Concept:

The app is AUv3 instrument that emulates the so-called “BassDrum” of analog drum machine. In addition there is MIDI OUT functionality of Envelop Follower, that is, the user can send out this instrument's unique envelop via midi CC for modulating external plugins.

System Requirements:

AUv3 host that has a flexible capability of MIDI routing (AUM, apeMatrix, etc)

Usage:

There are seven sliders & one button.

Tune: BassDrum’s fundamental frequency (30hz - 160hz). text-editable.
Decay: determines its duration.
Amp: audio’s decibel representation.
MIDI OUT: whether the functionality of envelop follower is turned on or off (default: off)
MIDI Gain: gain amount of MIDI out
Offset: balances the output parameter’s value
MIDI CC: determines the destination MIDI CC number. text-editable
Button: triggers the instrument.

Recommended Scheme:

drum machine (MIDI out) -> “pOus” -> audio effect (compressor, saturator etc)