Date: Mon, 25 Aug 97 16:13 PDT From: Denis DeLaRoca <CSP1DWD@MVS.OAC.UCLA.EDU> To: Amancio Hasty <hasty@RAH.STAR-GATE.COM> Cc: multimedia@FREEBSD.ORG Subject: guspnp17 and vat/rat Message-ID: <199708252312.QAA19291@hub.freebsd.org>
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Amancio, I am testing guspnp17 with both rat (v3.0.23) and vat (v4.0b2) with today's MBONE broadcast of the Stanford channel. With vat I am using your version of the audio-voxware.cc. Vat seems to get periodically into conditions where the audio is dis- torted: what sounds like rumbling noise plus echoing or ghosting. Rat in comparison yields consistently good audio with no audible distortion. What is going on? To begin with, my loss on received packets is not excessive, typically 1%, at times and very briefly 5%. Stanford's transmission doesn't use redundancy so rat is running in vat-mode so to speak. I have a suspicion that the observed conditions have to do with how vat is scheduling audio packets via audio-voxware.cc. Since we don't have the source to rat we can't see what they are doing right... any guesses? -- Denis
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