TR808-M MIDI Interface for Roland TR-808
M odel 8-4 48 ver. 3 .3 0
4
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No part of this publication may be reproduced in any form without the written permission of CHD Elektroservis.
2.2. CONNECTION OF TR-808 TO MIDI BUS
Pins number 6 and 7 of SYNC connector on TR-808’s rear panel are used for MIDI bus. For
connection, special MIDI cable (part of the interface delivery) is necessary. 7-pin connector on one
side of the cable is used for SYNC connector on TR-808’s rear panel and 5-pin connector on the other
side of the cable is used for output of MIDI transmitter (see pic. 3).
For proper functionality of MIDI control, the switch near the SYNC connector on TR-808’s rear
panel must be in center position. Host MIDI system must transmit sync data MIDI Clock, Transport and
Note-On commands so that the interface can be fully utilized.
Front view:
6 - MIDI In (+)
7 - MIDI In (-)
Pic. 3 – Connection of TR-808 to M IDI system
3. OPERATION
MIDI interface is activated by setting of SYNC switch on TR-808’s rear panel to center position.
Then the interface works automatically (in dependence on global parameter setting and on selected
program number) and it need not any next user’s incidence.
3.1. TR-808’S OPERATION MODES SELECTION
TR-808’s operation mode is selected by three-position SYNC slide switch on
rear panel of TR-808:
a) In upper position “INPUT“, input mode of DIN-SYNC bus is selected. MIDI
interface is turned off in this mode and all functions of TR-808 stay the same as
in original instrument. TR-808 is controlled via external analogue sync signals
and/or by controllers on TR-808’s panel respectively.
b) In lower position “OUTPUT“, output mode of DIN-SYNC bus is selected. MIDI
interface is turned off in this mode and all functions of TR-808 stay the same as
in original instrument. TR-808 is control by controllers on TR-808’s panel and
corresponding commands are transmitted to DIN-SYNC output simultaneously.
c) In center position (without label) of SYNC switch, MIDI mode is selected. TR-
808 is controlled via received MIDI commands and/or by controllers on TR-
808’s panel (selectable). Activity of MIDI mode is indicated by light of LED
indicator under START / STOP button on TR-808’s panel.
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