From owner-freebsd-multimedia Mon Dec 9 19:12:52 1996 Return-Path: Received: (from root@localhost) by freefall.freebsd.org (8.8.4/8.8.4) id TAA00661 for multimedia-outgoing; Mon, 9 Dec 1996 19:12:52 -0800 (PST) Received: from rah.star-gate.com ([204.188.121.18]) by freefall.freebsd.org (8.8.4/8.8.4) with ESMTP id TAA00652 for ; Mon, 9 Dec 1996 19:12:49 -0800 (PST) Received: from rah.star-gate.com (localhost.star-gate.com [127.0.0.1]) by rah.star-gate.com (8.7.6/8.7.3) with ESMTP id TAA00526; Mon, 9 Dec 1996 19:11:51 -0800 (PST) Message-Id: <199612100311.TAA00526@rah.star-gate.com> X-Mailer: exmh version 1.6.9 8/22/96 To: dwhite@resnet.uoregon.edu cc: multimedia@freebsd.org Subject: Re: GUS & Mbone: more updates In-reply-to: Your message of "Mon, 09 Dec 1996 16:41:37 PST." Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Date: Mon, 09 Dec 1996 19:11:51 -0800 From: Amancio Hasty Sender: owner-multimedia@freebsd.org X-Loop: FreeBSD.org Precedence: bulk >From The Desk Of Doug White : > Hello again... > > After I replaced my VAT with a full duplex version from rah, the looping > and popping and whatnot has stopped. I've been watching the IETF stuff > for several hours now and it works like a charm. The only annoying thing > is that the audio cuts out every so often, but I think this is from > problems at the gateway or transmitter at ietf2.bbnplanet.com so I'm not > worried about it. Play a little with vat if you click mouse on the transmitting source you will be able to start an rtp stats window which will let you know if vat is dropping packets or not. > I've noticed that the volume bars lag quite a bit behind the audio, such > that I've just turned them off. Any ideas behind that? > > The thing that does worry me is the excessive debugging output from the > kernel. I get lots of these: > > isa_dmastart: channel 1 busy > isa_dmastart: channel 3 busy Just comment out in /sys/i386/isa/isa.c the diagnostic message. > I know this is a silly stupid thing, but I can't remeber where this is at. > Someone have the patch? (BTW: these pop up whenever I jump between vats > (I'm watching both IETF channels currently), and just every so often. Any > guesses why both the play and record DMAs bounce? > > Secondly, when I was using the half-duplex vat, I got a lot of these > lines: > > Dec 8 23:55:26 gdi /kernel: write select 1 > Dec 8 23:55:27 gdi last message repeated 672 times > Dec 8 23:55:27 gdi /kernel: isa_dmastart: channel 3 busy > Dec 8 23:55:29 gdi /kernel: write select 0 > Dec 8 23:55:29 gdi last message repeated 4 times > Dec 8 23:55:29 gdi /kernel: write select 1 > Dec 8 23:55:31 gdi /kernel: write select 0 > Dec 8 23:55:31 gdi last message repeated 4 times Thats my fault just get rid of my debuggin message . It is in audio.c: audio.c: printf("write select %d\n", foo); > Here is the interesting part. The audio was clear until the 'channel 3 > busy' message came up. Then I got the write select 0's interspersing > thoughout the write select 1 messages. (I got these write select's > regularly.) At the same time, the looping, popping, and general poor > audio started up. > > I'm guessing that these status messages may be related to the poor audio > output from the half duplex vat (which must be used on SoundBlasters). > Note that i got the exact same poor output until I bumped my vat to the > full duplex version. I still have the half-duplex, so I'd be glad to do > some testing. I'll only have my net until midday tomorrow or so, so get > back to me soon if you want to deal with this before January. > > I'm not experienced enough programming to track down this stuff. I'm > hoping someone will pick this up (bill?) and work with this. I'd really > like to see the half-duplex vat's audio quality improve, as many of us are > stuck with them and don't want to spend the $xxx on a gus when (IMHO) the > awe32 has nicer MIDI audio :), and paid $200-300 for the AWE originally. > > Finally: all is well at gdi. Now to bludgeon the qcam into shape again > and play with increasing the fps... > Well , the meters they chew up cpu time so if you don't have a fast computer I don't recommend that using them. My old system was a P100 and vat's meters did have much of a problem by way of coming up with the sound . Have fun, Amancio