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

ARTA
ARTA
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 13th January 2019, 06:36 PM   #711
DBMandrake is offline DBMandrake  Scotland
diyAudio Member
 
DBMandrake's Avatar
 
Join Date: Nov 2010
Location: Glasgow, UK
What sound card do you have ? And are you using an ASIO or directsound driver ? Are you sure the sound card natively supports 192Khz sample rate ?

If it doesn't, it will be sampling at a lower sample rate and then software upsampling it to 192Khz. This will cause a reduction in quality and can result in aliasing artefacts.

You need to confirm what sample rates are supported by the sound card in hardware, and don't go above the highest sample rate supported in hardware by the card as it's important to avoid any intermediate software resampling in the sound driver or windows.

Almost certainly the issue is the sound card or it's driver. I use 192Khz 24 bit all the time with ARTA and don't see artefacts like this.
__________________
- Simon
  Reply With Quote
Old 14th January 2019, 12:24 AM   #712
dch53 is offline dch53  Australia
diyAudio Member
 
Join Date: Jun 2015
Location: Perth, Western Australia
Quote:
Originally Posted by DBMandrake View Post
What sound card do you have ? And are you using an ASIO or directsound driver ? Are you sure the sound card natively supports 192Khz sample rate ?
Thanks Simon. I'm using a Juli@ card that I no longer use in my music server. It does indeed natively support 192kHz sampling rate. From what I've read, the Juli@ seems to be widely used in this role.

I'm testing a sound card interface at the moment.

It occurred to me that I should redo the loopback test at 192kHz/131072 and as you can see below, the harmonics look pretty much the same, albeit with a slightly lower noise floor, so maybe they're contributed by the sound card.

From what you're saying, I should use the highest sampling rate my sound card supports.

Varying FFT size appears to produce different results too. Should I be using the maximum FFT size also?

I thought ARTA used the right channel as reference to cancel out sound card contributions?

Regards, Dave.
Loopback -30dB Fs 192kHz FFT 131072.png
  Reply With Quote

Reply


ARTAHide 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
Arta box. miklos Equipment & Tools 2 19th September 2014 08:27 PM
Help with Arta- HOLMImpulse viki_v2 Software Tools 2 12th September 2012 03:04 AM
arta vs cliowin ermes Multi-Way 0 4th March 2011 03:37 PM
ARTA - using ARTA to measure room acoustics! OMF Software Tools 0 25th November 2009 02:55 PM
ARTA help Cousin Billy Multi-Way 2 13th February 2009 01:16 AM


New To Site? Need Help?

All times are GMT. The time now is 12:40 AM.


Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2019 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 15.79%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2019 DragonByte Technologies Ltd.
Copyright ©1999-2019 diyAudio
Wiki