Recording high-quality video on your smartphone is pretty easy, but getting decent sound at the same time is a little more complicated, especially if you want to record multiple musical instruments simultaneously.
Fortunately, Roland is here to help with the GO:MIXER, a compact audio mixer that's designed specifically for smartphone video production. Compatible with iOS and Android devices and powered by your phone, this offers inputs for a vocal mic, guitar/bass and stereo keyboard, plus a couple of line-level inputs that can be used to hook up other gear (a drum machine, for example).
The levels of the inputs can be mixed in real-time using the front-panel knobs, and there's a stereo output jack for monitoring via headphones or speakers. It's also worth noting that one of the line-level inputs features a 'Center Cancel' function, which is designed to reduce the volume of a vocal in an existing song for karaoke purposes.
Find out more on the Roland website. The GO:MIXER is set to cost $99.