One of combined USB hubs and audio interfaces is a M-Audio M-Track Hub – device in small fully metal body. It has power adapter input and can supply energy to 3 USB devices simultaneously and play sound at the same time, this allows to connect to computer a couple of USB instruments and listen for the sound from DAW with 24 bits per sample precision ( manufacturer does not tell with which sampling rate ). On top it has large metal knod for main inputs volume control; on frontal panel there are TRS 1/4″ jack headphones output, their volume control and 3 USB ports. On back panel there are : Kensington Lock slot, power adapter input, USB input for connection to computer and 2 balanced main analogue TRS 1/4″ jack outputs ( left and right ).
Package contains : combined USB audio interface and hub M-Audio M-Track Hub, USB cable, warranty card and user’s guide. From one side : this is a convenient compact device, allowing to power 3 USB devices and connect them to computer and listen to the sound simultaneously; from the other : taking into account M-Audio‘s pricing policy, it is better to buy entry-level studio audio interface of Steinberg, Behringer, Focusrite, Roland, ESI or other manufacturers production and externally powered USB hub and receive much bigger functionality for the same or even smaller sum.