"Why is it better to run 192kHz rather than 48kHz? My ear can't tell the difference.
Not necessarily "better", but there are differences. And you will never really hear a difference except in one specific case that has to do with RX filter width. At 192 KHz, there is less audio latency in PowerSDR and you can see a wider swath of bandwidth on the panadapter, but the RX and TX filter skirts are not as steep or the filters' absolute bandwidth as small as you can achieve (assuming the same RX and TX DSP buffer sizes) with a 48 KHz sampling rate. Higher sampling rates also consumes more PC resources. -Tim -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Drax Felton Sent: Monday, April 26, 2010 11:30 AM To: 'Gerald Youngblood' Cc: [email protected] Subject: Re: [FlexEdge] Raspy audio Thanks Gerald for your positive reply. That's the kind of answer I was looking for in the first place. My Flex Radio works wonderfully at 192kHz / Normal Mode / Win7 64 unless I try to run Google Earth while in voice USB. The problem continues even after I close Google Earth. Digi-USB / VAC doesn't have the issue that I've noticed. Why is it better to run 192kHz rather than 48kHz? My ear can't tell the difference. And are smaller buffers better? I can see this answer going both ways. -Drax, KB3X From: Gerald Youngblood [mailto:[email protected]] Sent: Monday, April 26, 2010 11:20 AM To: Drax Felton Cc: [email protected] Subject: Re: [FlexEdge] Raspy audio The "raspy audio" came into existence with the advent of Windows 7. It occurs only on some specific system configurations and to my knowledge is isolated to Win7. I have reported this on the reflector before but will repeat it here. I run PowerSDR Win7 64-bit on a Gateway SX2800-07 PC with zero issues. I run two receivers at 192 kHz and 512 buffers in Normal mode with no raspy audio. _______________________________________________ Flexedge mailing list [email protected] http://mail.flex-radio.biz/mailman/listinfo/flexedge_flex-radio.biz This is the FlexRadio Systems e-mail Reflector called FlexEdge. It is used for posting topics related to SDR software development and experimentalist who are using alpha and beta versions of the software. _______________________________________________ Flexedge mailing list [email protected] http://mail.flex-radio.biz/mailman/listinfo/flexedge_flex-radio.biz This is the FlexRadio Systems e-mail Reflector called FlexEdge. It is used for posting topics related to SDR software development and experimentalist who are using alpha and beta versions of the software.
