This paper describes music information retrieval (MIR) systems featuring automatic speech recognition. Although various interfaces for MIR have been proposed, speech-recognition interfaces suitable for retrieving musical pieces have not been studied. We propose two different speech-recognition interfaces for MIR, speech completion and speech spotter, and describe two MIR-based hands-free jukebox systems that enable a user to retrieve and play back a musical piece by saying its title or the artist’s name. The first is a music-retrieval system with the speech-completion interface that is suitable for music stores and car-driving situations. When a user can remember only part of the name of a musical piece or an artist and utters only a remembered fragment, the system helps the user recall and enter the name by completing the fragment. The second is a background-music playback system with the speech-spotter interface that can enrich human-human conversation. When a user is talking to ...