Thanks for getting that into the update, this makes the Sylphyo significantly more useful for me.

Thanks that's great! It seems to work fine using a 3.5mm stereo - 2x 6.5mm mono cable with just one of the mono end plugged in. On a Link I'd be using the line out so wouldn't have these concerns - I suspect I will get a Link at some point, but only if the opportunity for live performance arises I think. Or I start wanting those MIDI ports...

I haven't been able to find anything in the Slyphyo's technical information about what the headphone jack actually is - specifically is it stereo? Does the synth output stereo data or can I just take one channel of it and feed it to a mono input?

I'm wanting to use the Slyphyo without a Link initially, so I would like to have a better idea of the nature of the sound output. If I get really serious I will of course get a Link and take advantage of its line output.