Re-Q: A realtime, fully customisable audio dsp app

Re-Q is a macOS menu bar audio router and pipeline. Send your system audio to multiple outputs at once, with independent EQ, resampling, and effects on each. $35, one-time. • Route to multiple outputs simultaneously • Fully customisable effects chain per device: parametric EQ, compressor, noise gate, de-esser, reverb, and more • Up to 64-channel support with per-device channel remapping • Built-in resampling • Real-time processing, low CPU overhead

I built Re-Q because i wanted a way to edit what was playing on any app even if it didn’t natively support it. I also found that macOS multi output devices were unreliable and that there had to be a better way to do it. Under the hood it’s built entirely in Rust making direct calls to the coreaudio HAL, allocating only the memory it needs per device at the beginning and precomputing filters to keep the pipeline fast and efficient even with multiple outputs running simultaneously. It’s a $35 one time purchase, no subscription. Note: There is a known cosmetic error when applying filters to devices that aren’t selected as an active output. It gives an error saying filter failed. Again this is purely cosmetic, filters still get saved and applied like normal. I’m working on a fix for a future update. I built this solo, so I would really appreciate any feedback on what’s missing or any improvements that could be made. I’m happy to answer any further questions anyone has.

how does this hold up latency-wise when routing to bluetooth headphones alongside a wired output at the same time?

@muammer1177418 It attempts to keep them in sync but because a lot of Bluetooth devices report rounded or estimated latency values to the OS, they can drift in and out of sync at times.

Finally something that lets me send audio to my speakers and headphones at once without the usual routing headaches. The per-device EQ chain is surprisingly deep for a menu bar app.

how does this hold up latency-wise when routing to bluetooth headphones alongside a wired output at the same time?

@muammer1177418 It attempts to keep them in sync but because a lot of Bluetooth devices report rounded or estimated latency values to the OS, they can drift in and out of sync at times.

Finally something that lets me send audio to my speakers and headphones at once without the usual routing headaches. The per-device EQ chain is surprisingly deep for a menu bar app.