Soundflower is an open source kernel extension for MacOS, designed to create a virtual audio output device that can also act as an input.
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.
So, Soundflower is a program that allows you to internally route audio via “virtual audio cables” (file paths) from your computer’s system output to recording software. Soundflower creates a virtual “audio device” on your machine that your audio system can see. This download provides the Realtek. High Definition Audio Driver for the 3.5mm audio jack on the Intel® NUC Kits NUC8i7HxKx. This audio driver is required if you plan to connect a microphone or headset to the audio jack or want to use the TOSLINK connection on the back of the Intel NUC. Download the 'Compiled for Windows' version, titled setupespeak-1.48.04.exe. When the download is finished, click Next at the first Setup screen to begin installation. Confirm the installation path, and then click Next. Enter the two-letter code(s) for the language(s) and flag(s) that you want to install.
Thankfully, at the end of 2015, Soundflower's original author Matt Ingalls picked up the baton. 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.
Audio Setup Software Flowering
Audio Setup Software Flower
Learn more on the Loopback page.