Why AMR files need conversion
AMR files often come from older phones, voice recorders, and speech-focused apps. Many modern upload forms, media players, and transcription tools handle MP3 more reliably.
Convert AMR to MP3 for compatibility
MP3 is the safer output when you need a recording to play in a browser, attach to email, upload to a portal, or send to someone who may not know what AMR is.
Check speech before deleting the source
AMR recordings can be low bitrate. Listen to the converted MP3 and check names, numbers, quiet speech, and the start and end of the recording before relying on it.