The moment you add a co-host or interview a guest, audio gets complicated. A guest needs to hear the game, the host, and themselves clearly, but not a delayed echo of their own voice. A monitor mix, sometimes called a foldback or a mix-minus, is the technique that gives everyone clean audio to listen to. It sounds like broadcast wizardry, but the core idea is simple: send each person everything except their own delayed voice.
The echo problem, explained
When a remote guest talks, their voice travels to you, into your stream, and can loop back to them a half-second later as an echo. That delayed copy of their own voice is maddening and makes conversation impossible. The fix is a mix-minus: the guest hears the full show minus their own microphone, so there is nothing to echo.
Local vs. remote guests
A guest sitting next to you is easy; they hear the room and the game through their own headphones off a shared output. A remote guest joining over a call is where mix-minus really matters, because latency turns any return of their voice into a distracting echo.
What each person should hear
| Listener | Should hear | Should NOT hear |
|---|---|---|
| Host | Guest, game, self (optional low) | Nothing critical missing |
| Remote guest | Host, game, music | Their own delayed mic |
| Viewers | Everyone and everything | Private side-chat |
Building a mix-minus
With an audio mixer or a virtual audio tool, create a separate output bus for the guest. Route the host mic, game, and music to that bus, but do not route the guest’s own incoming audio back into it. Send that bus to the guest’s call. Now the guest hears the whole show except themselves, which eliminates the echo while keeping them fully in the conversation.
Hardware that makes it easier
Some streaming mixers include dedicated mix-minus or “clean feed” outputs designed exactly for this, so you do not have to build the routing by hand. If you use software like a virtual audio mixer, you replicate the same idea with buses. Either path works; hardware just labels the buttons for you.
Set headphone levels for comfort
Give each person independent volume over what they hear, so a guest can turn up the host without blasting the game. Aim for a balanced monitor level where voices sit clearly above background game audio, and check that no one is straining to hear or wincing at loud effects. A quick sound check before recording saves a rough first ten minutes.
Frequently asked questions
Why does my remote guest hear an echo of themselves?
Because their own microphone is being sent back to them with a delay. Build a mix-minus: route everything to the guest’s output except their incoming audio. Once their voice is removed from what returns to them, the echo disappears.
Do I need an expensive mixer for a monitor mix?
No. A hardware mixer with a clean-feed output makes it convenient, but you can build the exact same mix-minus with free virtual audio software and separate buses. The technique matters more than the price of the gear.
Preparing guests before you go live
Even a perfect mix-minus falls apart if your guest joins on laptop speakers. Half of clean multi-person audio is coaching the guest before the stream. Ask them to wear wired headphones, which prevents their speakers from feeding your call back into an echo loop and gives you the isolation a mix-minus assumes. A quick pre-show check, have them talk while you confirm they hear you clearly and do not hear themselves delayed, catches problems before your audience does. It also helps to agree on a simple signal for audio trouble, so a guest can flag that they cannot hear you without talking over the show. Send a short setup note in advance covering headphones, a quiet room, and a stable connection. Guests are rarely audio engineers, and a two-minute briefing turns a potentially rough call into a smooth one. Your routing handles the echo; your preparation handles everything upstream of it.
Bottom line
A monitor mix keeps guests in the conversation without maddening echo. For remote guests, build a mix-minus that sends them the host, game, and music but never their own returning microphone. Give each listener independent volume, sound-check before you roll, and multi-person streams sound clean and professional instead of a garbled mess.
