ARTA - using ARTA to measure room acoustics! - diyAudio
Go Back   Home > Forums > Design & Build > Software Tools

Software Tools SPICE, PCB CAD, speaker design and measurement software, calculators

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 25th November 2009, 01:55 PM   #1
OMF is offline OMF  Norway
diyAudio Member
 
Join Date: Nov 2009
Default ARTA - using ARTA to measure room acoustics!

Hello Once again....

I have been able to start my testing with ARTA . However – I have millions of questions on how to use it best and get reliable results. I should also mention that (At the moment) I only use it to measure the sound in my listening room – to optimize my room correction algorithm and acoustical tratments (absorbers, HelmHolz etc)

Since there will be a lot of questions in this post – I will assing each of them with a number for reference!

So – I am trying to get the best possible sound from my HiFi system. This system is currently composed by:

*PC (JRiver music player, Convolver VST plug-in with FIR room correction and XO filter)
*Lynx AES 16e PCI soundcard with 8 channel digital I/O
*Digital Audio Denmark AX 24 – 6 channel DA convert and 2 channel Mic preamp/AD
*3 x Dynamic Precision DP A1S EBW (Norwegians amps, excellent specs and bandwith)
*Overkill Audio Finale loadspeakers (12`sealed enclosere, 10`open baffel, Manger head units)

Acoustical treatment – 2 x Svanå V6 + 2 x V4 HelmHolz resonators
And lots of absorbers that might make its way into the living room!

For measurements I use a EarthworksM30 connected to the Micpreamp of the AX24(which is SOTA)

Some pictures of the set up:

Amps, DAC and Helmholz and diffursors from Svanå
Click the image to open in full size.

The way I usually listen....
Click the image to open in full size.

The rest of the room (and a couple more HelmHolz)
Click the image to open in full size.


OK...so I hope this thread can be a «how to» and sharing experiences» with the ARTA acoustic software.

All my measurements are taken in the sweetspot!

As far as I understand you can retrieve pretty much every analysis from the impulse respons.
And I have been able to record the impulse respons with this set up:

1)Is this the most accurate/best way to record the impulse respons?

Click the image to open in full size.

I used this to create the two most «interesting» measurements for my set up:

Cumulative Spectral Decay
2)Does my CSD look OK ?
(I had expected decay time difference to be much larger between low frequencies and high frequencies. I had also expected to see standing wawes much clearer!)

Click the image to open in full size.

Another graph I was very interested in was the reverbation times:

3) Does this look OK (I did naturally expect some of the same behaviour as for the CSD – and I am very suprised that it actually falls below 300 Hz)

Click the image to open in full size.

4)My forth questions is about drivers.

I am using digital crossovers in my system – so in another program I am using (Audiolense – which creates the FIR filter for my correction) I can use ASIO drivers – and do partial measurement for each output! Typically when doing a frequency sweep the outoput will be:
Output 1 – left channel DC-150Hz
Output 2 – Left Channel 150-700 Hz
Output 3 – Left Channel 700-25000Hz.
And 4,5 and 6 for rght channel...?

Is such a set up possible in ARTA...?

If not – I will have to rout the output thru a digital loop with crossovers – and that causes quite a lot of latency!

Any feedbacks are welcome!

Thanks!

Best regards
OMF
  Reply With Quote

Reply


Hide 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
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
ARTA ente Multi-Way 213 14th October 2014 03:17 AM
ARTA calibration help augerpro Multi-Way 5 14th June 2009 10:11 PM
ARTA help Cousin Billy Multi-Way 2 13th February 2009 12:16 AM
Can 'ARTA' measure tube electronics? Cousin Billy Multi-Way 5 6th December 2008 01:35 PM
Arta is SWEET!! ch83575 Multi-Way 7 23rd February 2007 12:27 AM


New To Site? Need Help?

All times are GMT. The time now is 11:30 PM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright ©1999-2014 diyAudio

Content Relevant URLs by vBSEO 3.3.2