Alesis QuadraSynth (1993)
A 76-key digital synthesizer introduced by Alesis as their first major synth, featuring 64-voice polyphony and PCM-based sound generation.
Overview
The Alesis QuadraSynth is a digital subtractive synthesizer released in 1993, marking Alesis's debut into the synthesizer market. It features a 76-key keyboard with velocity and release velocity sensitivity, as well as channel aftertouch. Sound is generated using PCM samples, forming the basis of its digital subtractive architecture. Known for its distinctive voice, the QuadraSynth has drawn strong opinions from users, with some calling it their "first real synth" and others noting it splits opinions like no other.
Specifications
| Polyphony | 64 voices |
| Keyboard | 76 keys |
| Keybed Features | Velocity-sensitive, release velocity-sensitive, monophonic aftertouch |
| Sound Generation | PCM sample-based digital subtractive synthesis |
| Dimensions | 120 cm x 35 cm x 11 cm |
| Weight | 18 kg |
Market
Owners have reported common issues including non-functional displays and damaged pitch-bend levers. Repair discussions exist, particularly for the QuadraSynth Plus Piano variant. Units have appeared in secondhand markets such as yard sales for around $75, with some questioning whether $100 is a fair price for a working model.
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