI interface description
The TR-808 MIDI retrofit enables your Roland TR-808 to be synchronized with other MIDI
devices and work like polyphonic velocity sensitive MIDI drum expander. More over all original features
of the TR-808 are not changed.
2. Selection of TR-808 operation modes
The operation modes are selected by three-position "SYNC" switch on the rear panel:
a) The upper position "INPUT" and lower "OUTPUT" sets the TR-808 to receive or transmit the CV
DIN-SYNC. The MIDI interface is switched off in both Upper and lower positions. All TR-808
functions remain the same as on original, not retrofitted instrument. TR-808 acts like DIN-SYNC
master unit fully controlled with panel buttons or DIN-SYNC slave unit controlled by other DIN-
SYNC machine respectively.
b) The middle position sets the TR-808 in MIDI mode. In this mode, The TR-808 is controlled via
MIDI bus or controllers on TR-808 panel. LED embedded in "START/STOP" button lits in MIDI
mode.
INPUT
OUT-
PUT
INPUT
OUT-
PUT
INPUT
OUT-
PUT
a) CV DIN-SYNC b) MIDI INPUT
2.1. Connection of TR-808 to MIDI system
Device is connected to DIN-SYNC bus or to MIDI bus via 7-pin connector ("SYNC") on rear panel
of TR-808. Pins 1 to 5 are used for DIN-SYNC signals, pins 6 and 7 are used for MIDI input. For the
DIN-SYNC control ("SYNC" switch in "INPUT" or "OUTPUT" position) use standard 5-pin cable, same
as with the original not retrofitted TR808. For the MIDI control ("SYNC" switch in central position), use
special 7-pin to 5-pin reduction cable (part of interface delivery). For the TR808 use the 7-pin
connector side, for MIDI output of sequencer (or master keyboard etc.) use the standard 5-pin
connector side.
Front view :
1 - DIN-SYNC Start / Stop
2 - DIN-SYNC Ground
3 - DIN-SYNC Clock
4 - DIN-SYNC Fill In
5 - DIN-SYNC Reset / Start
6 - MIDI In (+)
7 - MIDI In (-)
DIN-S
Y
NC IN
/
OUT
6 7
MIDI IN
1 4 2 5 3