I presume you know about using Tools->Options->Incoming Mail->Content Viewers to set up helper applications that will be used if you choose to Open an attachment in Pegasus, if you set up the appropriate media player for each sound file type it should be possible to play them directly from the attachments page. Always of course noting the security issue and not playing attachments if you do not know where they are from.
I presume you know about using Tools->Options->Incoming Mail->Content Viewers to set up helper applications that will be used if you choose to Open an attachment in Pegasus, if you set up the appropriate media player for each sound file type it should be possible to play them directly from the attachments page.   Always of course noting the security issue and not playing attachments if you do not know where they are from.