Alesis QS7.1

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The QS7.1 is a 64 Voice Expandable Synthesizer based on the QS6.1 and QS7 QuadraSynths. It's basically the same as the QS6.1 but has a 72-note keyboard and additional audio outs. But compared to the older QS7, it offers up a much needed larger LCD display screen and a few more direct access buttons to certain edit function and parameters. It uses digital ROM samples (16MB) of sounds containing a library of 640 programs and 500 multitimbral mixes. Really amazing pianos, orchestral sounds as well as vintage synth sounds, strings, brass, winds, guitars, drums, percussion loops and groove patterns can all be found here.

The QS7.1 features 64 multitimbral parts over 16 MIDI channels. That's a lot. And since it's 64 voices polyphonic, you can arrange some pretty complex and complete music, from full orchestras to trance dance tracks, beats and sfx heaven! The keyboard can be split into 16-zones! Control the volume, panning, transposition, effects level and more of each channel independently. Four on-board edit/control sliders are assignable to most modulation parameters. Onboard multi-effects based on the QuadraVerb 2 include reverb, chorus, distortion, EQ, delay, rotary speaker simulation and more. These are on four independent busses so it's like having four FX units!

Powerful MIDI implementation suits the QS7.1 for any studio situation. But it has more! It can connect to your Mac or PC using its RS422 or RS232 ports. The QS7.1 comes with a CD-rom (Mac/PC) with Alesis' Sound Bridge and FreeLoader applications, plus programs for sequencing, editor/librarians, notation, extra samples, programs and mixes, sample sequences, demos and more. Either way you choose to use the QS7.1 it is a truly professional yet affordable versatile synth for the creative player/composer who needs a wider keyboard. For the flagship model, look no further than the QS8.1 with 88-weighted keys with piano style hammer-action.

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Demos & Media

Audio Clip 1 Here are a bunch of demo patches from the QS7 - displaying the QS-synth's wide range of excellent contemporary, acoustic, and electronic synth sounds & textures. From the Future Music CD, issue 51.
Audio Clip 2 Onboard demo of the QS6.1 and its cool sounds.
ManualAlesis have made manuals and program charts for many of their products available on-line, for free download as .PDF files.


Polyphony - 64 Voices (with dynamic voice allocation)
Oscillators - QS Composite Synthesis (16 Bit Linear 48kHz Sample ROM): 16 MB, expandable to 32 MB via PCMCIA Expansion Card Slots
LFO - 3 LFO's
Filter - 64: 1 Sweepable Lowpass Filter per voice
Effects - QuadraSynth 2 four-Bus Parallel Matrix Effects: reverb, chorus, distortion, EQ, delay, rotary speaker simulation and more.
Keyboard - 76 semi-weighted keys (velocity, release velocity, aftertouch sensitive)
Memory - Programs: 512 preset, 128 user; Mix Mode: 400 preset, 100 user.
Expandable using QCards or RAM Cards via 2 PCMCIA expansion card slots
Control - MIDI IN, OUT, THRU (64 Part multitimbral across 16 MIDI channels); RS422 and RS232 serial protocols, Mac and PC compatible
Date Produced - 1999


Images from Synth Site.