Fixing messy audio and accents

This is Talk Type, from the team at Pepys, where we turn talk into text.

Here's a thing that surprises people. Most of your transcription accuracy is decided before you ever hit transcribe. By the time you're uploading the file, the ceiling is mostly set. So if you care about the result, the moment that matters most is when you press record.

Start with the mic. Distance is the single biggest factor. A microphone close to the person talking hears clean speech. A phone across the table hears the room. If you can, get the mic near the mouth, a lapel mic, a headset, or just a phone held closer. That one change beats any setting in any app.

Then the room. Hard, echoey rooms bounce sound around and smear the words. Soft rooms, with carpet, curtains, furniture, soak it up. And background noise is a straight tax on accuracy. A fan, an air conditioner, a café, traffic through a window. The model has to fight through all of it. Quiet room, closed window, and you've already won half the battle.

Accents are their own thing, and it's worth being straight about it. Modern models handle a wide range of accents far better than they used to, but strong or less common accents are still harder, and they get much harder when the audio is also noisy. Clean audio helps an accented voice more than almost anything else. So the fix is the same. Record clean.

Crosstalk, people talking over each other, is the one that wrecks both accuracy and speaker labels at once. The only real fix is upstream. One person at a time. It feels unnatural in a lively conversation, but it's the difference between a clean transcript and a mess.

Now, what if the recording already exists and it's rough? You can't re-record the past. So the move is to let the model take its best first pass, then read the transcript against the audio and fix the spots it got wrong, the names, the terms, the muffled lines. That's still far faster than typing it yourself. But if there's a next time, remember. The best transcription tool in the world can't hear what the microphone didn't.

That's this episode of Talk Type. The full write up, with the links and sources, is in the show notes. Pepys transcribes any file or link, any length, pay once, and we never train on your audio. Your first sixty minutes are free at pepys dot co. Thanks for listening, and we'll see you next time.