I need a USB audio interface with more than 2 inputs to connect my Pro-800 and LM Drum simultaneously. A budget-friendly option that matches my other gear would be great.
Until now I have been happily trucking along with this - [https://www.amazon.co.uk/M-Audio-M-Track-Duo-Interface-Podcasting/dp/B08Q1V77NR](https://www.amazon.co.uk/M-Audio-M-Track-Duo-Interface-Podcasting/dp/B08Q1V77NR) The Left and Middle ports connect (either) to my Behringer Pro-800 (yes I know it is Mono, so only needs one - but bear with me...) (or) to my new Behringer LM Drum machine The headphones port on the far right is connected to my Fender Mustang GT-40 Guitar amp All was going fine with this set up - until I got the LM Drum I can only get Sound from EITHER the Pro-800 synth - OR the LM Drum \- UNLESS I only have ONE 1/4" TRS Lead connecting the LM Drum to the USB Audio interface... ...which is not ideal - as then I only get Sound from its Left channel or its Right channel TLDR - with my set-up should I buy a 4-input USB Audio interface / and 2 x more 1/4 TRS Leads ? If yes - any recommendations for which USB Audio interface? I don't want to spend much on it - and I want it to be Black (not Red like the Focusrite) - to match all my other Computer stuff and Musical instruments Many thanks