Best Audio Formats for Transcription
File format matters less than clear speech, but it still affects quality, upload size and compatibility. Use the original file whenever possible.
WAV: maximum compatibility and detail
WAV is commonly uncompressed. It can preserve speech detail well, but files are large. It is a strong choice for studio, research and archival recordings.
FLAC: lossless with smaller files
FLAC preserves audio data without lossy compression and often uses less space than WAV. It is useful for high-quality archives when your recorder supports it.
MP3: small and widely supported
MP3 is easy to share and works well when the bitrate is reasonable. Repeated re-encoding or aggressive compression can blur consonants and reduce accuracy.
M4A and WebM: common modern sources
Phones often create M4A files, while browser and meeting recordings frequently use WebM. Uploading the original is usually better than converting it first.