[alsa-devel] opening rawmidi on user ports

Hi, I use btmidi-server from the bluez stack, which creates user ports to send and receive midi via bluetooth. I can't manager which parameter string i must provide to snd_rawmidi_open function, can you help ?

(of course the user ports don't appear in amidi -l) I only have a client and port ids (128:0) when using aconnect -l

Thanks