JSyn Unit Generator Overview

Arithmetic and Logic

• AddUnit - output = inputA + inputB, clipped between -1.0 and <1.0.
• CompareUnit - output = ( inputA > inputB ) ? 1.0 : 0.0;
• DivideUnit - output = inputA / inputB
• LatchUnit - output = (Gate > 0.0) ? Input : previous-output; used for sample and hold.
• MaximumUnit - output = ( inputA > inputB ) ? inputA : inputB. Useful for clipping.
• MinimumUnit - output = ( inputA < inputB ) ? inputA : inputB. Useful for clipping.
• MultiplyUnit - output = inputA * inputB
• MultiplyAddUnit - output = inputA * inputB + inputC
• MultiplyAddUnsignedUnit - output = inputA * inputB + inputC. C and output are Unsigned.
• MultiplyUnsignedUnit - output = inputA * inputB. A, B and output are Unsigned.
• SchmidtTrigger - Comparator with hysteresis (separate Set and Reset levels).
• SelectUnit - output = ( select > 0.0 ) ? inputA : inputB;
• SubtractUnit - output = inputA- inputB, clipped between -1.0 and <1.0.

Control

• CrossFade - Cross fade smoothly between two inputs.
• ExponentialLag - output approaches Input exponentially.
• EnvelopePlayer - Play linear segments of an envelope.
• FourWayFade - Cross fade smoothly between four inputs.
• PanUnit - Pan a mono signal between two outputs.
• ParabolicEnvelope - Generate an arcing envelope useful for granular synthesis.
• PeakFollower - Tracks the peaks of an input signal.

Filters

• Filter_1o1z - output = y(n) = A0*x(n) + A1*x(n-1), first order, one zero.
• Filter_1o1p - output = y(n) = A0*x(n) - B1*y(n-1), first order, one pole.
• Filter_1o1p1z - output = y(n)  = A0*x(n) + A1*x(n-1) - B1*y(n-1), first order, one pole, one zero. (allpass)
• Filter_2o2p - output = y(n) = A0*x(n) - B1*y(n-1)  - B2*y(n-2), second order, two pole. (reson)
• Filter_2o2p2z - output = y(n) = 2.0 * (A0*x(n) + A1*x(n-1)  + A2*x(n-2) - B1*y(n-1)  - B2*y(n-2)), second order, two pole, two zero.
• Filter_BandPass - passes frequencies within a narrow band.
• Filter_BandStop - passes frequencies within a narrow band.
• Filter_HighPass - resonant biquad, cuts out lower frequencies.
• Filter_HighShelf - resonant biquad, cuts out higher frequencies with a flat response below the knee.
• Filter_LowPass - resonant biquad, cuts out higher frequencies.
• Filter_LowShelf - resonant biquad, cuts out lower frequencies with a flat response below the knee.
• StateVariableFilter - State Variable Resonant Filter with LowPass, BandPass and HighPass outputs.

Miscellaneous

• DelayUnit - output = Input delayed by specified amount.
• InterpolatingDelayUnit - output = Input delayed by variable amount.
• BusReader - Has a BusInput and a normal output. Useful for mixing several signals.
• BusWriter - Has a normal Input and a busOutput. Useful for mixing several signals.
• LineOut - Input[0:1] goes to global mixer then to DAC.
• LineIn - Output[0:1] come from a microphone or Line Level input.
• WaveShaper - Interpolate value from table. Used for wave shaping, function lookup.

Noise

• RedNoise - Linearly interpolate between noise values with Frequency control.
• WhiteNoise - output = random value evenly distributed between -1.0 and <1.0.

Oscillators

• ImpulseOscillator - Impulse train with Frequency and Amplitude control. Sharp spikes.
• ImpulseOscillatorBL - Impulse train with Frequency and Amplitude control. Sharp spikes.  (Band Limited version)
• PulseOscillator - Pulse wave oscillator with width control.
• PulseOscillatorBL - Pulse wave oscillator with width control. (Band Limited version)
• SawtoothOscillator - Sawtooth wave oscillator. Harsh.
• SawtoothOscillatorBL - Sawtooth wave oscillator. Harsh. (Band Limited version)
• SineOscillator - Sine wave oscillator. Pure smooth tone.
• SquareOscillator - Square wave oscillator. Buzzy.
• SquareOscillator - Square wave oscillator. Buzzy. (Band Limited version)
• TableOscillator - Arbitrary waveform. Controlled by Frequency, not SampleRate.
• TriangleOscillator - Triangle wave oscillator. Almost as smooth as sine wave.

Sample Related

• SampleReader_16F1 - Play 16 bit mono sample at a fixed rate.
• SampleReader_16F2 - Play 16 bit stereo sample at a fixed rate.
• SampleReader_16V1 - Play 16 bit mono sample at a variable rate, linear interpolation.
• SampleWriter_16F1 -  Input written to SynthSample serving as delay line for echo/reverb/delay effects.
• SampleWriter_16F2 -  Input written to stereo SynthSample serving as stereo delay line or for capturing a performance..

 

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Possible Units for Future Development

• Math_Integrator - output = output+Input, useful for inexpensive ramps.
• Ramp_Linear - Linear envelope segment generator.
• Lag_Linear - output = Input with limited rate of change .
• Lag_Peak - output tracks Input peaks with exponential decay.
• CUBIC_AMPLIFIER - Non-linear amplifier for "fuzz box" effects.
• DELAY4 - output[3] = output[2], ..., output[0] = Input, for filter construction.
• DELAY_F2 - Input[0:1] written to DelayLine for stereo delay effects.
• DEPOPPER - Used to reduce pops when stop() and start() called.
• EXPONENTIAL_ENVELOPE - Exponential envelope segment generator.
• EXPMOD_UNSIGNED - output = input*(2.0**modulation)), for pitch modulation.
• SAMPLER_16_V2 - Play 16 bit stereo sample at a variable rate, linear interpolation.
• SAMPLER_8_F1 - Play 8 bit mono sample at a fixed rate.
• SAMPLER_8_F2 - Play 8 bit stereo sample at a fixed rate.
• SAMPLER_8_V1- Play 8 bit mono sample at a variable rate, linear interpolation.
• SAMPLER_8_V2- Play 8 bit stereo sample at a variable rate, linear interpolation.
• SAMPLER_ULAW_F1 - Play 8 bit mono sample at a fixed rate.
• SAMPLER_ULAW_F2 - Play 8 bit stereo sample at a fixed rate.
• SAMPLER_ULAW_V1 - Play 8 bit mono sample at a variable rate, linear interpolation.
• SAMPLER_ULAW_V2 - Play 8 bit stereo sample at a variable rate, linear interpolation.
• SAMPLER_DRIFT_V1 - 16 bit sampler used for variable length delay effects
• SAMPLER_RAW_F1 - Play 16 bit mono sample at a fixed rate with no Amplitude control.
• TAP_OUTPUT - output[0:1] is current sum of all mixers and LineOuts.

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