Soundflower

Soundflower

Soundflower is a free, open source MacOS system extension that allows applications to pass audio to other applications. It's useful for routing audio between audio apps, recording system audio, and more. Soundflower creates a virtual audio interface with 2 channels that can
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audio routing virtual-audio interapp-audio

Soundflower: MacOS Audio Routing Extension

Free, open source system extension for routing audio between applications, recording system audio, and more, creating a virtual audio interface with 2 channels.

What is Soundflower?

Soundflower is a free, open source MacOS system extension that creates a virtual audio interface to allow applications to transmit audio to other applications in real-time. Developed by Cycling '74, Soundflower functions as an intermediate step in an audio routing setup, enabling users to take audio output from one app and send it as an input to another app.

Some key features and uses of Soundflower include:

  • Route audio between applications like Spotify, Logic Pro, Audacity, Ableton Live, etc.
  • Record any audio from your Mac's system sounds or applications
  • Set up audio effects chains by sending audio from one effect app to another
  • Capture audio from streaming sites, videos, games, and more

Soundflower installs drivers to create a 2-channel virtual audio device on your Mac. Applications can then transmit audio to this virtual interface where it can be received as an input source by other apps in real-time. This makes it easy to grab audio from anywhere in your system and manipulate it however you like.

Though powerful, Soundflower can have a bit of a learning curve in setting up complex audio routing workflows. So while it's very versatile, it may be overkill for basic tasks. But for advanced audio routing it's an indispensable tool for macOS users and audio production.

Soundflower Features

Features

  1. Allows routing audio between applications
  2. Creates a virtual audio interface with 2 channels
  3. Can be used to record system audio
  4. Works as a system extension on MacOS

Pricing

  • Open Source

Pros

Free and open source

Simple to setup and use

Allows flexibility in audio routing

Can enable audio recording from any app

Cons

MacOS only

Can introduce latency

Requires restarting apps to change routing

Can be complicated for non-technical users


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