Introduction

It consists of the following parts:

• Oscillator block
• Filter block (with its own envelope)
• Amp block (ditto)
• 2 independent assignable LFOs

Oscillators

Infector has got an oscillator section, which consists of two regular oscillators (called OSC1 and OSC2) and a sub-oscillator. Both regular oscillators have built in Pulse Width Modulation (PWM) "circuitry", which can adds some "moving" quality to the sound. OSC2 can be detuned from OSC1, for improved "phatness" (transposing and detuning effects). You can also change balance between these oscillators (relative volume of OSC1 and OSC2). Both oscillators have a variety of built-in waveforms (simple ones - like sine or sawtooth wave, or more complex - like SuperSaw). You can also create waveforms yourself - using user waveform slots.

The user waveforms are divided into 4 double slots - A, A', B, B', C, C' and D,D'. For plain PWM use only half of a slot (oscillator waveform set to A, B, C, D). You can also set up two waveforms in the same slot (for example, A and A'), and set the oscillator waveform to mixed mode (AA'). Then the oscillator plays both waveforms at once, with a phase shift controlled by PWM LFO. It might give interesting effects if the waveforms have similar harmonic content.

The sub-oscillator is a simple oscillator tuned always octave down the note frequency. It has no PWM or transpose/detune controls, but you can change its volume and waveform (user waveforms are allowed, too).

Filter

The synthesizer is equipped with a single 6-pole multimode filter, with a built-in ADSR envelope generator. The filter can be set to different modes, including 36dB/oct lowpass (6L), 24dB/oct lowpass (4L), 12dB/oct lowpass (2L), triple 6-pole notch (Notchez), 36dB/oct highpass (6H), 18dB/oct bandpass (6B), and mixed filter (6X). Except that distinction, some of filter modes have different versions (like 6L have Multipeak, Separated and HiSquelch variants).

Every filter has two parameters - Cutoff and Resonance. Cutoff always controls the filter's cutoff or center frequency (or frequencies), and resonance is used for different parameters in specific filters (however, it usually controls width or height of resonant peaks). The filter cutoff frequency is controlled by the envelope generator. Two parameters control modulation amount and modulation shape (ie. how envelope generator's output affects the cutoff frequency). Filter cutoff can be also linked to note pitch, with the Keytrack parameter. Keytrack of 0ct means no keytracking, while Keytrack of 100ct means that pitch change of one octave up causes cutoff change of one octave up.

LFO

LFOs in Infector are used for controlling filter parameters. LFO1 is connected to filter cutoff and envelope modulation amount, while LFO2 is connected to filter cutoff and resonance. While it may seem "suboptimal", it's pretty effective because oscillators' PWM is linked to the separate PWM LFOs, making LFO to PWM path unnecessary (which also frees LFO1 and LFO2 from PWM-related duties). Both LFOs have a variety of different shapes, like sine, triangle, saw up and down, square, steps and special sample-and-hold (random) modes. LFO outputs are smoothed out to avoid rapid filter parameter changes (which might cause all those famous clicks and pops).

Commands

Synth modes