No tonal variation of the voices is possible however (as with several earlier Roland drum machines), the relative balance is variable between the bass and snare drums versus the hi-hat and cymbal. The clap sound uses only shaped white noise, but was triggered by a multiple pulse train, to create a reverberation effect.
The cymbals and hi-hats are created by VCA-shaping and band-pass filtering a combination of white noise and four non- harmonically related square wave oscillators (generating a much more realistic sound than white noise alone). The DR-110's six synthesized drum voices were:Īs with most previous Roland drum machines, the bass and snare voices are generated by a "damped tuned resonance" oscillators. These devices had much the same functionality as the DR-110, but relied upon digital button-press control of parameters rather than knobs. In 1985, Boss released the smaller DR-220 with eleven voices. The DR-110 used a four- bit Hitachi HD44790A44 CMOS microprocessor and 0,5 KB of μPD444C RAM memory. Tempo is continuously variable between 45 and 300 bpm. The DR-110's synthesized drum "voices" (synthesizer sounds) use analog synthesizer circuits. Rubberized touchpads each represent one of the DR-110 voices, and can be used to build a pattern in realtime as well as to enter and edit note data. It has an LCD graphic display, showing a step-programming grid for the various drum voices. supply or batteries.Īlthough not designed as a high-end studio product, The DR-110 nonetheless featured some noticeable advances in technology compared to previous Roland drum machines. It was the second entry in their DR series, following up on the much simpler DR-55.īoss were better known for producing electric guitar accessories such as effects pedals, and the DR-110 is similarly small and lightweight in size (190×110×30mm, and only 450 g), and like most Boss equipment, could be run from a 9 V d.c. The Doctor Rhythm DR-110 Graphic is a drum machine introduced in 1983 by the Boss product division of the Japanese Roland Corporation.
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