Alesis Quadrasynth

Last updated
Quadrasynth
Alesis QuadraSynth Plus.jpg
Alesis Quadrasynth
Manufacturer Alesis
Price£1499 GBP
Technical specifications
Polyphony 64-note polyphonic 1 sound programs
32-note polyphonic 2 sound programs
16-note polyphonic 4 sound programs
Timbrality 16-part multi-timbral [1]
Aftertouch expression Yes
Velocity expressionYes
Storage memoryQS: 128 preset 128 user programs, 100 preset, 100 user mixes QS Plus: 512 preset 128 user programs, 400 preset, 100 user mixes
Effects 4-part multi-effectual (4 FX at once)
Input/output
Keyboard 76 keys
External control MIDI, 2 programmable pedal Controllers

The Alesis Quadrasynth is a 76-key, 64-note polyphonic [2] PCM sample-based digital subtractive synthesizer first introduced in 1993. It was Alesis's first major foray into synthesizer production.

Contents

Function

In the Quadrasynth's composite synthesis system, up to four "tones" are used to create a single "patch" or synthesizer sound. These individual "tones" are created by using 16-bit digital single-cycle waveforms or digital samples as oscillator sources, and are then processed via a digital non-resonant filter, various LFOs and envelope generators, and so on - in the usual manner. The Quadrasynth contained 16MB of ROM containing PCM-based waveforms and samples, with the option of expanding the sample base via PCMCIA expansion cards which plug into the back of the synthesizer.

A "patch" on the Quadrasynth can contain 1, 2, 3 or 4 of these tones. However, polyphony decreases as more tones are used. For example, a 1-tone patch would have 64-note polyphony, a 2-tone patch would have 32-note polyphony, and a 4-tone patch would only have 16-note polyphony. Patches can only be stored in the User bank. All other banks are factory presets which cannot be overwritten. The Quadrasynth was typical of synthesizers of the early 90s, featuring a digital, menu-based editing system. Editing user patches could be tedious if the user is unfamiliar with its complex editing structure or has not read the manual.

A multitimbral "mix" (or "performance") can contain up to 16 parts (patches). Each part can respond to the full range of the keyboard or to a configured subrange, which allows for layering and splitting. Each patch in a mix corresponds to a different MIDI channel, so that the Quadrasynth can become a multitimbral playback device for external sequencers or MIDI file players. The Quadrasynth also had a 4-bus multi effects processor, which is based on Alesis' own Quadraverb 2 stand-alone effects processor. A main function of the synthesizer is its ability to output in Quadraphonic, on the rear of the keyboard .

History

In 1995, Alesis gave the Quadrasynth an upgrade with the QuadraSynth Plus. It had more ROM (24MB), plus many more program patches. The General MIDI library was added, as well as an 8MB stereo Grand Piano sample.

In 1996, Alesis introduced the first of their QS series synthesizers. The first of these were the QS6 61-key synth and the QSR rackmount synth. Following these in quick succession were the QS7 76-key synth and the QS8 88-key synth (the flagship of the series). Essentially, the QS synths' architecture is still based on the original Quadrasynth, but with the important addition of a modulation matrix, allowing users to assign virtually any controller source to any modulation parameter. Many of the sounds in the Preset and User banks were re-written, and new samples were created, including samples of Keith Emerson's infamous Yamaha GX1 synthesizer. Emerson even wrote new patches for it, and demonstrated the new QS8 at a release party for Alesis in 1996.

In 1998, Alesis upgraded the QS line with the QS6.1, QS7.1 and QS8.1, which were basically the same as the original QS line, except that Alesis created a new 8MB Bosendorfer Stereo Grand Piano sample for them. Also, a bigger LCD screen, and a few extra assignable sliders (for performance tweaking) were included.

In 2003, Alesis decided to keep the QS series alive with the QS6.2 and QS8.2 (there was no 76-key version). This happened after Alesis declared bankruptcy in 2001 and was acquired by Numark. Basically, the x.2 line is identical to the x.1 line but with many stripped-down hardware options. There is now no ADAT port, no multiple outs (only a stereo pair), only one PCMCIA expansion slot, and no aftertouch on the 88-key model. The only other differences are a new brushed-aluminum casing (replacing the original black metal casing), plastic end-caps instead of oak (on the 88-key models), ergonomic placing of cursor buttons, and 24-bit effects and DAC's.

