Hi. I'm writing to the list as opposed to the individual app owners since I can't really tell where the bug is. I have a sequence in which I want to use zynaddsubfx as the bass and another instance of zynaddsubfx for synth strings. The problem that I see is when I add the base instance to the bass track, muse then gray's out both instances (which have the same name, so I assume that muse is going through the list graying out any instance with the given name). I do notice in qjackctl's connection screen that the two instances of zynaddsubfx midi out have the same name although obviously they are on different ports. The zynaddsubfx audio instances have different names. This could be a bug - I'm not familiar enough with the jack naming conventions to definitively state this though. However, when I do the same in rosegarden4, it works fine. Rosegarden4 seems to key its list of softsynths with the name and port number. Thus, in conclusion it seems that zynaddsubfx might be at fault in that multiple instances advertise themselves with the same midi out name. I tested several other softsynths. It seems that ams, spiral modular synth and hydrogen also share this characteristic. AmSynth appends a "serial number" to new instances in the midi client list and I tested that muse does indeed work fine with muliple instances of AmSynth. Muse might be at fault because it uses only the midi out name instead of looking also at the port number. Given the number of softsynths that follow the convention of identifying themselves by non-unique names, I think muse should probably add the port number to the identifier to tell instances of the same softsynth apart.