From NCH Software:
Express Scribe is professional audio player software for PC designed to assist the transcription of audio recordings. Audio recording can be loaded automatically from email, LAN, FTP, local hard drive, and Express Delegate. A typist can install Express Scribe on their computer and control audio playback with a foot pedal (keeping your hands free for typing), or keyboard shortcuts with Scribe running in the background while transcribing into a word-processor or other program. The free version of Express Scribe supports most common audio formats including WAV, MP3, WMA, AIF, and DCT and does not expire. You will need the professional version for playing proprietary formats including DSS, DS2, MVF and video file transcription.