"Well, that will be tough because I am only using the devices on the MB itself. There are no boards plugged into any of the PCI slots."
AH HA! I am sure the mobo Firewire interface is your problem. There have been several glitching related issues that were resolved by *not* using the mobo Firewire interface. It usually shares too many other resources with other mobo embedded devices. I had to go to an external Firewire ExpressCard for my laptop because it would not work well at any sampling rate other than 48K. Now I can run at 96 or 128 K dropout free. Also, only run VAC at 48K (not to be confused with the audio sampling rate). You may need to tune you VAC channel parameters too, particularly the ms/int values. The following KB article can be very helpful in setting up MixW and VAC. HOWTO: How to Setup Virtual Audio Cable (VAC) 4.0x with PowerSDR (http://kb.flex-radio.com/article.aspx?id=10218) One other thing. In MixW, configure the audio processing method to DirectX. -Tim -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Brian Lloyd Sent: Sunday, July 20, 2008 7:59 PM To: Neal Campbell Cc: [email protected] Subject: Re: [Flexradio] Dropouts in VAC stream (was: differences betweenPSK31 demodulators) On Jul 20, 2008, at 3:08 PM, Neal Campbell wrote: > Hi guys! > > Brian, what model of Athlon X2 are you using? How much memory and what > video card (sri if I missed this in a prior note)!. AMD Athlon 64 X2 Dual Core 3800+, 2.01GHz, 1GB RAM. NVIDIA GeForce 6150 on the MB. > The very first thing to do is go to > http://www.tweakhound.com/xp/xptweaks/supertweaks2.htm and follow his > XP tweaking advice. When it gets to the part about turning off Windows > services, I would turn off the services listed in "Level 2" and if you > run into problems, make the services settings look like Level 1. OK, did that. Set up for level-3. Pretty agressive. No change (as I have mentioned). > Anything that requires you open Regedit, ignore. Sensible. > Second thing is to make sure your 1394a adapter isn't sharing an IRQ > (interrupt) with any other bandwidth hogs like the USB controllers, > the lan controllers or the video adapater. To do this go to the System > control panel, select hardware manager and once its open, go to the > view menu item and click on "by connection". This will sort the list > of devices by interrupt. Find your video card and see what else is > sharing it. If one of the bandwidth hogs I mentioned are sharing with > it, try moving it (or some of the other devices) to different slots. > On my machine, it wants to share the IRQ with the Ultra Audio Adapter > so I just disabled it in the device manager. Well, that will be tough because I am only using the devices on the MB itself. There are no boards plugged into any of the PCI slots. > One other thing (while you have the device manager open), make sure > that the machine isn't trying to run TCP over the firewire port (its > default for some reason). Disable the 1394 Network Connection (don't > worry, it doesn't disable your firewire controller). Already done. I always disable that right off the bat on any system I am running. > I have a computer with a X2-4800 and 2GB of memory and have run mixw > with the Flex-recommended values in VAC, at 96 Khz/1024 defined in the > driver spec and 2048 in the DSP buffer size. I would start at that and > if you see gaps in the waterfall (after doing the optimizations in > tweakhound) try 4096 in the DSP buffer. Already up to 2048 in the Flex-5000 control panel. DSP buffer size was already 4096. > The reason this can't be a "recipe" for everyone is that everyone's > set their operating system differently, has their 1394a card sharing > its IRQ with different devices, etc. Windows machines are "the wild > west" when it comes to performance tuning (not even sure its an art). > > > Let me know how this goes! It didn't, at least not for MixW. Now it is time to try other programs to see if that has any effect. -- 73 de Brian, WB6RQN Brian Lloyd - brian HYPHEN wb6rqn AT lloyd DOT com _______________________________________________ FlexRadio Systems Mailing List [email protected] http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archives: http://www.mail-archive.com/flexradio%40flex-radio.biz/ Knowledge Base: http://kb.flex-radio.com/ Homepage: http://www.flex-radio.com/ _______________________________________________ FlexRadio Systems Mailing List [email protected] http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archives: http://www.mail-archive.com/flexradio%40flex-radio.biz/ Knowledge Base: http://kb.flex-radio.com/ Homepage: http://www.flex-radio.com/
