1Microphones

2Sync test recommended once

Records both mics for a short time and measures how far their clocks drift apart. You only need to do this once per setup.

Both mics need to hear the same sound, so use speakers, not headphones. If the clicks are too quiet, choose “I'll talk or clap” and talk midway between the mics.

3Record

Activity

• Warnings about dropped audio, silence or clipping will appear here.

4Your files

Your files are ready. Go to Downloads ↓

5Podcast polish optional

One click turns the synced recordings into podcast-ready audio. Untick anything you don't want. The unpolished files stay available in Downloads either way.

1. Remove rumble

   Filters out deep sounds below 80 Hz that voices don't need: traffic, air-conditioning hum, desk and mic-stand bumps.

2. Remove clicks and pops

   Finds very short clicks (mouth noises, cable crackle, digital ticks) and smooths over them. Anything longer than 1.5 ms, like a “p” or “t”, is left alone.

3. Reduce background noise

   Learns what the room sounds like from the quietest moments (hiss, fans, fridge hum), then turns that sound down by up to 12 dB while keeping the voices.

4. Reduce crosstalk

   Each mic also picks up the other person slightly late, which sounds echoey. Each mic is turned down by 10 dB while its own person isn't talking, and opens again just before they speak.

5. Soften harsh “s” sounds

   Turns down piercing high frequencies (above 6 kHz) only at the moments they spike, known as de-essing.

6. Even out the volume

   A slow leveller (up to ±6 dB) brings a voice back up when someone leans away from the mic, and a gentle 3:1 compressor keeps loud moments in check.

7. Trim silence at the start and end

   Cuts dead air before the first word and after the last, leaving a short lead-in, and fades in and out.

8. Shorten long pauses

   Any gap over 1.5 s where nobody speaks is shortened to 0.8 s. Both mics are cut at exactly the same points, so they stay in sync.

9. Match the voices and set podcast loudness

   Brings both voices to the same loudness and sets every file to −16 LUFS (Apple Podcasts / Spotify standard) −19 LUFS (quieter, more headroom) −14 LUFS (louder, YouTube / streaming) . A true-peak limiter keeps peaks at or below −1 dBTP, so it won't distort on any player. Always on.

Recordings kept in this browser

Recordings are saved here as you record, so they survive a crash or a closed tab. Delete them once you've saved the files.

Downloads

These buttons switch on once a recording has been made into files.

Each mic on its own

Both mics in one file

Stereo puts Mic A on the left and Mic B on the right, so you can still adjust each one in an editor. Mono mix blends both into one channel, turned down slightly only if the two together would clip.

Extras