Go Back   Home > Forums > >
Home Forums Rules Articles diyAudio Store Blogs Gallery Wiki Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

Multi-Way Conventional loudspeakers with crossovers

rePhase, a loudspeaker phase linearization, EQ and FIR filtering tool
rePhase, a loudspeaker phase linearization, EQ and FIR filtering tool
Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Reply
 
Thread Tools Search this Thread
Old 4th January 2017, 08:05 PM   #1441
pos is offline pos  Europe
diyAudio Member
 
pos's Avatar
 
Join Date: Feb 2008
Location: Paris
Quote:
Originally Posted by mark100 View Post
Downsampling would be nice...

....and I take it you mean to allow for implementations in a Four-Audio type way....? Four Audio | FIR Filters: calculation power, length of impulse responses, and frequency resolution

I kinda made the same suggestion https://www.minidsp.com/forum/sugges...le-rates#27931
Four-Audio approach is more complicated and evolved than what I propose, as this would only be a matter of running the input SRC, DSP and ouptut at 32kHz.
I don't think 22kHz or lower would be possible with this approach as many DAC seem to limit accepted sampling rate range to 32kHz.

Quote:
The plate amps do look very interesting for a small two-way....I guess as long as the crossover is high enough. For my 650Hz crossover point, 300 taps struggles a little with the slope I'd like to use. It would be nice if the plugin allowed a little flexibility here....
Indeed, but it is perfect for a ~2kHz crossover point, and you can still use a few of the available biquads to help with the filters or EQs.

What version do you have?
__________________
2019-01-16: rePhase 1.4.3
  Reply With Quote
Old 5th January 2017, 01:48 AM   #1442
mark100 is offline mark100  United States
diyAudio Member
 
Join Date: Dec 2010
Hi POS, I have the 250 version.

The Four-Audio approach in one miniDSP unit isn't what I meant.
I meant your approach. So we can mimic what Four-Audio does, by using multiple miniDSP units running at different sampling rates.... like you described in the link you gave previously.
  Reply With Quote
Old 5th January 2017, 06:59 AM   #1443
pos is offline pos  Europe
diyAudio Member
 
pos's Avatar
 
Join Date: Feb 2008
Location: Paris
I see

devteam responded to your suggestion that they "might have something even better planned".
It is probably some sort of FFT convolution with a large number of taps.
Let's wait and see, but this kind of convolution invariably add some more delay, and is also more prone to implementation errors.

I wish there was an hardware/DSP convolution unit on the market powerful enough to do temporal convolution with a large number of taps without having to use decimation or FFT strategies...
__________________
2019-01-16: rePhase 1.4.3

Last edited by pos; 5th January 2017 at 07:01 AM.
  Reply With Quote
Old 5th January 2017, 09:41 AM   #1444
Kjeldsen is offline Kjeldsen  Denmark
diyAudio Member
 
Join Date: Dec 2003
Location: Randers, Denmark
What about the pro audio DSP audio interfaces? They come i several price ranges, but I don't know how powerfull the DSP's are, but some of them seems to be quite powerfull and expensive. You will ned a PC og Mac to program it, but otherwise they will work stand alone.
__________________
http://kjeldsensforbindelser.dk
  Reply With Quote
Old 5th January 2017, 12:55 PM   #1445
mark100 is offline mark100  United States
diyAudio Member
 
Join Date: Dec 2010
Quote:
Originally Posted by pos View Post

I wish there was an hardware/DSP convolution unit on the market powerful enough to do temporal convolution with a large number of taps without having to use decimation or FFT strategies...
I don't what decimation or FFT strategies mean, but whatever you say, ....I'm for
  Reply With Quote
Old 5th January 2017, 01:05 PM   #1446
mark100 is offline mark100  United States
diyAudio Member
 
Join Date: Dec 2010
Quote:
Originally Posted by Kjeldsen View Post
What about the pro audio DSP audio interfaces? They come i several price ranges, but I don't know how powerfull the DSP's are, but some of them seems to be quite powerfull and expensive. You will ned a PC og Mac to program it, but otherwise they will work stand alone.
I don't know of any pro-audio interfaces that have the FIR capability of even the smaller miniDSP units.
Pro-audio usually can't tolerate much latency, so big FIR blocks don't make a lot of sense in speaker management processors.
If you know of any, please link...very interested...

