FAC Envolver
"Being a MIDI effect in its essence, controlling your synthesizers parameters (e.g. volume, cutoff, res) with MIDI CC and notes, FAC Envolver is also able to transform the input audio via two exclusive effects: a Noise Gate and a Trance Gate." from the App Store description.
App type: App and AUv3
App store link: 
FAC Envolver
Developer: Frederic Corvest
Developer AB Forum Handle: @FredAntonCorvest
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