Transcribing the content of a recorded audiovisual file is what audio transcription is all about, as the name implies. I believe it is vital to emphasize "audiovisual" rather than "audio" in this context, because you may be given either an audio or a video file and asked to transcribe the contents of that recording while retaining a zero percent distortion.
Our services on audiovisual transcription are only for English language audiovisual files.
Note: Audio quality must be audible enough to aid us in achieving better result for you (our client).