Sound Devices MixPre-6 II Audio Recorder / Mixer / USB Audio 4 XLR/TRS Combo input 8-track audio recorder (6+2ch Mix) with USB Audio Interface. The MixPre-3 II, MixPre-6 II, and MixPre-10 II have significantly improved hardware, with 32-bit float recording, patented ultra-wide-dynamic-range A-to-D conversion, internal timecode generation, and recording up to 192 kHz sampling rates in all models. Recorded tracks can be set to auto-copy to a USB drive for easy file transfer, and limiter parameters can now be adjusted.