Audio file created in QUALCOMM's PureVoice format; used for both human voice recordings and mobile phone ringtones; designed for vocal frequencies and uses variable encoding rates to take advantage of natural pauses in human speech; sometimes sent as an email attachment, which can be played using QUALCOMM's PureVoice Player-Recorder, a plugin for email applications. You can create QCP files as well as convert them to PCM audio using QUALCOMM's PureVoice Converter, a Mac command line utility. The program QCP Converter can also convert many popular audio formats to QCP files. QUALCOMM also provides the PureVoice SDK which can be used to embed PureVoice functionality into applications.