[Date Prev][Date Next] [Thread Prev][Thread Next] [Date Index][Thread Index][Author Index]

**To**:**Loopers-Delight@loopers-delight.com****From**:**van Sinn <vansinn@post.cybercity.dk>****Subject**:**Re: Convolution: How much CPU needed?****Date**:**Wed, 20 Oct 2010 23:04:15 +0200**

andy butler wrote: > van Sinn wrote: > >> Which leaves by far the worst CPU hog: Convolution, but how much ? > > > Depends on how large a sample you want to use. > Charles is right it's a very simple operation, > indeed your 31 band eq will likely use convolution as > the most efficient way to do the filtering. > > ...but there can still be an awful lot of work for the processor to do. > The eq is only going to have something like 1024samples to > calculate. > > I'm using a dual core 3GHz intel machine and > it just took 15s to convolve a 1 minute file with a 5s stereo sample. > > So..if I was running it real time (which I wasn't) > it seems reasonable to equate that with 25% use of resources. > ...and an equally rough calculation says that a 20s stereo sample > would be the absolute limit for real time convolution on my machine. > > ...which suggests that if you want to use the convolution for a long > reverb you might run out of processing power. > > Maybe if you're more revealing about what you want the convolution for > then someone whose actually got experience will be able to give you > some better info. > > andy butler Thanks Andy, Per and Charles. My bad - I should of course have stated the convolution purpose.. It's for running impulses to emulate the guitar amp/speaker/mic chain. Further, thinking back on theory on digtal signal processing, I agree on how compute intensive digital filters can be; should've used my brain ;) This part can of what the computer is intended to be used for can be left out if need be; it's more on the wish list than strict requirement. -- rgds, van Sinn

**References**:- Convolution: How much CPU needed?
*From:*van Sinn <vansinn@post.cybercity.dk>

- Re: Convolution: How much CPU needed?
*From:*andy butler <akbutler@tiscali.co.uk>

- Convolution: How much CPU needed?

- Prev by Date: Re: Convolution: How much CPU needed?
- Next by Date: Y2KX Thanks
- Previous by Thread: Re: Convolution: How much CPU needed?
- Next by Thread: Re: Convolution: How much CPU needed?
- Index(es):