Simon Dropping the sample rate to 4100 in the PowerSDR set up for VAC eliminated any Spurs visible in fldigi.
>From quickly reading the VAC documentation I didn't grasp how I would change the sample rate from 4100 to 4800. As my primary audio sample rate is 48k I attempted to match the VAC PowerSDR setting to the same audio sample rate. So many buffer sizes and in sample rates which can be set in PowerSDR. I am having a hard time keeping them straight as I learn them. The driver buffer and sample rate. The DSP buffers . The regular audio buffer size and sample rate. The VAC buffer sample rate and buffer size. Cheers Steven On 02/02/2010 03:08 AM, Simon HB9DRV wrote: > Yuck! > > Looking at your screenshot again - the VAC Control Panel window - you're > going to have all sorts of rate conversions running, your cables are using > 44,100 as their sample rate. > > I would use a sample rate of 48,000 or 8,000 and *not* have the cable > running internally at 44,100, essentially keep the same sample rate running > through the whole process to avoid rate conversions. > > Converting 8,000 <=> 48,000 should be clean but converting 44,100 <=> 48,000 > could be messy. > > Simon Brown, HB9DRV > http://sdr-radio.com > > > >> -----Original Message----- >> From: flexradio-boun...@flex-radio.biz [mailto:flexradio-boun...@flex- >> radio.biz] On Behalf Of Steven L Hess >> >> Simon this is what I have >> Vac Settings PowerSDR settings >> <http://www.slhess.com/pictures/VACsetings.png> >> >> > > > _______________________________________________ > FlexRadio Systems Mailing List > FlexRadio@flex-radio.biz > http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz > Archives: http://www.mail-archive.com/flexradio%40flex-radio.biz/ > Knowledge Base: http://kc.flex-radio.com/ Homepage: > http://www.flex-radio.com/ > > -- Regards de KC6KGE "Up all night" Monitoring at least one of the following Frequencies: 3975, 7181, 14.329, 52.560, 146.550 Simplex tone squelch PL 100 and, 442.950 + PL 103.5 or 443.900 + PL 100. _______________________________________________ FlexRadio Systems Mailing List FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archives: http://www.mail-archive.com/flexradio%40flex-radio.biz/ Knowledge Base: http://kc.flex-radio.com/ Homepage: http://www.flex-radio.com/
