I want to play some of the SFP-Synth like I can do that in the Arturia ARP2600 or the Moog Modular with their integrated sequenzers. A tool almost like an arpeggiator, but I want the set tune and length of a played tone by myself.
I hope you know what i mean?!

Is there a free or low-priced devices available?
I have searched the in devices forum, but didn't find enything
Regards
J-Lee