Related Research Articles

Roland D-50 Synthesizer

The Roland D-50 is a synthesizer produced by Roland and released in April 1987. Its features include subtractive synthesis, on-board effects, a joystick for data manipulation, and an analogue synthesis-styled layout design. The external Roland PG-1000 (1987-1990) programmer could also be attached to the D-50 for more complex manipulation of its sounds. It was also produced in a rack-mount variant design, the D-550 (1987-1990), with almost 450 user-adjustable parameters.

Korg Triton Workstation synthesizer

The Korg Triton is a music workstation synthesizer, featuring digital sampling and sequencing, released in 1999. It uses Korg's HI Synthesis tone generator and was eventually available in several model variants with numerous upgrade options. The Triton became renowned as a benchmark of keyboard technology, and has been widely featured in music videos and live concerts. At the NAMM 2007, Korg announced the Korg M3 as its successor.

Ensoniq ESQ-1 Synthesizer

Ensoniq ESQ-1 is a 61-key, velocity sensitive, eight-note polyphonic and multitimbral synthesizer released by Ensoniq in 1985. It was marketed as a "digital wave synthesizer" but was an early Music Workstation. Although its voice generation is typically subtractive in much the same fashion as most analog synthesizers that preceded it, its oscillators are neither voltage nor "digitally controlled", but true digital oscillators, provided by a custom Ensoniq wavetable chip. The signal path includes analog resonant low-pass filters and an analog amplifier.

Monotimbral is usually used in reference to electronic synthesizers which can produce a single timbre at a given pitch when pressing one key or multiple keys.

Moog Concertmate MG-1 Monophonic analog synthesizer

The Realistic Concertmate MG-1 is an analog synthesizer manufactured by Moog Music in 1981 and sold by Radio Shack from 1982 to 1983 under their "Realistic" brand name. It was produced without some standard Moog features, such as pitch and modulation wheels, as a cost-cutting measure aimed at achieving a lower price for the consumer market. The synthesizer also featured a pair of pass-through RCA jacks, which allowed users to mix radio or records into the final live synthesized sound output.

microKORG Synthesizer released in 2002

The microKORG is a MIDI-capable digital synthesizer/vocoder from Korg featuring DSP analog modelling. The synthesizer is built in such a way that it is essentially a Korg MS-2000 with programmable step arpeggiator, a less advanced vocoder, lack of motion sequencing, lack of an XLR microphone input, and in a smaller case with fewer real-time control knobs.

Korg DW-8000 Hybrid digital-analog synthesizer

The Korg DW-8000 synthesizer was an eight-voice polyphonic hybrid digital-analog synthesizer 61-note keyboard instrument released in 1985. By the time of its launch Korg had already begun a common trend in 1980s synthesizer design: using numerical codes to access or change parameters with its predecessor - the Korg Poly-61, which was widely regarded as the company's first 'knobless' synthesizer. This was a move away from the heavily laden, complex control panels of earlier designs.

Yamaha Motif Series of music workstations

The Yamaha Motif is a series of music workstation synthesizers, first released by Yamaha Corporation in August 2001. The Motif replaced the EX series in Yamaha's line-up and was also based on the early Yamaha S series. Other workstations in the same class are the Korg Kronos and the Roland Fantom G. The series' successor is Yamaha Montage.

Alesis Andromeda A6 Synthesizer made by Alesis between 2000 and 2010

The Alesis Andromeda A6 is a 16-voice, 16-channel multitimbral analog synthesizer by Alesis which was released in 2000 and discontinued in 2010. The Andromeda has analog oscillators and filters combined with modern digital control. It can be considered a hybrid of older and newer technologies, but its entire signal path is purely analog. The VCOs have a very practical pitch correction function, a feature missing on other old polysynths. The VCOs have FM and ring modulation and sub-oscillators. These features makes it possible to create a much wider sonic palette than usual on analog polysynths.

Korg Wavestation Synthesizer

The Korg Wavestation is a vector synthesis synthesizer first produced in the early 1990s and later re-released as a software synthesizer in 2004. Its primary innovation was Wave Sequencing, a method of multi-timbral sound generation in which different PCM waveform data are played successively, resulting in continuously evolving sounds. The Wavestation's "Advanced Vector Synthesis" sound architecture resembled early vector synths such as the Sequential Circuits Prophet VS.

