JACK is a professional sound server daemon that provides real-time low latency connections for both audio and MIDI data between applications that implement its API. The API can be used through either JACK1 or JACK2.

The best free alternative to Sound Siphon is JACK Audio Connection Kit, which is also Open Source. If that doesn't suit you, our users have ranked more than 10 alternatives to Sound Siphon and five of them is free so hopefully you can find a suitable replacement. Other interesting free alternatives to Sound Siphon are BlackHole Audio Loopback Driver, Soundflower, SoundDesk Virtual Devices and Sound Siphon Audio Unit.
JACK is a professional sound server daemon that provides real-time low latency connections for both audio and MIDI data between applications that implement its API. The API can be used through either JACK1 or JACK2.

BlackHole is a modern macOS virtual audio driver that allows applications to pass audio to other applications with zero additional latency.



Soundflower is a Mac OS X system extension that allows applications to pass audio to other applications. Soundflower is easy to use, it simply presents itself as an audio device, allowing any audio application to send and receive audio with no other support needed.

The SoundDesk Virtual Devices are connectors that you can use to route audio across apps.




Sound Siphon: Audio Unit routes application and system audio straight into AU hosts like Logic Pro, Ableton Live, REAPER, and Sessions — in real time.



easiest and free solution. In mac os settings, set imput and output to Blackhole (virtual device) and use any program like Audacity to rec the audio!