OK folks. You need to try this simple configuration change before doing anything radical.
I have updated the VAC install article on the KB to reflect what I am going to summarize here. http://kb.flex-radio.com/article.aspx?id=10218 I have found through extensive testing that there is a preferred method for configuring VAC 4.07. This is not a perfect solution and the VAC audio channel in PowerSDR still needs some work to minimize the ~200 ms of delay through the channel. These optimizations will come in due time. In previous VAC set ups, it was recommended that the VAC sampling rate in PowerSDR and the sound card be exactly the same. I have found that this is not the case. I have been testing with VAC 4.07, MixW 2.18 and the FLEX-5000 extensively over the past few weeks and this configuration should be applicable to the SDR-1000 too. (I would have tested it, but my SDR1K is in RX only mode). What I have done is create two VAC channels to be cable format limited and the Sampling Rate (SR) range to be between 11025 and 96000 Hz. In PowerSDR setup on the VAC audio setup, I set the sampling rate to 48000 Hz. MixW is configured for 12000 Hz. The audio channel "down converted" to the appropriate sampling rate and bit depth for the soundcard. Now, when do this, you must start PowerSDR in DigiX mode with VAC enabled BEFORE starting the soundcard program because PowerSDR predefines the VAC channels when it is enabled. You can see this from the VAC Control Panel. I have not tried this with other programs, so you mileage may vary. -Tim -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Jon Maguire Sent: Friday, July 27, 2007 3:07 PM To: Dudley Hurry Cc: flexradio@flex-radio.biz Subject: Re: [Flexradio] sdr 1.91 beta I'm using the Firebox without the beta firmware. I have the sampling rate in the VAC 4.07 console set to 11025-48000, and the PowerSDR VAC sampling rate set at 12000. Will I be able to run that at 48K without upgrading the firmware? Thanks for any suggestions and help. 73... Jon W1MNK Dudley Hurry wrote: > Art, > > Another thing that might help which solved my dropouts is to bump the > audio sample rate (shows up in either "DIGL" or "DIGU" modes to 48000. > Also you might try "Real-Time" in the CPU Priority window. > > 73, > Dudley > WA5QPZ > > At 08:28 AM 7/27/2007, Tim Ellison wrote: > >> Art, >> >> The RX and TX threading is very different between the two versions. >> Make sure that a brand new DB is used for 1.9.1 (no imports) and you >> may have to increase the hardware (soundcard) buffer setting and or >> PowerSDR audio buffer settings to get it to work properly. >> >> -Tim >> ---- >> >> >> >> > _______________________________________________ FlexRadio mailing list FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archive Link: http://www.mail-archive.com/flexradio%40flex-radio.biz/ FlexRadio Knowledge Base: http://kb.flex-radio.com/ FlexRadio Homepage: http://www.flex-radio.com/ _______________________________________________ FlexRadio mailing list FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archive Link: http://www.mail-archive.com/flexradio%40flex-radio.biz/ FlexRadio Knowledge Base: http://kb.flex-radio.com/ FlexRadio Homepage: http://www.flex-radio.com/
