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Old 09-20-2020, 03:54 PM   #19
Human being with feelings
Join Date: Feb 2008
Location: So Florida
Posts: 1,116

Originally Posted by serr View Post
Something is really off here!

I've heard many edge cases where HD sample rates shine and reveal a flaw from SD sample rates. I've heard examples of sample rate converters that run cleaner at HD vs SD. (Filtering off the sample rate frequency when it's RIGHT next to the audio band is hard it turns out.) Most of the time this stuff is transparent with modern algorithms though. Convert the sample rate on some audio with SOX or the stock Reaper src at the highest settings. Now convert it back (lossy from the already converted file). Now compare that twice over lossy conversion to the original audio. You can't tell at all in an A/B test and the thing nulls down to 90 or 100db or more with the original.

Sample rate conversion on the fly is another matter!
It uses significant CPU for one thing. (That's how you were putting your CPU use on blast FYI. The live on the fly conversion you were doing.) You can't use the highest non-realtime settings. The highest quality you can use on the fly is quite good but now we're into loss territory. If you're hearing what seems to be more accurate sound from after on the fly sample rate conversion vs native, something inadvertent is going on!

You have your block size dialed down to 32 samples. Presumably for some of the live performance work you do? Playing a MIDI instrument through VSTi sound module plugins or a guitar through an amp sim plugin? Or maybe running live sound for a stage? Something where you need to hear the output from the computer with no perceivable lag while you and/or others perform.

A point there to take away is... If you aren't doing anything live, you're setting the latency low for no reason and putting your machine on blast for no reason.

We usually see the more recent cutting edge machines with the guys doing orchestral work with literally hundreds of heavyweight sampler plugins all running live. Or guys recording actual orchestras with hundreds of channels. Workflow that raises your eyebrows a little. My now 10 year old 8 core 2.93 - 3.33 i7 machine with 32GB ram lets me mix at least 350 tracks (and as many or more plugins) of 96k audio (native recorded 96k) with a 5.1 surround mix.

So something doesn't add up here!
You're talking about a monster spec machine as though you have a Dell running Windows.
Thx serr,

no I sussed it out and I had my latency at 1024 it was just a corrupt file that needed to be rebuilt in another folder...ALL IS GOOD NOW!! (-:
onewayout is offline   Reply With Quote