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"The Grp Synthesizer A4 is a direct descendent of the flagship A8, providing the same analog sonic power and flexibility at a fraction the price. Ideal for everything from smooth Minimoog-like leads to distorted, tearing bassline sequences, the A4 is equipped and ready.
Its three oscillators with various modulation and sync options, dual filters with integrated distortion, powerful modulation sources, and integrated 8x2 sequencer make it perfect for everything from classic monosynth sounds to intricate polyphonic sequenced or generative soundscapes.
Eschewing patch cables or modulation matrices, the A4 instead relies on switches and knobs for signal routing and attenuation, making it quick and easy to reach new (and even unexpected!) sounds while keeping the user interface uncluttered and accessible. Round this all out with inherent MIDI support, external CV/Gate access, external audio input, and a beautiful wood cabinet with rock-solid construction, and it becomes apparent that the A4 is not just a cool synth for the moment: it is a destined classic.A4 FEATURES
Three VCOs with vast modulation, sync, and tuning options
Dedicated Ring Modulator for internal and external signals
Noise generator switchable between White and Pink
External input with plenty of gain for line and mic-level signals
Dedicated envelope follower and comparator for External Input
Audio mixer with level controls for all sources
Dual analog filters: one 24dB/oct Transistor Ladder LPF with pole selection, one 12dB/oct state-variable filter
LPF offers multiple slope choices and three FM inputs, and distortion
SVF offers mode selection, three FM inputs, and distortion
VCA with dedicated envelope generator and control selection
Autopan section with controllable panning rate
One looping AHDSR-style envelope with selectable gate source, pre-routed to sensible destinations
Second envelope with all the features of the first, barring the Hold segment
Two voltage-controllable LFOs with a variety of waveforms and destinations
Sample & Hold with internal and external clock options and selectable sample input sources
Master tuning controls
Built-in MIDI interface accommodates note messages, pitch bend, modulation CC, aftertouch velocity, and more
Built-in Step Sequencer with 8x2 and 16x1 modes, multiple directions, built-in clock divider, step repeat, permutations, and more"
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