TONESTAR is an ARP® 2600-inspired synth voice 31 years in the shaping, pre-patched like Pearlman's prodigy, and fully #OutsToOuts in-the-box modular, allowing for highpass/bandpass/notch filter tones, and bristling X-mod effects. Connect CV / gate and twist 'n' switch, or pull its tones and voltages apart one 3.5mm cord at a time. 26 knobs, 7 switches, and 21 jacks make for complex and satisfying signal flow, color and collisions. If it gets reedy, route the triangle wave 'round the VCF, and push dat Sub. Nearly thrilling Out to Outs/Interesting.
26 Knobbed and "Shafted" Potentiometers
VCO: FREQUENCY, PULSE WIDTH, LFO (^), GLIDE, MOD (ADSR), SAW*, SQUARE*, SUB, TUNE; Noise: LEVEL; VCF: FREQUENCY, RESONANCE, TRACK, DRIVE, ADSR, MOD (LFO); LFO: DEPTH (OSC), SPEED; ENVs: (ADSR) ATTACK, DECAY, SUSTAIN, RELEASE, (AR) ATTACK, RELEASE; VCA: FEEDBACK (filter), VOLUME
VCO: OCT (up/down), FREQ/PW, NO VCF; VCF: FREQ/RESO; LFO: TRIANGLE/SQUARE*; ENVs: DRONE, MASTER; VCA: IN/MIX
VCO: TRIANGLE*, SAWTOOTH*, SQUARE*, MIX, 1V/O, MOD IN; NOISE: NOISE (white); LFO: DEPTH, TRIANGLE*, SQUARE*, SPEED; VCF: EXT IN, FIL OUT, MOD IN; ENVs: MOD IN, ADSR OUT, AR OUT, GATE IN; VCA: IN/MIX, VCA IN, OUTPUT
All Controls—arranged in order of signal flow—and Patch Points
FREQUENCY – Oscillator frequency attenuator.
PULSE WIDTH – Variable pulse wave width control.
OCT – +1/-1 octave switch.
LFO (^) – Triangle wave low frequency oscillation to pulse width control.
FREQ/PW – Oscillator frequency, or Pulse (square wave) width to ADSR modulation routing switch. Center off.
GLIDE – Slew generator control.
TRIANGLE*/NO VCF – Triangle to VCA switch—bypasses VCF.
MOD (ADSR) – Oscillation modulation via ADSR control.
SAWTOOTH* – Sawtooth wave attenuator.
SQUARE* – Square wave attenuator.
SUB – Square wave Sub Oscillator attenuator.
TRIANGLE* – Waveform output.
SAWTOOTH* – Waveform output.
SQUARE* – Waveform output.
MIX – Composite waveform output.
1V/O – One volt per octave control voltage input.
TUNE – Master fine tune (approx. -5/+ 5 semitones).
MOD IN – Modulation CV input. Normaled to ADSR; ADSR is replaced when alt. source connected.
NOISE – White noise generator output.
LEVEL – Noise attenuator.
FREQUENCY Frequency, or cut-off attenuator
RESONANCE – Resonance, or Q attenuator.
TRACK – Keyboard/voltage tracking attenuator.
DRIVE – Oscillator output to filter input attenuator.
FREQ/RESO – Filter Frequency, or Resonance to LFO modulation routing switch. Center off position.
ADSR – Filter to ADSR envelope attenuator.
MOD (LFO) – Filter to LFO attenuator.
EXT IN – External audio input.
FIL OUT – Filter audio output.
MOD IN – Frequency or Resonance modulation CV input.
TRIANGLE/SQUARE* – Waveform select switch (triangle core).
DPTH (OSC) – LFO to Oscillator control.
SPEED – Speed or rate attenuator.
DEPTH – Control voltage Input.
TRIANGLE* – Triangle wave output.
SQUARE*– Square wave output.
SPEED – Speed or rate CV input.
ATTACK – Attack stage control.
DECAY – Decay stage control.
SUSTAIN – Sustain stage control.
RELEASE – Release stage control.
DRONE/MASTER – Indefinite/instant sustain, and master mode for ADSR routing switch. Center off.
ATTACK – Attack stage control
RELEASE – Release stage control.
MOD IN – Allows for dynamic modulation of the ADSR, eg., if you want the amount of modulation added to/determined by a external source, jack in; or if you prefer, modulation input to the ADSR routing—use with velocity, or a sequencer: the sequencer could isolate the ADSR amount the amount to a single step in the phrase for example. Exciting. A second external envelope can provide an interesting effect, or the AR (in the box patching).
ADSR OUT – ADSR output.
AR OUT – AR Output.
FEEDBACK – Oscillator/filter feedback loop control.
VOLUME – Master volume control.
VCA/CV – Amplifier control voltage output.
IN/MIX – VCA mix input switch switch (normalled jack). When set to IN, external audio replaces filter output to VCA; when set to mix MIX, filter output is fed along with the filter audio to VCA.
VCA IN – Audio input.
OUTPUT – Main output.
PCB Mounting Scheme - Through-hole.
Filter - Discrete, voltage controlled, 24/db/oct cascaded transconductance low-pass filter, employing six pairs of hand-matched transistors.
Size - 32hp.
Depth - 35mm including connectors.
Power Usage - 130mA, 80mA (+12 / -12)