ARP Little Brother

The ARP Little Brother, produced from 1975 to 1977, is a keyboardless monophonic expander module,[2] sold as an add-on for another ARP synthesizer. It was controlled by connecting the control voltage (CV) output of an ARP synthesizer's keyboard to the Little Brother's CV input.

Little Brother
ManufacturerARP Instruments, Inc.
Dates1975 - 1977
Technical specifications
PolyphonyMonophonic
TimbralityMonotimbral
Oscillator1 square[1]
LFO1 triangle
Synthesis typeAnalog Subtractive
FilterNone
Storage memorynone
Effectsnone
Input/output
Keyboardnone
External controlCV/Gate, ARP system interface

The Little Brother had a single voltage controlled oscillator (VCO) with selectable waveforms, and a sub-octave divider that could produce up to three additional tones simultaneously at -1, -2 and -3 octave intervals. It also had an LFO, and a pitch bend/master tuning knob. However, it had no voltage controlled filter (VCF), voltage controlled amplifier (VCA) or envelope generator (EG or ADSR). When used with other ARP synths to "fatten up" their sounds, the Little Brother's audio output had to be patched into the external audio input of its companion synthesizer, essentially adding an extra VCO and LFO to the system.

It was commonly sold with the ARP Axxe, and was given away for free with the purchase of an ARP Odyssey during a summer 1976 promotion. However, it could be used with any analog synthesizer that had the necessary 1v/octave CV output and external audio input connections.

References
  1. "ARP Little Brother Synthesizer Expander Model 2953". Encyclotronic. Retrieved 2018-08-07.
  2. "ARP Axxe & Little Brother (Retro)". Sound On Sound. May 1996. Archived from the original on 6 June 2015.
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