Hi Colin, Now Csound has an entry to Pulseaudio to use it as realtime renderer, so i'm trying to use it on my Solaris station. The problem is that i get really a communication between both softs, but the flux stops after some lines. Other hand my paplay works greatly. Using PA as rt renderer, in my terminal i have that : I: created 0 "Native client (UNIX socket client)" I: client 0 changed name from "Native client (UNIX socket client)" to "csound" I: created 0 "csound-out" on solaris_output with sample spec float32le 1ch 44100Hz I: Creating new entry for <pulsecore/protocol-native.c$csound> First looks this good ? And after that, what could i try in my etc/pulse config ? Cheers, Sergio