— Tutorials · Logic Pro

arna in
logic pro.

How to install, validate, and use Arna as an Audio Unit in Logic Pro on macOS. Five steps, five minutes, no padding.

  1. install the au component

    Move the Arna1snob.component bundle into ~/Library/Audio/Plug-Ins/Components/. Always remove the old bundle first (rm -rf) — never copy over an existing .component, or Logic will refuse to validate.

  2. launch logic and let au validation run

    Logic Pro automatically validates Audio Units on launch. Accept the validation prompt for Arna — the first launch takes a couple of seconds. If validation fails, run auval -v aufx ARN1 1snb in Terminal to see the actual error.

  3. insert arna on a track

    Open the channel strip on a vocal or drum bus, click an Audio FX slot, choose Audio Units → 1snob → Arna1snob. The plugin opens at k = 0.30 (Room).

  4. automate the knob

    Hit A to show automation lanes. From the parameter dropdown choose Arna1snob → Knob. Draw a slow ramp from 0.20 to 0.70 across a chorus and you have tape-like breathing reverb.

  5. freeze the tail (full edition)

    In Full mode, automate the Freeze button on a transition — the network feedback goes to unity gain and the tail is mathematically infinite. Ride the Mix knob to fade it back in or out.

— Logic-specific notes

things only logic users care about.

  • AU cache: if Arna doesn't appear after install, delete ~/Library/Caches/AudioUnitCache/ and relaunch Logic.
  • Channel EQ + Arna:place Arna after the EQ on a vocal so the brain analyses the EQ'd signal.
  • Stereo Out:Arna's width control is post-network — mono compatibility is preserved at any width setting.
  • Track Stack: insert Arna on the summed track of a stack to give the whole stack one cohesive room.
  • Side-chain: Arna does not consume a side-chain — the brain analyses the direct input.

Install Arna → · Other DAW tutorials →