Go Back   Cockos Incorporated Forums > REAPER Forums > REAPER Compatibility

Reply
 
Thread Tools Display Modes
Old 07-05-2018, 01:34 PM   #1
joeyburns
Human being with feelings
 
Join Date: Jun 2008
Location: the alps
Posts: 11
Default Audio dropouts with higher (!) buffer sizes

I had to reinstall Win 10 and all my plugins and now I have a super weird issue: I get audio dropouts when I INCREASE the buffer size.

Why would I want to work with higher buffer sizes? Sonnox Supresser needs at least 512 samples.

128 and 256 samples work fine but beginning at 512, I get very frequent crackles. At 1024 samples the crackles are constant.

Any idea whats wrong with my system? Could a plugin cause this?

My system:
Win 10, Reaper 5.92
RME 802 clocked with a Lucid 88192 (changing clocking to internal doesn't help)
2x UAD pci-e
I send all tracks out to analog summing and then back into Reaper. Worked perfectly fine before.
joeyburns is offline   Reply With Quote
Old 07-09-2018, 10:30 PM   #2
drumphil
Human being with feelings
 
drumphil's Avatar
 
Join Date: Jun 2006
Location: Australia
Posts: 3,738
Default

Sounds like a UAD sort of problem to me.
drumphil is offline   Reply With Quote
Old 07-10-2018, 09:30 AM   #3
serr
Human being with feelings
 
Join Date: Sep 2010
Posts: 12,561
Default

Some audio interfaces have a max block size they support.
My MOTU's don't like anything over 1024 samples or the system crashes. My Apogee Rosetta800 likes a max of 1024 samples for HD sample rates but only 512 samples for SD sample rates.

I'm told this depends on the coding in the driver (which would be the class compliant driver in OSX for the Apogee) and it sure as heck isn't a published spec.

I don't know if this is your issue. Trouble at a 512 sample block size is suspicious. And running UA plugins in Windows sounds like a red flag of course.

How are you controlling sample rate and block size for the connected interface? Reaper Preferences/Audio/Device page (boxes ticked and values entered) or 3rd party control panel (boxes unticked in Reaper preferences to disable control from Reaper)? First choice is control from Reaper unless 3rd party control is required from the interface. Might be worth a revisit to this.
serr is online now   Reply With Quote
Old 07-10-2018, 04:10 PM   #4
Justin
Administrator
 
Justin's Avatar
 
Join Date: Jan 2005
Location: NYC
Posts: 15,721
Default

At a certain point increasing buffer sizes actually increases the CPU use, because blocks of audio start getting big enough to thrash the CPU's cache... How big that is depends on the CPU, channel counts of the tracks involved, FX used, etc.
Justin is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -7. The time now is 01:49 PM.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.