This BBR model can also interface directly with any of the high quality A-D converters that incorporate Lightpipe outputs. Three 8-channel Lightpipe inputs can be connected from the mixer and three Lightpipe outputs can return the signals back to the mixer. All other BlackBox Recorder features remain unchanged and the full analogue i/o capability of the standard BBR1 is still available for situations where the Lightpipe interface is not suitable. Note: Due to limitations in the Lightpipe format, use of this option restricts 24-track recording to single speed sample rates (44.1kHz and 48kHz). At double sample rates the unit employs the SMUX2 protocol reducing the i/o count to 12 channels. However, the full 24/24/96kHz facility is still available in the analogue domain. Lightpipe i/o via 3 x TOSLINK inputs and 3 x TOSLINK outputs (24 channels @ 48k, 12 channels @ 96k). Word clock input on BNC. Unbalanced analogue as BBR1U (cable looms not supplied)