Studio Electronics Tonestar 8106 Module

Studio Electronics Tonestar 8106 is an ARP 2600-inspired complete synth voice eurorack module with Tim Caswell's 'Jupiter to Juno' filter alchemy, a 6dB/octave hi-pass filter followed by a recreation of the Roland IR3109 module, which is a 4-pole, 24 dB/octave voltage-controlled lowpass filter with voltage-controlled resonance. 3 dual OTAs with similar topology to the BA662 used in the Jupiter 8 (and the IR3109 module) were employed, 1 amp for the hi-pass filter, 4 (with added buffers) for the low-pass, and 1 for the resonance. This filter takes a wide range of input signals and tracks control voltage extremely well.

• Features
• Premium quality analog pre-patched and fully modular all-hardware synth voice
• 27 knobs, 6 switches, 21 patch points in a daring yet ergonomic 32hp module
• Eight octave tracking ARP-, Oberheim- and Moog-styled oscillator with sub-oscillator, octave control, waveform mixing, triangle direct to VCA, and LFO/ADSR modulation of pulse width with dedicated triangle wave for warming/chorusing effects
• 6db/oct hi-pass filter followed by a recreation of the Roland IR3109 module
• Classic ADSR/AR envelope with original 2600 'sustain sink' behavior to keep it movin'
• Ultra wide-ranging voltage-controlled LFO with input speed control
• Master mode: ADSR controls both filter and amplifier envelopes (a la JUNO-106)
• Feedback: harmonic-generating/multiplying oscillator/filter feedback loop manipulation
• White noise generator and external audio input patching with native tonal bleeding
• Legendary Studio Electronics 31-year-perfected through-hole build quality and supreme sound
• Module controls
• VCO
• RANGE knob: oscillator frequency attenuator.
• PW MAN knob: variable pulse wave width control.
• OCT switch: +1/-1 octave switch.
• LFO (^) knob: triangle wave low frequency oscillation to pulse width control.
• FREQ/PW switch: oscillator frequency, or pulse (square wave) width to ADSR modulation routing switch. Center off.
• PORTA knob: slew generator control.
• TRIANGLE (symbol) / NO VCF switch: triangle to VCA switch — bypasses VCF.
• MOD (ENV) knob: oscillation modulation via ADSR control.
• SAWTOOTH (symbol) knob: sawtooth wave attenuator.
• SQUARE (symbol) knob: square wave attenuator.
• SUB knob: square wave sub oscillator attenuator.
• Noise
• LEVEL knob: Noise attenuator.
• VCF
• FREQ knob: frequency, or cut-off attenuator
• RESO knob: resonance, or Q attenuator.
• KYBD knob: keyboard/voltage tracking attenuator.
• DRIVE knob: oscillator output to filter input attenuator.
• HPF: high pass filter.
• ENV knob: filter to ADSR envelope attenuator.
• MOD (LFO) knob: filter to LFO attenuator.
• LFO
• TRIANGLE/SQUARE (symbols) switch: waveform select switch (triangle core).
• AMNT (OSC) knob: LFO to oscillator control.
• RATE knob: speed or rate attenuator.
• ENVs
• A knob: attack stage control.
• D knob: decay stage control.
• S knob: sustain stage control.
• R knob: release stage control.
• HOLD/MSTR switch: indefinite/instant sustain, and master mode for ADSR routing switch. Center off.
• A knob: attack stage control
• R knob: release stage control.
• VCA
• FEEDBACK knob: oscillator/filter feedback loop control.
• VOLUME knob: master volume control.
• Patch points
• VCO
• TRIANGLE (symbol) output: waveform output.
• SAWTOOTH (symbol) output: waveform output.
• SQUARE (symbol) output: waveform output.
• MIX output: composite waveform output.
• 1V/O input: one volt per octave control voltage input.
• TUNE input: master fine tune (approx. -5/+ 5 semitones).
• MOD IN input: codulation CV input. Normalled to ADSR; ADSR is replaced when alt. source connected.
• Noise
• NOISE: White noise generator output.
• VCF
• EXT IN input: external audio input.
• FIL OUT output: filter audio output.
• MOD IN input: frequency or resonance modulation CV input.
• LFO
• AMNT input: control voltage input.
• TRIANGLE (symbol) output: triangle wave output.
• SQUARE (symbol) output: square wave output.
• RATE input: speed or rate CV input.
• ENVs
• MOD IN input: modulation input, allows for dynamic modulation of the ADSR.
• ADSR OUT output: ADSR output.
• AR OUT output: AR output.
• VCA
• VCA CV output: amplifier control voltage output.
• IN/MIX input: 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 input: audio input.
• OUTPUT: main output.
• Physical specifications
• Size: 32hp
• Module depth: 35mm (including connectors)
• Power usage: 130mA @ +12V, 80mA @ -12V