2.1. CONNECTION OF TR-808 TO DIN-SYNC BUS Pins number 1 to 5 of SYNC connector on TR-808’s rear panel are used for DIN-SYNC bus. For connection, standard four-core shielded cable with 5-pin DIN connector on both ends of cable is used –...
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).
MIDI SysEx message. 3.3.2. “DEFAULT PROGRAM NR.“ PARAMETER The parameter specifies number of program what will be set as active after TR-808 is turned on (after the interface reset). Program Nr. 1 (also see table 3) is set as default during factory setting. If necessary, default program number can be changed by user.
The change can be processed with help of MIDI SysEx message. 3.3.4. “DAC CALIBRATION“ PARAMETER The parameter calibrates amplitude of trigger pulses for TR-808’s sound generators so that all generators would be launched correctly. Parameter value is set to maximum (value 127) during factory setting. If necessary, the value can be changed with help of MIDI SysEx message.
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MIDI Interface for Roland TR-808 Model 8-448 ver. 3.30 Assigning of TR-808’s sound generators to individual MIDI notes (instrument map) is user programmable with help of MIDI SysEx messages. Assigning programmed during factory setting is listed in table 2 (also see pic. 4). That setting conforms to C/M, GM, GS, XG standards. Complete drum maps of these standards are listed in table 5 (see appendix C.).
(with help of SysEx Message) for any program number independently. Also a program number can be ignored – no changes occur after that program number receiving. User can choose which of programs will be active after the interface reset (after TR-808 is turned on). Global parameter “Default Program“ specifies that program number.
Model 8-448 ver. 3.30 • 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.
For the proper synchronization, the "MIDI Clock" tempo must be between 30 and 300 BPM. For lower or higher tempo, TR-808’s sequencer already can’t synchronize. Reaction of TR-808 to "Start", "Stop" and "Continue" MIDI commands is shown on pic. 6.
Please contact the authorized service. Invalid data in the internal memory MIDI cell - reset the interface by switching EEPROM the TR-808 off and on. If the error remains after the reset it is a hardware Failed Cell failure. Please contact the authorized service.
Table6 – FAQ & troubleshooting Problem: Solution: The device doesn't receive Set SYNC switch on rear panel of TR-808 instrument to middle MIDI data at all. position. Use special MIDI cable delivered with the interface. The interface doesn't work with standard MIDI cable!
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