TECH the XR10 is a digital drum machine based on a 8-bits CPU NEC D78C10G part of Z80 Zilog processor which handles up to 8 voices polyphony.
The sound is generated by internal PCM samples stored in an internal ROM wavetable.
WAVETABLE the XR ROM contains 64 PCM samples recorded at 16 bits resolution.
Most of the samples are old school big drums, acoustic gated toms but also pretty nice electro percussions in a perfect Kraftwerk-like style.
Each samples can be also backward,
pitch-tuned at 2 octaves range and finally located in the stereo L/R panning position.
SOUND LIST: bass drums (x10), snares (x10), rimshots (x2), hihats (x3), toms (x12), crash (x2), ride cymbal (x2), claps, finger snap, conga (x4), vibraslap, guiros (x2), cabasa, tambourine, triangle (x2), cowbell, claves, timbales (x2), agogo (x2) , slap bass and a FX ochestral hit
INTERFACE all edit with single parameter with limited display:
ENVELOPE each assigned sample have 1 single EG that features:
- 1 segment DECAY
- 1 time SUSTAIN (31 levels each).
LFO section offers a single modulator SWEEP for the pitch (the famous "warped-simmons" effect) with some basic programming parameters such as:
modulator polarity inversion.
SEQUENCER note entries system works in 2 different modes:
A- realtime at 96 ppqn resolution
B- simple step entries.
The maximum global resolution is fixed to 1/96 and offers 8 different level of quantisation (or humanize) from 1/4 to 1/48 plus a classic array of traditional edit functions like copy, insert or repeats.
A basic pattern is programmed with 4 sub-levels (FILL-INS, INTRO, ENDING and BREAKS) that can be played back with dedicated function buttons.
MIDI sound kits can be triggered using Midi interface, however implementation is rather basic and offers only control on velocity sytem.
SYNC internal tempo range 40-296 BPM or XR can be slaved to external Midi clock, altough some sync issues have been reported (maybe depends on the OS?).
- 300 notes per pattern
- 20 songs
450 presets patterns
50 styles with: 3 variations,
3 fill-ins + break +1 intro + 1 ending.
Created sequences and songs can be data dumped to Midi exclusives protocol.
TIP: One of most irritating function of the machine is the MEMORY PROTECT which is always turns back to ON when switching off the drum machine.
MAINTENANCE 2 main isssues:
-most common issue are the pads: the graphite contact just goes dying after many pressures. Cleaning with alcohol or various stuff will do nothing and can worsen situation for sure, best solution is electro conductive solution (see PIC PADS REPAIR)
- Second common" issue" is the battery replacement, a standard soldered Cr2032 3V.
(UPPER) Xr10 motherboard - click for bigger picture
XE-8 Rackmount percussion expander is similar but with a different soundset VIDEO
XR-10 circuit bent: like many cheap romplers, the XR is frequently modded with circuit bending process on the ROM wavetable - usually recommanded for people who enjoy glitch and weird digital noises VIDEO