Roland CR-1000 (1986)
Digital Drummer

 

A kind of preset version of classic drum machine TR-505 with same samples soundset but inexplicably lacking the great sequencer.

Part of the famous CR - computer rhythm - series started with the famous analog CR78.

DRUM MACHINE main panel features a 7 segment LED display, a rotary selector, 9 knobs and 23 push buttons.

Rear panel terminal connectors:
- main mono signal out
- Midi input
- Midi Thru (no out)
- pedalswitch input start / stop
- pedalswitch input fill-in
- pedalswitch input restart

Power supply is a 9V external PSU DC -)+ negative center.

 

 

TECH the internal CPU is based on a HD6301 family (HD6301Y033P) manages up to 8 voices polyphony based on PCM samples.

 

PCM drum machine synthesis in based on PCM samples playback.
Internal (non-expandable) PCM are read from a single 128 kb ROM (at IC12) which contains 16 non-editable percussive sounds recorded at 8 bits /25 kHz rate

Sound list: kick, snare, rimshot, clap, tom (x3), timbale, hh (open/close), crash, cymbal, tambourine, claves and conga (x2). HEAR all PCM

RHYTHM SEQUENCER the internal ROM memory contains 24 preset that cannot be altered but some user-variations that can be manually set:
- shuffle groove amount
- accent button
- intro/ending
- fill-in
- rhythm variation
- accent level
- clap variation.

Preset list: rock (x4) disco (x2), 16 beat (x2), swing (x2), shuffle, ballad , reggae, tango, samba (x2), merengue, mambo, chacha, rumba, beguine and bossanova. HEAR samba 1 & 2 pattern

SYNC internal tempo range from 40 to 240 BPM or tempo-slaved to external Midi clock.

 

MIDI the CR percussions can be triggered using MIDI but it only responds to note ON/OFF no other controls or CC.

 

MEMORY
- 24 ROM presets.

-LEFT - Battery replacement: 3V Cr2032 soldered to mainboard although there's is not much data to save since it is a preset machine... maybe Midi channel setting? Probably you won't even notice battery is dead. - Click to Enlarge Pic -

 

MAINTENANCE and MODIFICATION pretty solid machine but common tact switch that need replacement.

BENDING - CR1000 - can be also easily Circuit bent... as I did   HEAR circuit bending demo

AUDIO DEMO

	some preset rhythms p1
	some preset rhythms p2
	shuffle range
	accent range

VIDEO SELECTION   Demo circuit bend

 

 

 

MANUAL

SERVICE MANUAL

original brochure

original advert

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