Tony Austin wrote: A better equivalent would be the "Through" port(s) created with the snd-seq-dummy module. In Windows, MIDI devices drivers have ports that programs can connect to, while programs cannot create ports. Therefore, if you want to connect two programs, you have to use a tool like Midi Yoke that creates a virtual device. In Linux, both drivers and programs can create ports, and synthesizers typically do create such ports so that you can connect directly to them. Wine doesn't do this for Windows applications, so you have to use a "Through" port, which behaves like a MIDI through port in Midi Yoke. Tell BiaB to play to the Through port, and tell Reaper to record from the Through port. Regards, Clemens