Audio Hijack: capture, process, and send audio to your live

What Audio Hijack brings to your live shows

Audio Hijack does more than route: it builds an audio chain (sources → effects → outputs) you enable with one click.

Audio Hijack or Loopback alone?

Prerequisites

• macOS 14.4 or later for Audio Hijack 4.5+ (Intel or Apple Silicon)
• Audio Hijack license or trial from <a href="https://rogueamoeba.com/audiohijack/" target="_blank" rel="noopener noreferrer">rogueamoeba.com/audiohijack</a>
• <strong>BlackHole 2ch</strong> (<a href="/help/blackhole">guide</a>) or a <strong>Loopback</strong> device (<a href="/help/loopback">guide</a>) to bridge to the browser
• Up-to-date Chrome, Firefox, or Safari for Gniark Live

Install Audio Hijack

1. 1Download Audio Hijack from Rogue Amoeba and install it in Applications.
2. 2On first launch, grant System audio access (required).
3. 3If you capture a mic, also grant Microphone access when Audio Hijack requests it.
4. 4Install BlackHole or Loopback first if not already done.

macOS permissions

Open the Permissions window from the Audio Hijack menu to verify system audio access is active. Without it, Application blocks capture nothing.

Create the bridge to Gniark Live

Gniark Live reads a microphone in the browser. Audio Hijack must send its output to a virtual device visible as an input:

1. 1Option A (free): install BlackHole 2ch (see BlackHole guide).
2. 2Option B: create a dedicated Loopback device (e.g. Gniark Live Out).
3. 3Note the exact device name: you will find it in the Gniark Live audio selector.

Configure a "Gniark Live" session

1. Create the session

1. 1Open Audio Hijack → New Session.
2. 2Start from a blank template or the Podcast / Web Audio template as a base.
3. 3Rename the session (e.g. Gniark Live) for quick access.

2. Voice + application (typical setup)

1. 1Add an Input Device block and select your mic.
2. 2Add an Application block and choose your player (Spotify, Apple Music, Safari…).
3. 3Insert a Mixer block to combine both sources if needed.
4. 4Add an Output Device block set to BlackHole 2ch or your Loopback device.
5. 5Optional: second Output Device to headphones for monitoring (keep volume low to avoid echo).

3. Effects and levels

Drag effect blocks between sources and the Mixer or output: Channel EQ, Compressor, Gain… Adjust levels in each block to avoid clipping (watch the meters).

Run the session and open Gniark Live

1. 1In Audio Hijack, click Run on your session: audio flows through the chain to BlackHole / Loopback.
2. 2Open Gniark Live and start your stream.
3. 3Allow the microphone in the browser, then choose BlackHole 2ch or your Loopback device.
4. 4Play music and speak: check meters in Audio Hijack and viewer feedback.
5. 5When finished: Stop in Gniark Live, then Stop the Audio Hijack session.