![]() Control over these presets is limited to octave balance, envelope attack, and LFO modulation depth and rate. The Polymoog Keyboard features more presets than its predecessor: " vox humana", "string 1", "string 2", " electric piano", "piano", " honky tonky", "clav", "harpsi", "brass", "chorus brass", " pipe organ", "rock organ", "vibes", and "funk". The right-hand control panel is absent, while the left-hand panel has only a few sliders, giving the user less control over the sounds. ![]() The two are similar in appearance, sharing the same case and keyboard. The Polymoog Keyboard 280a is a stripped-down version of the original 1975 Polymoog. Although criticized for its limited programmability, high purchase price of $5295 and reliability issues, the Polymoog Synthesizer was popular with musicians of the period, and its unlimited polyphony was considered revolutionary upon its initial release. Unlike later 1970s polyphonic synthesizers, such as the Yamaha CS-80 and Sequential Circuits Prophet-5, the Polymoog cannot create each voice from individual oscillators and filters, or store sounds programmed by the user. The design of the Polymoog is a hybrid of the electronic organ and the synthesizer using divide-down technology, much like other string synthesizers of the time. Presets were factory created as physical circuit cards and may be modified for live performance using Var(iation) buttons, triggering a red dot next to the preset number in the display. The user can adjust the instrument's sounds, and it offers presets named " strings", " piano", " organ", " harpsichord", " funk", " clav", " vibes", and " brass". Ranks and waveforms of all notes are also adjustable combining waveforms, octaves, tunings, and their own independent LFO rates and amounts. ![]() The Moog-designed 24 dB/octave filter section allows modulation modulated from its own envelopes, low frequency oscillation and sample and hold circuit. It also has a three-band resonant graphic equalizer section, which can be changed to a low/bandpass/high-pass filter. The Polymoog has a 71-note weighted Pratt & Read touch-sensitive keyboard divided into three sections with a volume slider for each.
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