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BlackHole: macOS Audio Loopback Driver

github.com Software & code Software projects Software engineering Candidate
Screenshot of github.com captured 2026-07-20
Page preview · captured 2026-07-20

Resurfaced independently across 3 calendar years, with breakout response in 2 of them.

submissions
3
submitters
3
observed span
2019–2024
peak thread · 125 comments
339 pts
latest 20+ return · 2024-05-06
339 pts

Submission timeline

2007–2026

One slot for every year since HN launched. Height is that year's peak points; orange marks a 100+ point or 50+ comment breakout. Select a bar to open its strongest thread.

First comments on top threads

HN comment order

Something like this should be default in MacOS. I use blackhole daily in my audio production and sound design practices. If you use a modern audio interface you might have a loopback available there.

12bits·339-point thread·

Last year I tried this driver (and Soundflower, and a bunch of other similar stuff) because I needed to transmit my system audio + microphone via Skype (online music classes thanks to COVID). I couldn't get it to work properly for my setup, where I wanted to listen just the system audio through my headphones but route system + microphone to Skype. I ended up buying Loopback [1], it's not cheap but it worked pretty well, it's pretty easy to…

I haven’t tried this yet, but I’m excited to see it! I used to use SoundFlower to route audio between applications, but it was not working when I last tried it a year or so ago. This looks like A 1:1 replacement.

The first top-level comment from each of the four biggest threads, in HN’s own order. Excerpts are shortened; open a comment for full context.

Breakout years
2

100+ points or 50+ comments

Total points
493

reference only — not used in Hall rules or ranking

Total comments
191

reference only — not used in Hall rules or ranking

Every submission

DateTitle as submittedByPointsComments
2019-10-29macOS Audio Pass-Through Virtual Driverdivenorth21
2021-12-20BlackHole Audio DriverFirst breakoutcolinprince15265
2024-05-06BlackHole: macOS Audio Loopback DriverBest thread · Latest 20+ point returnckcheng339125