GLD. What format is used to record USB audio? 16 July 2021 14:21 GLD recordings are 16-bit 44.1KHz, WAV files. Related articles GLD. Play and Record from USB simultaneously? dLive. USB support dLive. Understanding dLive USB Recording and Playback GLD. What codecs are supported for USB audio playback? GLD. Maximum recording time on a USB memory stick?