Mimicking a "Gater" effect from GarageBand for iOS?

I’m trying to find a way to replicate the Gater FX from GarageBand for iOS (https://support.apple.com/kb/PH24848?locale=en_US&viewlocale=en_US The slider parallel to the Downsampler slider). In layman’s terms, it alternates between the current volume and 0db (I think) at a rate based on the song’s tempo.

Here’s a song I made that uses Gater. https://drive.google.com/file/d/1FyPc5xq5-0Z7rJGKOlE4WM0A9qiCBjSs/view?usp=sharing
The Gater is in effect for a total of half the song’s runtime.

Upside down. When dealing with audio signal levels, 0dB is “full volume” and signals lower than this are negative values. Absolute silence is “negative infinity” dB.

The tempo is not directly the “cause” that triggers the effect. “Gater” is a kind of “Noise Gate” effect, which is triggered by the amplitude (level) of the audio. When the audio is above a specified level, the gate opens and allows the sound through, when the audio falls below that level, the gate closes and mutes the sound.

There is a Noise Gate plug-in for Audacity available here: Missing features - Audacity Support
Installation instructions: https://manual.audacityteam.org/man/installing_effect_generator_and_analyzer_plug_ins.html

I’m well aware that tempo doesn’t “trigger” the gate, but it’s not a noise gate that I’m looking for. The GB Gater doesn’t work like the Noise Gate; it’s something that takes effect when the user puts their finger somewhere on that slider. Then, during recording over the existing music, GB takes that input, processes it, and applies it as a seperate FX layer that can be moved or adjusted.

I’m…not making myself very clear, am I?

Try the Noise Gate with “Level reduction” set to -100 and “Gate Threshold” set to around -6dB and see what happens.

Tried toying with the Tremolo effect instead, and it’s pretty close to what I’m looking for. Especially the “square” waveform type.

On the other hand, I can’t figure out how to make the Noise Gate start with the Nyquist prompt.

Normally you would install a Nyquist Plug-in, and then launch it from the appropriate menu (Generate, Effect, Analyze or Tools) in the same way as you would launch a built-in effect. By default, plug-ins are listed at the bottom of the menus.

Instructions for installing Nyquist Plug-ins on Windows: https://manual.audacityteam.org/man/installing_effect_generator_and_analyzer_plug_ins_on_windows.html#nyquist_install

yeah thx