Mike, Good reference for the cause and effect of the DSP filters is Appendix A in the current manual. You must be careful of the lower DSP buffer settings as it will spread the signal out.
If the delay is in Skype, work with matching the Skype sample rate to the PowerSDR sample in the VAC window.. This seems to really helps some of the digital modes, so that there is less work in the buffer transitions.. Funny things can happen when sample rates don't match, somewhere a program has to make the transition of sample rates.. Sample rates, Sample rates.. Not just the buffers, although they may have an effect also.. I am not sure why changing the DSP buffer and then back to default would affect the Skype transfer, but I am sure that is something being resync'd. 73, Dudley WA5QPZ FlexRadio Systems (512) 250-8595, Option 2 Email: dud...@flex-radio.com Web: www.flex-radio.com "Tune in excitement!" ™ On Thu, Oct 14, 2010 at 10:36 PM, Mike Schwendeman <m...@s3com.net> wrote: > Hi, Dudley; I'll add my comments to your email below: > > > On 10/14/10 4:03 PM [Oct 14], FlexRadio Support, Dudley Hurry wrote: > >> Mike, >> >> I am not sure that the DSP buffers are what you real issue with Skype is, >> check you VAC buffering, >> > > While I respect your suggestion, all I can say is that I have a "cause > and effect" which sure seems to at least CHANGE the audio delay. (I had > changed PowerSDR > DSP > Options > Buffer size > Phone from 2048 to 512, as > an example.) I do not recall seeing any change, when I tried different > values for the VAC buffer size. (-Maybe I missed something?) > > > in PowerSDR, VAC and in Windows Sounds. Win7 seems to love to reset the >> Virtual Audio lines 1 and 2 to 44K for sample rather than the 48K that we >> have VAC buffering set for in the VAC tab. >> > > I have checked, and VAC is behaving; I see that the "SR" is set to 4800. > I will add that I am running Windows XP-SP3, not Windows 7. > > > Also you might just try to lower the VAC buffering to better match the >> Skype buffer (not sure where in Skype to find this, so you may need to play >> with the settings) instead of 48K try a lower rate, 22050.. The buffer >> transitioning may be more the issue. Let us all know the results. >> > > In looking for any "Skype buffer" settings, I had no luck; I even > searched for this in the Skype application. > > Again, as a recap: I am predictably able to decrease my audio > delay-time by changing the "PowerSDR > DSP > Options > Buffer size > Phone" > from the default to some lower value. -But, if i leave the setting at a 512 > or 256 as an example, my transmitted signal is no longer SSB, but a sort of > DSB. My CW note (in TUNE mode) is no linger a single tone. (See my original > email for a more complete coverage of the details.) > > Why is it that my transmitted SSB signal is getting messy, with me > emitting what seems like a DSB signal, when I change the PowerSDR > DSP > > Options > Buffer size > Phone from 2048 to 512 or 256??? -Keep in mind that > this is on two computers, running a Flex-3000 and a Flex-5000a. > > 73; -Mike- KØJTA > >> >> >> 73, >> Dudley >> >> WA5QPZ >> > _______________________________________________ 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.flexradio.com/ Homepage: http://www.flexradio.com/
