Grp Synthesizer A2

• Two oscillators with 5 waveforms each, the first VCO offers additional PWM at two waveforms, the second VCO a parameter called "Shape" which fades in nine copies of the selected waveform for super-saw and super-triangle sounds. Hard Sync and (exp.) FM
• Ring modulator, noise generator, audio mixer
• Multimode filters with 12db and LP, HP, BP and Notch
• Two envelopes ADSR or AD/A(H)R
• Two LFOs (up to 2,500Hz) with different waveforms
• Simple Arpegiator and Sample and Hold
• MIDI integration

Grp Synthesizer A2

Un piccolo grande sintetizzatore analogico nella tradizione del suono Grp. Largo 8 spazi verticali 5U, montato nel suo cabinet dai rigorosi fianchetti in massello di ciliegio, con connessioni MIDI e Analog CV/Gate. Questa bestiolina ha due potenti oscillatori con le classiche forme d'onda Grp, più Super Saw e Super Triangle; il potente filtro Grp State Variable 12 dB, un Ring Modulator (avete mai provato a modulare ad anello una Super Saw a nove componenti?), un Noise Generator, un Amplificatore e una coppia di splendidi Vumeter analogici. Poi c'é una coppia di Envelope Generator, quello del filtro ha il loop engine già sperimentato nell'A4 Analog Synthesizer, e una coppia di LFO/Modulation routing. L'arpeggiatore di bordo è semplice da usare, può essere pilotato da Clock Interno, MIDI o External Analog, e offre diversi trucchetti divertenti. Grp A2 Analog Synthesizer è costruito come un carro armato. Ma è molto più pericoloso.

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Specifiche Tecniche

Voltage Controlled Oscillator 1, 2

Wide audio range (32’-2’) w. Tune & Fine Five analog waveforms (Triangle, Triangle & Saw summed, Saw, Saw & Variable Pulse summed, Variable Pulse);  SuperSaw and SuperTriangle (only VCO2) manual PW & PWM; FM Exp w. Amt (from VCLFO1, LFO2, VCO1, 2,  Noise, RM, S&H,EG1, EG2, Aft, ModW, VCF Out) w. phase rev Hard sync (VCO 1 master) Kybd on/off

Ring Modulator

Ring Mod Sources: VCO1  & VCO2.

Noise Generator

White Noise.

Audio Mixer

Separate level controls for VCO 1, 2, Ring Mod, Noise.

Filter Section

12 dB/Oct State Variable Mode (12dB HP, 6 dB BP, 12 dB LP, 6 dB Notch) Cutoff Frequency; Resonance FM Amt (from   VCLFO1, LFO2, VCO 1, 2,  Noise, RM, S&H, EG2, Aft, ModW, Bend) Kybd Track 0-120% Distortion. Filter section can be configured in  Direct Out (LP goes on Left Audio Out, HP goes on Right AudioOut).

Voltage Controlled Amplifier

Dedicaded Envelope Generator (see below) Control Selection (dedicated EG2, ON-hold, External CV)

Stereo Main

Master Volume, analog Vu-meters.

Envelope Generator 1

Multi Stage Loopable Env (Attack, Decay, Sustain Lev, Sustain Time-Only in Loop On, Release); EG Amt EG time goes from 1msec to 20 sec. Loop Envelope: loop from Attack to Release, w. Sustain Time selectable. Loop Mode Switch: Loop Off: EG as standard ADSR, no Sustain Time. Gate: EG loops from A to S (w. Sustain Time max 60”) as long as Gate is On. Auto: EG full loop, from A to R; independent  from Gate.

Envelope Generator 2

Attack ,Decay/Release

Voltage Controlled Low Frequency 1

Frequency (from very low to 2500 Hz) Waveform (Square, Triangle, Saw, Ramp) FM Amt , FM Sources (Key, LFO) Key Sync (Off – On) Shaping LFO out (from: Hold,Aft,ModW)

Voltage Controlled Low Frequency 2

Frequency Freq Range (Low-Mid-High) Waveform (Triangle, Square) Shaping Select (Hold, Aft, ModW) Indipendent Send Modulations for: VCO 1, 2; VCF Cutoff.

Sample & Hold

Frequency Frequency Source (Int, Gate,Ext) LED Frequency S&H Source (Noise, LFO2) The S&H Clock can be routed to EG firing; there are three options: Off – no routing; Gate – the S&H clock is ANDed with keyb/ext/manual Gate; Auto – EGs always fired from S&H. Tuning - Midi Master Tune Portamento Time Bend Amount VCO 1 Portamento On/Off VCO 1 Bend On/Off Hold On/Off Midi to CV On/Off MIDI Interface: MIDI channel set at Power-On w. First MIDI Note received A2 receives: MIDI Note On/Off, Bend, Modulation, Aftertouch, Damper, MIDI Clock.

Arpeggiator

Frequency and PW Gate (Legato/Staccato) Controls Run/Stop user’s selectable, Hold Mode for latching arpeggio Selectable Advance Mode (Up, Down, U/D, Random); Arpeggio Step Repeat (1x no repeat, 2x, 3x); Arpeggio Octave Range (x1, x2, x3, x4) Arpeggio Clock Source Selectable (Internal, External Analog Pulse, MIDI Clock) Arpeggio Step Size (quarter note, eight note, sixteen note)

Connections

Audio: Stereo Phones Out; Left/LP Out; Right/HP Out. CV Control In 1: Tip = Filter Cutoff CV In / Ring = LFO 1 Rate CV In CV Control In 2: Tip = Amp Level CV In / Ring = VCO 2 Frequency CV In External Analog Keyboard In: CV 1 (1V/Oct), Gate In (0/+5V) ARP/S&H Clock In: External Clock In