KVR Audio

perottol · Post by **perottol** » Thu Feb 02, 2006 8:38 am

Yesterday I was about to rip my hair of while I was trying to use two instances of Simulanalogs JCM900.
After loading them the CPU usage was 60 %, and it was playing just fine, but suddenly it went out of controll and took 100 %, and I had to wait for minutes everytime I pushed a button.

SX2, Pentium 4 - 1.8 GHz, 1 gig ram.

The project was recorded in 48 kHz. Earlier I have used several instanses of the JCM900 in the same project without problems, but this was 44.1 kHz.

Anyone know anything about this?

scuzzphut · Post by **scuzzphut** » Thu Feb 02, 2006 8:57 am

Many have said that it's a bad case of the pentium denormal problem - although I have had exactly the same problems on my AMD Athlon XP

I eventually gave up with Simulanalog for that very reason.

The best advice I can give you is to try Cortex ...

fgimian · Post by **fgimian** » Thu Feb 02, 2006 10:27 am

I've had the same problem and contacted the developer. He responded once but I never heard from him after that.

I solve the issue by placing a dithering plugin before the amp, but a denormal plugin would be best, just keep turning down the noise as much as you can before it jumps to 100 % again.

I'm very surprised this also happens on AMDs, hopefully adding noise before it will also work on the AMD.

I have not found any amp plugins that come close to SimulAnalog (maybe Guitar Rig by NI), which is why I use a Line6 GuitarPort for most things, but the SimulAnalog amp is definitely in the same league as the Line6 stuff.

I prefer the Line6 for most things though, I find it fits in tracks a little better

Cheers
Fots

perottol · Post by **perottol** » Thu Feb 02, 2006 12:54 pm

I noticed that it had problems processing silence, so maybe a plug to add noise would be the thing?

Mutant · Post by **Mutant** » Thu Feb 02, 2006 1:02 pm

soundpalace wrote:I'm very surprised this also happens on AMDs, hopefully adding noise before it will also work on the AMD.

Not on my Duron 1600 - one instance of JCM900 takes 3,7%-4,1% at 44100 and 4,0%-4,8% at 48000.

perottol · Post by **perottol** » Thu Feb 02, 2006 1:04 pm

You lucky bastard... :)

gunnare · Post by **gunnare** » Thu Feb 02, 2006 1:06 pm

Yes, its the denormal problem, when there is no sound. It has been discussed here many times. The best thing you can do if the machine hangs, is to play a note, that helps.

Pentium 4 - 1.8 GHz, that is the worst prosessor for the denormal problem. I have 1.7 Ghz, it has the same problem.

The plugin was a part of a research project and is not supported. The developer is working with other projects now.

gunnare

boin · Post by **boin** » Thu Feb 02, 2006 8:23 pm

Have any of you tried to put digitalphishphone's Normalizer in front of the offending plugins? Never tried with Simulanalogs but I've got good results solving denormal problems of other (FX) plugins.

perottol · Post by **perottol** » Fri Feb 03, 2006 8:49 am

Yesterday i convertet the whole project into 44.1 kHz, and I obtained stability. No problems at all. I did a mixdown of the tracks, and problem solved (for now).

boin: where can I check out the digitalphishphone normalizer? URL, demo...?

gunnare: takk for hjelpa, skal sjekke ut dette med denormal.

finnbio · Post by **finnbio** » Fri Feb 03, 2006 9:07 am

Hi, it's here:

http://www.digitalfishphones.com/

By the way: I don't have the CPU spike problem with my athlon XP2000, but at 48 kHz (using the ASIO driver of the Audigy platinum, which are restricted to 48 kH), I hear the uprocessed sound at the same time as the processed sound, which stinks, too. It's fine at 44.1 (using the WMD ?? driver). Haven't tried with the ASIO4all.

Best
Alex

zmora · Post by **zmora** » Fri Feb 03, 2006 9:23 am

No any troubles on my Athlon Tunderbird 900 Mhz.
In Traction project I use 4-5 sets -JCM900 + stombox,Red Net for bass with some vst comp plus others like SSL comp on drums tack and few of rest.

CPU problems with Simulanalog