Soundflower is an open source kernel extension for MacOS, designed to create a virtual audio output device that can also act as an input.
Soundflower is a piece of software that lets us record audio being played from the system. We'd love it if Apple had made it so that we (as developers) can record audio from an application, or from the computer itself but unfortunately and for whatever reason there is no API to do this. Soundflower is not available for Windows but there are some alternatives that runs on Windows with similar functionality. The most popular Windows alternative is JACK Audio Connection Kit, which is both free and Open Source. If that doesn't suit you, our users have ranked 12 alternatives to Soundflower and six of them are available for Windows.
Initial development and maintenance of Soundflower was done by Cycling '74. In 2014, Cycling '74 passed stewardship of Soundflower to Rogue Amoeba, but we ultimately didn't have the time or resources to improve the product.
Thankfully, at the end of 2015, Soundflower's original author Matt Ingalls picked up the baton. Fetch 5k wi. The project can now be found via this GitHub link. If you're looking to use Soundflower, that's the link to visit.
If you've previously used Soundflower, or are simply looking for a reliable tool to route audio between applications on your Mac, you may be interested in Loopback.
Loopback
Loopback is a modern, fully-featured virtual audio device tool of our own. With a robust infrastructure and full support, it's the ideal tool to route audio between applications and more.
Learn more on the Loopback page.
How To Use Soundflower
Free Inter-application Audio Routing Utility for macOS
Soundflower presents itself as one of two audio devices (2ch / 16ch). The 2-channel device is sufficient for most situations.
To send the output of one application to another, select Soundflower as the output device in the first application and Soundflower as the input device within the second application.
If an application does not allow you to specify audio devices, you can make Soundflower the default input or output device inside the Sound panel in the System Preferences, or with the Audio MIDI Setup utility application.
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The 16-channel device is provided for more complex routing situations, and can be used with more than two applications simultaneously if the applications support audio routing to any channel, as Max/MSP does.
Note that Soundflower’s audio channels represent a global audio space. If more than one application is sending its output to the same channel, the audio will be mixed. If you want an application to send and receive audio through Soundflower, (for instance using Max/MSP to manipulate and return another application’s audio) you must send and receive the audio on different audio channels or a feedback loop will be created.
If you are hearing clicks or breakups, try increasing the buffer size of both applications (set within each application).
Applications
Since Soundflower offers a straight forward method of communicating between applications on the Mac, there are a variety of situations where you can employ it.
Podcasting
Soundflower has been used extensively in podcasting by combining separate streams of audio into one source. Instead of recording an interview with Skype and only hearing one voice, Soundflower lets you publish both voices for a complete interview experience.
Cellphone
Use an application called DittyBot and Skype to access your iTunes collection from any cellphone.
Music
Record streaming audio from iTunes into Audacity, or route an audio stream from iTunes to Logic.
Soundflower Windows Download
Soundflowerbed
When using Soundflower to send audio to and from applications, you may find that you are not able to send audio through another device to monitor audio output. In such situations you can use Soundflowerbed, an application that resides in the Finder’s Menubar allowing you to tap into Soundflower channels and route them to an audio device.
Download: Soundflower 1.6.6 Installer (includes SoundflowerBed) -- Use this for OS 10.6 - OS 10.8
https://code.google.com/archive/p/soundflower/downloads
System Requirements
- Soundflower 1.5.1 requires Mac OS 10.5.
- Soundflower 1.4.3 requires Mac OS 10.4.
- Soundflower 1.3.1 requires Mac OS 10.2.8 or later.
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Mac Topics That May Interest You:
VST & Audio Units Plug-ins in Mac OS XSM Pro Audio VFX Software for Intel Mac OS X
How to setup Garage Band, Sound-flower, IAC, VFXApple's Boot Camp
SoundFlower ConfigurationGarageBand Aggregate Device
IAC (Inter-Application Communication) BusAudacity VST Enabler
WACVST (Windows-Mac VST)VSTAU Manager (VST to AU Adapter)