The Ensoniq TS-10 was a synthesizer and music workstation introduced by Ensoniq in 1993. It provided synthesis, user sample playback, sequencer, effect units and performance facilities in a 61-key package. Another version, the TS-12, had the same features plus 76 weighted keys and polyphonic aftertouch.

The Yamaha SY85 is a digital music workstation introduced in 1992. Unlike other Yamaha synthesizers of the time the SY85 does not use FM synthesis. Instead, its sounds are based on samples, which can be layered and modified to create new sounds.

Roland XP-80

The Roland XP-80 is a music workstation that uses digital PCM subtractive synthesis and combines an updated version of the JV-1080 synthesizer engine with the sequencer capabilities of the Roland MRC-Pro sequencer. The XP-80 was introduced in 1996 and is now discontinued.

Roland Juno-G Music workstation/synth

Roland Juno-G is a music workstation/synth introduced in 2006 by Roland Corporation. It is based on the Fantom-X series, having a vintage design that resembles the first Juno synthesizers, such as the Juno-106. The Juno-G's main competitors in the approximate price range, with similar features, when first released, were the Korg Triton Le/TR and Yamaha MO6 workstation synthesizers.

The Yamaha V50 is an hybrid music workstation introduced in 1989. It combines a sequencer, rhythm machine, an FM synthesis-based sound module and a MIDI keyboard.

Roland XP-50

The Roland XP-50 is a music workstation that combines the synthesizer engine of Roland's JV-1080 sound module with the sequencing capabilities of their MRC-Pro sequencer and a 61-note keyboard. First released in 1995, the XP-50 and the Roland XP-10 were the first two Roland XP-series products, later joined by the XP-80 and XP-30.

Yamaha SY77

Yamaha SY77 is a 16 voice multitimbral music workstation first produced by Yamaha Corporation in 1989. The SY77 is a synthesizer whose architecture combines AFM synthesis, AWM2 for ROM-borne sample-based synthesis, and the combination of these two methods christened Realtime Convolution and Modulation Synthesis (RCM). The same technology was also packaged in a rack-mounted module released simultaneously, the TG77.

The Roland JD-990 Super JD is a module version of Roland JD-800 synthesizer with expanded capabilities, which was released in 1993. JD-990 is a multitimbral synthesizer utilizing 'wave-table' sample-based synthesis technology. It is equipped with 6 MB of ROM containing sampled PCM waveforms, four sets of stereo outputs that are assignable to individual, internal, instruments, and standard MIDI in/out/through ports. JD-990 has a large LCD display and programming takes place through a keypad on the front panel of the unit. The unit can generate multi-timbral sounds reminiscent of the vintage analogue synthesizers but is also capable of generation of modern digital textures. There are several expansion boards available for JD-990 that can be installed in the provided expansion slot in the chassis of the unit.

Casio's SDSynthesizers were a late-1980s line of analog synthesizers featuring a resonant filter. SD synthesis was traditional DCO-analog synthesis, with the main difference being that some of the SD waveforms' harmonic spectrums changed temporally, or dynamically in relation to the amplitude envelope. SD synthesis is used in six Casio synthesizers and home keyboards released in 1987 and produced until 1991, when Casio exited the synthesizer market completely and focused solely on pure consumer keyboards. Due to some programming limitations plus Casio's poor marketing, the SD synths never gained wide popularity and are now fairly rare in the second-hand marketplace. There still exists a small but devoted fanbase who insist that SD synthesis, particularly as expanded in the high-end model HT-6000, was overlooked and highly underrated and today really rare

Casio CZ synthesizers Family of synthesizers by Casio

The CZ series is a family of low-cost phase distortion synthesizers produced by Casio in the mid-1980s. Eight models of CZ synthesizers were released: the CZ-101, CZ-230S, CZ-1000, CZ-2000S, CZ-2600S, CZ-3000, CZ-5000, and the CZ-1. Additionally, the home-keyboard model CT-6500 used 48 phase distortion presets from the CZ line. The CZ synthesizers' price at the time of their introduction made programmable synthesizers affordable enough to be purchased by garage bands. Yamaha soon introduced their own low-cost digital synthesizers, including the DX-21 (1985) and Yamaha DX100, in light of the CZ series' success.

References

  1. "Alesis QuadraSynth". 2015-06-06. Archived from the original on 2015-06-06. Retrieved 2018-08-22.
  2. "Alesis QuadraSynth". Sound On Sound. May 1994. Archived from the original on 6 June 2015.

Further reading