KVR Audio

birrbits · Post by **birrbits** » Sat Jul 16, 2005 7:56 pm

heres some source in matlab format, even if you dont know matlab the code isnt too bad.
http://www.ee.columbia.edu/%7Edpwe/reso ... b/solafs.m

joer · Post by **joer** » Mon Jul 18, 2005 11:37 pm

Thanks for all the info and links, havn't replied due to major computer blow -- smoke and everything out of the back!!! mind you it hasn't been turned of for 3 years, turned out to be psu but took a hard drive with it

joer · Post by **joer** » Mon Jul 18, 2005 11:48 pm

I wan't to learn more about FFT algorithms at some point, but it seems to me that they are not that useful yet in terms of musician usable low latency "realtime" "on the fly"(sorry!) plugins due to cpu speed limitations, but please correct me!!

Joe

birrbits · Post by **birrbits** » Tue Jul 19, 2005 12:52 am

joer wrote:I wan't to learn more about FFT algorithms at some point, but it seems to me that they are not that useful yet in terms of musician usable low latency "realtime" "on the fly"(sorry!) plugins due to cpu speed limitations, but please correct me!!

Joe

Just depends on what you need to do & what you deem acceptable latency. The whole point of an FFT is doing math with less computations, but there is a tradeoff point.

russell2pi · Post by **russell2pi** » Tue Jul 19, 2005 3:20 am

Strictly it's not the amount of computations that are the problem, it's that the audio stream is divided up into frames, and each output sample depends, in general, on every input sample of the same frame --- so you necessarily cannot spit out output sample number 0 until you have input sample number N (where N is your frame size) --- viola, N samples of latency, no matter how quick your computations are. Depending on the application there can be ways to get around this (e.g. see the replies to my questions in the thread "Basic Q re latency"), which require larger but not impossibly large CPU loads.

joer · Post by **joer** » Wed Jul 20, 2005 12:14 am

Well, all the low latency fft pitch shifts sound unacceptably distorted to my ears, I am a bit fussy though!

joer · Post by **joer** » Wed Jul 20, 2005 12:36 am

fft is traditional stuff you can learn and I have 17 year old music students who do math in secondry school who explain it like it's nothing clever whatsoever!

second hand ideas, second hand code, second hand people trying desparately to be someone!!!!

calling it their work like it's art or something!!

not mentioning any names!

joe( after the pup! )

joer · Post by **joer** » Wed Jul 20, 2005 12:37 am

No foulmouthedness though!!!

Just nasty!

russell2pi · Post by **russell2pi** » Wed Jul 20, 2005 12:42 am

...???

joer · Post by **joer** » Wed Jul 20, 2005 12:44 am

Sorry, not you!

joer · Post by **joer** » Wed Jul 20, 2005 12:47 am

Actually, Bernsee is quite clear in his explanations too!

joer · Post by **joer** » Wed Jul 20, 2005 12:51 am

I'd like to see an "IDEA" though!

joer · Post by **joer** » Wed Jul 20, 2005 12:52 am

Just one!

Galleoneer · Post by **Galleoneer** » Wed Jul 20, 2005 12:56 am

joer wrote:after the pup!

How many beer?

joer · Post by **joer** » Wed Jul 20, 2005 1:48 am

Not enough!

DSP algorithms