Support

If you have a problem or need to report a bug please email : support@dsprobotics.com

There are 3 sections to this support area:

DOWNLOADS: access to product manuals, support files and drivers

HELP & INFORMATION: tutorials and example files for learning or finding pre-made modules for your projects

USER FORUMS: meet with other users and exchange ideas, you can also get help and assistance here

NEW REGISTRATIONS - please contact us if you wish to register on the forum

Band splitter with ideal phase response and no latency ??

DSP related issues, mathematics, processing and techniques

Re: Band splitter with ideal phase response and no latency ?

Postby martinvicanek » Wed Mar 18, 2020 10:00 am

Optimized linear phase reconstruction 5-band splitters, 3-pole and 4-pole versions.
Attachments
SmartSplitter.fsm
(39.7 KiB) Downloaded 1452 times
User avatar
martinvicanek
 
Posts: 1315
Joined: Sat Jun 22, 2013 8:28 pm

Re: Band splitter with ideal phase response and no latency ?

Postby steph_tsf » Wed Mar 18, 2020 3:33 pm

Thanks, Martin. Such optimization condensate is very impressing. I've just realized that such transient-perfect quasi-synchronous band splitter family may be useful, when coupled to precise compressors-limiters, for maintaining under strict limits, across the whole audio spectrum, the error signal that a Widrow-Hoff LMS Machinery is processing. I've just completed a 64-tap Widrow-Hoff LMS Machinery. No bells and whistles yet. No optimization yet. Just a barebone Widrow-Hoff LMS Machinery, whose code and labels are "textbook" compliant.
See it here : http://www.dsprobotics.com/support/viewtopic.php?f=4&t=38857
It is cloning (identifying) the transfer function of a "plant" consisting in three generalized IIR Biquads in series. I designed the "plant", for resembling a medium speaker driver.

Have a nice day
steph_tsf
 
Posts: 249
Joined: Sun Aug 15, 2010 10:26 pm

Band splitter with ideal phase response (and some latency)

Postby martinvicanek » Sun Mar 22, 2020 8:39 pm

Just for completeness I am posting a five-band splitter with linear phase for each band (and any combination thereof). It does have some (unavoidable) latency in order to make the filters causal. Slope is 24dB/octave, CPU load is not bad.

Have fun!
Attachments
LinPhaseBandsplitter.fsm
(105.32 KiB) Downloaded 1479 times
User avatar
martinvicanek
 
Posts: 1315
Joined: Sat Jun 22, 2013 8:28 pm

Re: Band splitter with ideal phase response (and some latenc

Postby latour » Mon May 22, 2023 9:41 am

martinvicanek wrote:Just for completeness I am posting a five-band splitter with linear phase for each band (and any combination thereof). It does have some (unavoidable) latency in order to make the filters causal. Slope is 24dB/octave, CPU load is not bad.

Have fun!

Hi Martin, this is a great module, but it only correctly works in poly mode, not mono (blue).

In mono mode, there's only 2 usable bands, "highpass" and "bandpass3" : "bandpass3" contains sound of "bandpass2", "bandpass1" and "lowpass", but if i check others outputs than "highpass" and "bandpass3", there's no signal available. Is there a way to correct it? Thank for your great work.
latour
 
Posts: 6
Joined: Mon Sep 08, 2014 1:46 am

Re: Band splitter with ideal phase response and no latency ?

Postby martinvicanek » Mon May 22, 2023 7:13 pm

Hi latour, it does work in blue here, see attachment. Can you post a schematic to demonstrate the issue that you encounter?
Attachments
LinPhaseBandsplitter_blue.fsm
(149.08 KiB) Downloaded 583 times
User avatar
martinvicanek
 
Posts: 1315
Joined: Sat Jun 22, 2013 8:28 pm

Re: Band splitter with ideal phase response (and some latenc

Postby martinvicanek » Wed May 24, 2023 8:08 am

latour wrote:[...] it only correctly works in poly mode, not mono (blue).

I think I know what the problem was: The splitter module expected the input signal at all 4 SSE channels. This might not be the case in every usecase. Now fixed, and included more bandsplitter variants.
Attachments
LinPhaseBandsplitter3.fsm
(167.39 KiB) Downloaded 608 times
User avatar
martinvicanek
 
Posts: 1315
Joined: Sat Jun 22, 2013 8:28 pm

Re: Band splitter with ideal phase response and no latency ?

Postby latour » Thu May 25, 2023 4:42 pm

It now works perfectly. Thank you Martin.
latour
 
Posts: 6
Joined: Mon Sep 08, 2014 1:46 am

Previous

Return to DSP

Who is online

Users browsing this forum: No registered users and 18 guests

cron