Podcast and Spoken-Word Audio

How to fix mic bleed between two podcast mics in REAPER

By StudioRescue Editorial

Published September 27, 2026

Two people, two mics, one room. You open the session expecting two clean tracks and instead each track has both voices on it, one loud and close and one faint and roomy. Then you play both tracks together and the whole thing sounds slightly hollow or phasey, worse than either track on its own.

That is mic bleed, also called spill, leakage or crosstalk, and it is not a fault in your gear. Every microphone hears everything in the room. A directional mic hears the person in front of it loudest, but it still hears the person beside it. Here is how to work out how much of a problem you actually have and what to do about it in REAPER with stock tools.

Why both tracks together sound worse than one

The faint copy is the annoying part, but it is not the damaging part. The damage is that your co-host’s voice now exists twice in your session: once close and loud on their mic, and once distant and slightly later on yours. Sound takes about a millisecond to travel a foot, so the two copies are out of step with each other.

When you play them together, some frequencies add and some subtract. The result is the thin, hollow, slightly tunnelled sound people describe as phasey. It is the same mechanism that makes two mics on one voice sound hollow, which is covered in detail in why two vocal tracks sound hollow when you combine them.

Test how bad it is before you fix anything

Fix 1: edit each track down to its own speaker

This is the fix that always works, and it is the one professional dialogue editors use. The logic is simple: at any moment, one of your two tracks has a clean close version of whoever is speaking. You only need the other track to be silent at that moment.

1. Turn automatic crossfades on before you cut anything, so every edit gets a short fade instead of a click.
2. Leave ripple editing off. The two tracks have to stay locked to each other in time. Rippling one and not the other will pull the conversation apart.
3. Split each track at the start and end of each of that person’s speaking turns, then delete or mute the sections in between.
4. Do not cut tight to the words. Leave roughly a quarter of a second of that person’s own room tone before and after each turn. Cutting to absolute silence sounds more unnatural than the bleed did.

REAPER has a bulk version of this. The user guide documents Dynamic Splitting under the Item menu, described as removing silent passages: it splits items using a gate threshold so the quiet sections can be removed in one pass. Use it for the rough pass on a long episode, then listen through and repair the seams by hand, because it will inevitably clip the start of a few quiet words. The step-by-step mechanics of splitting, crossfading and closing gaps are in how to edit out filler words and breaths in REAPER.

Fix 2: ReaGate, and the settings to start from

A gate does the same job automatically and in real time. ReaGate ships with REAPER. Cockos describes it as “a noise gate whose most common use is to filter out sound when the volume falls below a specified threshold level”, which is exactly the shape of this problem: your own voice is loud on your track, the bleed is quiet.

Put one instance on each speaker’s track and set the threshold so it sits above the loudest bleed but below that person’s quietest real word. These are starting points, not correct values. Every room, mic distance and speaking style moves them.

ReaGate also has a detector input that can be driven by “the signal from another source (Auxiliary Input)” rather than the track’s own audio. That opens the door to keying one track’s gate from the other, but it is fiddly to set up and easy to make worse. Get the straightforward version working first.

What to do where both people talk at once

Nothing above helps here, because both tracks legitimately contain speech at the same time. Your options are to leave it, which is normal in conversation and usually fine, or to choose one track for that moment and fade the other under it. Overlapping speech is the hard limit of every bleed fix, including the paid machine-learning tools that advertise bleed removal.

Stop it at the source next time

Twenty minutes of setup saves hours of editing. None of this needs new gear.

• Use the 3-to-1 rule. Shure’s educational publications state it plainly: “the distance between microphones should be at least three times the distance from each microphone to its intended sound source”, which “will help eliminate phase cancellation”. If you each sit six inches from your mic, keep the two mics at least eighteen inches apart.
• Get closer to your own mic. Closer means more of your voice for the same gain, which means less of everything else, including your co-host.
• Point the dead side at the other person. A cardioid mic is “most sensitive to sound arriving from directly in front” with “maximum rejection at 180 degrees off-axis”. Angle the mics so each one’s back is turned toward the other speaker rather than having them face each other across a table. Check your mic’s own polar-pattern chart first: that 180 degree figure is for a cardioid, and supercardioid or hypercardioid mics reject most at an angle off the rear rather than directly behind, so the best aim is a little to one side.
• Turn the gain down. High preamp gain to compensate for sitting far away amplifies the bleed just as much as the voice.
• Record each person to their own track. Bleed is only fixable at all because the tracks are separate. If you are still setting this up, see how to record two people in one REAPER session.

What this will not do

• It will not separate two voices that overlap. Editing and gating both work by silencing a whole track for a stretch of time, so they cannot pull two simultaneous speakers apart.
• It will not undo the cancellation already printed into a section where you keep both tracks playing together.
• It will not make a shared room sound like two isolated booths. Each track still carries that room’s tone while its own speaker is talking.
• Flipping polarity on one track will not cancel the bleed. The bleed arrives at a different delay for every sound, so there is no single flip that lines it up.

If it still sounds off

1. Words are getting clipped. The gate threshold is too high, or the hold is too short. Raise hold first, then lower the threshold.
2. The track stutters during speech. That is gate chatter. Add hysteresis and lengthen the release.
3. Each track sounds fine alone but hollow together. You have not silenced enough of the non-speaking track. Go back to the edit, not the gate.
4. The two voices are now at very different levels. That is a separate job, and the method is in how to match podcast host and guest loudness in REAPER.
5. The gaps sound dead. You cut to silence. Put a little of that speaker’s own room tone back under the gaps.