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Library of Heavy compatible abstractions

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# heavylib

Library of [heavy](https://github.com/Wasted-Audio/hvcc) compatible abstractions.

See the -help.pd patches for more information on each object.

## Synthesis

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### Band-limited oscillators

`[hv.osc~ saw]` - Band-limited PolyBlep sawtooth signal generator. [_more info_](https://github.com/cfloisand/pd-polyblep/blob/master/Source/polyblep~.c)

`[hv.osc~ sine]` - Same as Pd `[osc~]` added for convenience.

`[hv.osc~ square]` - Band-limited PolyBlep square signal generator.

### LFOs

These precision LFOs have control rate inlets and outlet, however they sample from signal rate oscillators and require DSP to be on.

They give a float output between `0.0` - `1.0`. Because we `[snapshot]` every 1ms we get aliasing when we enter audio range frequencies.

`[hv.lfo sine]` - Control `[snapshot~]` of  slow `[osc~]`.

`[hv.lfo ramp]` - Control `[snapshot~]` `[phasor~]`.

`[hv.lfo saw]` - Control rate sample and inverted `[phasor~]`.

`[hv.lfo square]` - Amplified and clipped `[osc~]`, has phase offset.

`[hv.lfo pulse]` - Band-limited PolyBlep square signal generator, taken from `[hv.osc~ square]`, instead of phase offset we get pulse width modulation.

### Noise

`[hv.pinknoise~]` - Cheapish pinknoise generator. [_more info_](http://www.firstpr.com.au/dsp/pink-noise/)

### Envelopes

`[hv.vline~]` - Envelope generator, replacement for Pd's [vline~] object.

## Processing

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### Dynamics

`[hv.compressor~]` - Compressor unit with Threshold and Ratio parameters. (Attack/Release is fixed at 40ms)

`[hv.compressor2~]` - Stereo version of `[hv.compressor~]`.

`[hv.envfollow~]` - Cheap envelope follower.

### Effects

`[hv.comb~]` - Comb filter effect unit.

`[hv.flanger~]` - Flange effect unit.

`[hv.flanger2~]` - Stereo version of `[hv.flanger~]`.

`[hv.freqshift~]` - Frequency shifter effect unit.

`[hv.reverb~]` - Simple reverb unit.

### Filtering

The default `[hv.filter~]` abstractions use control rate inputs and coefficient calculation. There are `[hv.filter.sig~]` alternatives that allow signal input.

`[hv.filter~ allpass]` - Allpass filter with Q control (Biquad).

`[hv.filter~ lowpass]` - Lowpass filter with Q control (Biquad).

`[hv.filter~ highpass]` - Highpass filter with Q control (Biquad).

`[hv.filter~ bandpass1]` - Bandpass filter with Q control, peak gain = Q (Biquad).

`[hv.filter~ bandpass2]` - Bandpass filter with Q control, constant 0dB peak gain (Biquad).

`[hv.filter~ notch]` - Notch filter with Q control (Biquad)

`[hv.filter.gain~ peak]` - Peaking filter with Frequency, Q and Gain parameters (Biquad).

`[hv.filter.gain~ lowshelf]` - Low shelving filter with Frequency, Q and Gain parameters (Biquad).

`[hv.filter.gain~ highshelf]` - High shelving filter with Frequency, Q and Gain parameters (Biquad).

`[hv.lop~]` - Lowpass variant with signal controlled cutoff (rpole~).

`[hv.hip~]` - Highpass variant with signal controlled cutoff (rpole~).

## Math Operations

---

`[hv.exp~]` - Signal-rate exponential ( exp ), alternative implementation.

`[hv.eq~]` - Signal-rate equal ( == ).

`[hv.neq~]` - Signal-rate not equal ( != ).

`[hv.gt~]` - Signal-rate greater than ( > ).

`[hv.gte~]` - Signal-rate greater than or equal to ( >= ).

`[hv.log~]` - Signal-rate natural logarithm ( ln ).

`[hv.lt~]` - Signal-rate less than ( < ).

`[hv.lte~]` - Signal-rate less than or equal to ( <= ).

`[hv.multiplex~]` - Mix between two input signals based on a comparator.

`[hv.pow~]` - Signal-rate exponent ( x ^ y ), alternative implementation.

`[hv.tanh~]` - Static non-linear waveshaper.

## Logic

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`[hv.dispatch]` - Utility for organising parameter interfaces to other abstractions.

`[hv.drunk]` - Randomised walk number generator.

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