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meep meep (FFT alternative)

Jedinhopy
KVRian
 
825 posts since 20 May, 2010, from Home

Postby Jedinhopy; Sun Dec 04, 2016 9:56 am Re: meep meep (FFT alternative)

Miles1981 wrote:
Jedinhopy wrote:steep FFT brickwall filters.

Don't forget that these introduce heavy aliasing.
Ringing. Not aliasing.
matt42
KVRian
 
919 posts since 9 Jan, 2006

Postby matt42; Sun Dec 04, 2016 10:02 am Re: meep meep (FFT alternative)

Jedinhopy wrote:
Miles1981 wrote:
Jedinhopy wrote:steep FFT brickwall filters.

Don't forget that these introduce heavy aliasing.
Ringing. Not aliasing.
I think Miles is talking about naive FFT filtering not actual FFT convolution. Simply taking the FFT clearing out some bins and then inverse FFTing will result in aliasing. FFT convolution will not alias.
Jedinhopy
KVRian
 
825 posts since 20 May, 2010, from Home

Postby Jedinhopy; Sun Dec 04, 2016 10:06 am Re: meep meep (FFT alternative)

matt42 wrote:
Jedinhopy wrote:
Miles1981 wrote:
Jedinhopy wrote:steep FFT brickwall filters.

Don't forget that these introduce heavy aliasing.
Ringing. Not aliasing.
I think Miles is talking about naive FFT filtering not actual FFT convolution. Simply taking the FFT clearing out some bins and then inverse FFTing will result in aliasing. FFT convolution will not alias.
A:
(4096) FFT size with hanning windowing and 4x overlap will sound the best when brickwall filtering.
nobody_u_know
KVRist
 
53 posts since 10 Dec, 2013

Postby nobody_u_know; Sun Dec 04, 2016 12:24 pm Re: meep meep (FFT alternative)

(This thread ain't for FFT (bleauarchchch) chat.... haha.... Jus' kiddin')

I'm still on it, believe it or not

Waitin' on the evolution of optimization algo's. There's a new one every week (and it usually sux)

For a VERY funny (and sadly true) take on this, read this NOW https://github.com/fcampelo/EC-Bestiary

Cheers

Rich

ps. I already have non-ringing steep filters (very near linear), BUT they don't play well together (the adjacent ones, of course)
Jedinhopy
KVRian
 
825 posts since 20 May, 2010, from Home

Postby Jedinhopy; Sun Dec 04, 2016 12:43 pm Re: meep meep (FFT alternative)

nobody_u_know wrote:(This thread ain't for FFT (bleauarchchch) chat.... haha.... Jus' kiddin')
Auditory system modelling?
nobody_u_know
KVRist
 
53 posts since 10 Dec, 2013

Postby nobody_u_know; Sun Dec 04, 2016 12:56 pm Re: meep meep (FFT alternative)

Plain and simple IIRs

The boffins don't believe this filter exists

Trust me... It does ;)
Miles1981
KVRian
 
1255 posts since 26 Apr, 2004, from UK

Postby Miles1981; Sun Dec 04, 2016 1:12 pm Re: meep meep (FFT alternative)

Jedinhopy wrote:(4096) FFT size with hanning windowing and 4x overlap will sound the best when brickwall filtering.

It still aliases the temporal content as shown in this forum a few months ago. No matter how far you overlap, it won't be enough. Real brickwall filtering requires infinite overlap.
Jedinhopy
KVRian
 
825 posts since 20 May, 2010, from Home

Postby Jedinhopy; Sun Dec 04, 2016 1:22 pm Re: meep meep (FFT alternative)

Miles1981 wrote:It still aliases the temporal content as shown in this forum a few months ago.
You don't know what overlap means.
Miles1981
KVRian
 
1255 posts since 26 Apr, 2004, from UK

Postby Miles1981; Sun Dec 04, 2016 1:24 pm Re: meep meep (FFT alternative)

Jedinhopy wrote:You don't know what overlap means.

OK, I will just say lol in that case.
Jedinhopy
KVRian
 
825 posts since 20 May, 2010, from Home

Postby Jedinhopy; Sun Dec 04, 2016 1:28 pm Re: meep meep (FFT alternative)

Miles1981 wrote:
Jedinhopy wrote:You don't know what overlap means.

OK, I will just say lol in that case.
And you will just reply with junk like the other kvraudio users did in the past against me with a huge load of shit taking up many pages on the same forum thread.
nobody_u_know
KVRist
 
53 posts since 10 Dec, 2013

Postby nobody_u_know; Sun Dec 04, 2016 1:35 pm Re: meep meep (FFT alternative)

Can you boyz plz continue this in another thread. I don't need or want the publicity... LOL

Thx
nobody_u_know
KVRist
 
53 posts since 10 Dec, 2013

Postby nobody_u_know; Thu May 18, 2017 7:32 pm Re: meep meep (FFT alternative)

Nudda one.... sorry for the SLOW updates

Cheers

Rich

https://www.youtube.com/watch?v=nblF6IT0bS8
kamalmanzukie
KVRist
 
36 posts since 12 May, 2012

Postby kamalmanzukie; Sun Sep 17, 2017 2:37 pm Re: meep meep (FFT alternative)

that is actually starting to sound pretty impressive. it is also of great interest to me as i too ride the bandpass filterbank > fft hobby horse. about phase issues i have previously speculated on the possibility of zero phase, which if i understand correctly is just filtering - time reversal - filtering again - reversal. seeing what's possible makes me mad i bought photosounder, which can only make the sound of a smear

you can send me a pm if you wanna compare notes

also, everyone should stop being mean to jeninhopy. jedinhopy, where every you are out there, god bless ya
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