Here's a good post listing some current alternatives. The Xilica at the bottom is typical of pro units that I've seen specs for. https://www.minidsp.com/forum/opendr...tstart=0#21877

Last edited by mark100; 5th January 2017 at 01:07 PM.
  Reply With Quote
Old 5th January 2017, 01:27 PM   #1447
mwmkravchenko is offline mwmkravchenko  Canada
diyAudio Member
 
mwmkravchenko's Avatar
 
Join Date: Jan 2002
Location: Perth Canada
Quote:
Originally Posted by mark100 View Post
I don't know of any pro-audio interfaces that have the FIR capability of even the smaller miniDSP units.
Pro-audio usually can't tolerate much latency, so big FIR blocks don't make a lot of sense in speaker management processors.
If you know of any, please link...very interested...

Here's a good post listing some current alternatives. The Xilica at the bottom is typical of pro units that I've seen specs for. https://www.minidsp.com/forum/opendr...tstart=0#21877
I know for sure that Marani has FIR capability. And I'm pretty sure there are others.
__________________
Mark
www.kravchenko-audio.com
  Reply With Quote
Old 5th January 2017, 06:13 PM   #1448
BYRTT is offline BYRTT  Denmark
diyAudio Member
 
BYRTT's Avatar
 
Join Date: Dec 2009
rePhase, a loudspeaker phase linearization, EQ and FIR filtering tool
Quote:
Originally Posted by mark100 View Post
Nice chart BYRTT,

I've stopped everything until I sort out what the sound cards are unexpectedly contributing...will report back....
16 bit Behringer UCA222/UCA202 think is great value and probably good enough as measurement interface as seen below at 48kHz.
Attached Images
File Type: png 100.png (500.1 KB, 160 views)
  Reply With Quote
Old 5th January 2017, 07:03 PM   #1449
Kjeldsen is offline Kjeldsen  Denmark
diyAudio Member
 
Join Date: Dec 2003
Location: Randers, Denmark
Quote:
Originally Posted by mark100 View Post
I don't know of any pro-audio interfaces that have the FIR capability of even the smaller miniDSP units.
Pro-audio usually can't tolerate much latency, so big FIR blocks don't make a lot of sense in speaker management processors.
If you know of any, please link...very interested...

Here's a good post listing some current alternatives. The Xilica at the bottom is typical of pro units that I've seen specs for. https://www.minidsp.com/forum/opendr...tstart=0#21877
I haven't tried any myself, but here is one example

Four Audio | HD2

They sell them with frontpanel controls and without (black box), and they have an high end hifi version. They also sell the boards without connectors and chassis - but you probably should buy a lot.
__________________
http://kjeldsensforbindelser.dk

Last edited by Kjeldsen; 5th January 2017 at 07:07 PM.
  Reply With Quote
Old 6th January 2017, 11:30 AM   #1450
mark100 is offline mark100  United States
diyAudio Member
 
Join Date: Dec 2010
Thanks for the replies everyone,

The Marani stuff looks nice...I had not heard of them. I see their units max out at 1024 taps per channel.
Not surprising again, given pro-audio's inability to live with much latency.

Yes, the Four-Audio HD2 is a unique solution, but very $$$$....


The UCA222/202 caught my attention for sure!
But I really need XLR / phantom power for most of the measurements I make.

Anybody measured or seen measurements for a really clean, reasonably priced, conventional mic soundcard?

After measuring the three alternatives at my disposal... behringer UMC404, UMC1820, and X-32...I've decided the x-32 is the cleanest.

Hopefully will post new speaker measurements that include the sound card's starting (negative) contribution, later today.
  Reply With Quote

Reply


rePhase, a loudspeaker phase linearization, EQ and FIR filtering toolHide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
FIR linear phase plugin for MiniDSP? diyjb01 miniDSP 17 9th June 2016 01:35 PM
FIR filter design tool for Loudspeaker magnitude equalization ttmusic Software Tools 3 24th May 2013 08:30 PM
FIR Filtering experiences Olombo PC Based 8 10th February 2013 03:45 PM
AVX based FIR VST, crossover / EQ / DRC and delay KOON3876 PC Based 97 26th November 2012 07:18 AM
Phase EQ using FIR filters Grasso Multi-Way 2 2nd July 2003 10:37 PM


New To Site? Need Help?

All times are GMT. The time now is 11:49 PM.


Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2019 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 14.29%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2019 DragonByte Technologies Ltd.
Copyright ©1999-2019 diyAudio
Wiki