All audio buffers work the same: smaller buffers = lower latency & higher PC resource consumption larger buffers = higher latency & lower PC resource consumption
When you have multiple audio buffers in an audio chain, I have found that it is best to have them match. So if the PowerSDR audio buffer is 512, then a VAC audio buffer of 512 is recommended, but not required. The only place this is enforced is with the FLEX-5000/3000 where the PowerSDR audio buffer is synced with the Firewire audio buffer when you change the audio buffer with PowerSDR Setup (the recommended best practice)
For digital modes, the buffer size is not a big concern unless you are running low latency ARQ modes like Winmore there really isn't an operational advantage between using very small (512) or very large (2048) audio buffers.
At a 96 KHz sampling rate, I usually use 1024 buffers. For a 48 KHz sampling rates (using the FLEX-1500) I use 512.
-Tim --- Tim Ellison, W4TME Product Management, Sales & Support FlexRadio Systems^(TM) 4616 W Howard Ln Ste 1-150 Austin, TX 78728 Phone: 512-535-4713 Ext. 223 Email: [email protected] <mailto:[email protected]> Web: www.flexradio.com <http://www.flexradio.com> logo /Tune In Excitement^(TM) PowerSDR^(TM) is a trademark of FlexRadio Systems/ On 8/26/2011 1:05 AM, Steven Hess wrote:
Just got done installing PowerSDR v2.2.2 BETA. Setting up VAC I noticed the Buffer size at 514. I always run this at 2048 what is the advantage of running 514 or is that just being conservative? 48K and 2048 is how I play DIG-U am I missing something?
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