Ever miss ASIO Direct Monitoring? With Global OSC in TotalMix FX 2.1 Alpha 4, the same idea is finally back — and goes a lot further. I willed a free REAPER extension called TotalReaper into existence that does exactly this:

Once you flip it on, every REAPER track that has input monitoring active drives the matching TotalMix input fader live. Move your REAPER fader, the TotalMix routing follows. Pan, width, even stereo-pan — all mirrored. Headphone mixes work the same way: any track send that ends up routed to a hardware output (your Phones 1, Phones 2, etc.) opens its own routing in the TotalMix matrix, with the right level applied. So your cue mix in REAPER is the cue mix on the headphones, no manual TotalMix fiddling.

Five extra REAPER actions handle the per-channel hardware controls: gain ±1 dB, 48V phantom, pad, phase invert. They work on however many tracks you have selected at once. The pad action briefly mutes the channel around the switch so the relay click is hidden. Output volumes in TotalMix are deliberately *not* touched.

While the mirror is on, REAPER's own software monitor for those tracks is silenced automatically. One toggle and you're back to whatever you had before.

Tested: UFX+ on macOS arm64 with TotalMix FX 2.1 Alpha 4. Should work on Windows and other RME devices that support Global OSC. Free, MIT-licensed.

Download: https://github.com/acklin83/totalreaper/releases

Install:

- macOS (Apple Silicon): drop `reaper_totalreaper-arm64.dylib` into `~/Library/Application Support/REAPER/UserPlugins/`. Restart REAPER.
- Windows: drop `reaper_totalreaper.dll` into `%APPDATA%\REAPER\UserPlugins\`. Restart REAPER.

TotalMix setup: Settings → OSC → Compatibility Mode → **Global OSC**. In the OSC details, set **Receive Port to 7001** and the **Send target to 127.0.0.1:7002**. TotalReaper uses these ports (hardcoded for now).

In REAPER: Action List, search "TotalReaper", run "Toggle Routing Mirror". That's it. Bind the gain/48V/pad/phase actions to keyboard shortcuts if you want quick access.

Source: https://github.com/acklin83/totalreaper

Big thanks to RME for shipping Global OSC!

Best,
Frank