Clearer audio makes transcription easier.

Recording quality matters as much as the recognition model.

Keep the microphone close

Distant speech mixes with room echo and background sound. Keep a consistent distance and make a short test before an interview or class. Listen with headphones: words that are hard for you to hear can also confuse recognition.

Reduce noise at its source

Choose a quiet room and keep the microphone away from fans, keyboards and surfaces that transmit knocks. Closing a window or changing position may help more than increasing volume later.

Noise reduction can help, but aggressive settings can remove parts of speech. Keep the original and compare by listening.

Avoid clipping and sudden volume changes

An input level that is too high distorts speech and loses information. Turning down the volume afterward cannot restore clipped parts. Check that both loud and quiet voices are understandable.

One speaker at a time

Overlapping voices can cause missing or mixed words. Leave a brief pause before replying. This version does not automatically identify speakers; add speaker names manually if needed.

Review difficult sections

Select the audio language manually when automatic detection is uncertain. Use timestamps to compare the result with the recording. Mark words as unintelligible if you cannot hear them reliably, rather than assuming the model is correct.

Convert only when necessary

Renaming an extension does not convert a file. If the browser cannot read a recording, use a trusted tool to convert it to WAV or MP3. Repeated lossy conversions may degrade sound. Keep the original when compressing to meet the 100 MB limit.

Check the final text

Pay special attention to numbers, names and negations. A single word can change the meaning. Treat automatic transcription as a draft and review before sharing.