The engines you enumerated doesn’t have presets, my friend
Raffo
Vex
Synthv1
Wolpertinger
etc.
There is a bunch of synth engines for which we don’t have presets.
OK! I’ve a nice collection of presets for synthV1, but we have to convert from native format to LV2 before we can use it with zynthian. I hope to do it very soon …
Pianoteq 6.5 stage stopped working after yesterdays (?) update. Tried software update today, but still not working. The problem is that when I chose “Add new layer” -> “pianoteq 6.5 stage”, nothing happens. Just a short wiggle of the zynthian logo, but menu stays the same.