Synthesizers

Hi there! I just picked up a Roland S-1. It's my first piece of gear that doesn't have a big fat 1/4" mono output. All my other stuff simply goes into my audio interface (8i6) in mono, nice and easy. This one however, has a little 1/8" stereo/trs/headphone out. The thing is, I don't mind going into my interface in mono.. I don't really need the S-1's stereo effects (better stereo plugins in Ableton) and moreover I can save a valuable input on my interface.

The S-1, like most recent synths, also has audio+midi over USB, and I'd be happy to use that (frees up an interface input, plus stereo, what's not to like!), BUT apparently you can't do a USB synth and the audio interface at the same time in Ableton. (Supposedly there are ways.. "aggregate devices" should just work on a Mac, but I'm on a PC. I tried with ASIO4ALL but it just crashed my Ableton.)

So my options seem to be:

• ~~USB right to the computer~~ See above, doesn't seem to work for me
• 1/8" trs to dual mono 1/4" breakout cable (this will retain stereo effects from S-1, but take up my last two inputs)
• 1/8" trs cable -> 1/8-1/4 dongle -> single mono input on interface. For some reason this sounds very weak, unless I pull the cable out a tiny bit.
• 1/8" ts cable -> 1/8-1/4 dongle -> single mono input on interface. Now this sounds better.

So, for now I guess I'm doing that final option. It's mono, of course, but I use stereo effects in Ableton to fill it out. What I'm wondering is, is this the right way? What do other people do? I worry that maybe I'm missing something in the audio, like.. if I'm only getting the L channel now, but maybe this synth uses some stereo tricks to fatten the sound (besides the onboard chorus/delay/reverb, which I can switch off if I want), or..? Know what I mean? This is about where my audio knowledge drops off. If anyone here tells me "this synth is not meant to go back to mono and you'll get degradation" then I'll happily get that breakout cable and use my last precious inputs on my 8i6!

This here is a slightly beside the point ramble: wouldn't it be amazing if I could use USB input for all my synths at once? All my Behringers would go direct, heck the RD-8 would be split into a dozen channels, the s-1 would be in stereo, and I could open up my Scarlett to stuff like guitar pedals.... ah that would be nice.

Thanks for reading!