Here are some features that I think would greatly enhance the Volca Keys.-A true line-out (you will need to purchase a 3.5mm trs to 1/4" ts line to make the keys usable as an instrument)-A line-in, allowing you to process other input through the filter-A USB midi in (not just DIN.)

So far, this synth is fun and easy to use, though I am sure I would struggle to create the kinds of very crisp, clear lines necessary for recording, but this was known, given the tiny, flat style "keyboard" it posesses

Amazing product line

You can easily use the headphone jack as a “line out” into a mixer or powered monitor, and it works great