Growler

Growler generates bursts of square or variably rounded pulses.

Pulses can be tuned to varying width, spacing, rounding, or up/down balance. The parameters can vary over each burst, creating spectral sweeps.

This is not a friendly module.
The params interact in surprising ways and it's usually not obvious what the main pitch will be.

Recommendation: Always connect output to an Oscilloscope, to see where you are going.

Band-limited output saves filtering - you can drive FM, or create both gnarly and smooth bass sounds.
Growler can also be useful for dynamic stutter envelopes.

Param Overview

There are 2 levels of parameters:
Burst control, and pulse shape within each burst.

Each shape param has a change control (smaller knob).
This increases or decreases amount for each new pulse in the burst.

Burst Generation

A burst is a series of bipolar pulses with variable interval, shape and amp.

Burst rate is the primary rate control, this cuts short any further pulses.
Set 0 rate to wait for gate or sync trigger.

Pulse count 1 - ∞ (for as long as Burst rate allows)

Pulse interval 0 - 10 sec. This affects base pitch.

Dynamics controls amplitude inc/dec over the burst. First or last pulse is always max amp.

Pulse Shape

Pulses are bipolar (possible to tweak to unipolar).

Pulse width is 0 to 1 sec. This affects basic pitch and overtones.

Pulse slope or rounding sets smoothness. This affects pitch, and cuts overtones smoother than a low-pass filter.

Symmetry sets relative width of up / down pulses. This affects overtones (narrow pulse is sharper).

Polarity: Relative amp of up and down pulses. This can be shifted to postiive-only or negative-only.

Output and B channel

Gate width: Controls when gate output signal opens.
Range from start of pulse regardless of smoothing, up to stricly on "flat" part of each pulse.

The B channel is offset by optional delay, and by up-down polarity. This allows stereo separation.

Smoothing

Edge knob (small, bottom-left) controls minimal smoothing. Range 0-30 samples. This affects how high pulse rate can go.
If Edge is less than 3-4 samples, output will not be bandlimited.