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Search: Posts Made By: andyc56
Forum: AV Home Theater   12-03-17, 11:00 PM
Replies: 10
Views: 1,456
Posted By andyc56
Re: Determining Total Potential SPL for multiple Subs

It's not you. It's a complex problem. When you're ready, ask here, as I'm eliminating support in the main MSO thread.
Forum: AV Home Theater   11-28-17, 09:49 PM
Replies: 10
Views: 1,456
Posted By andyc56
Re: Determining Total Potential SPL for multiple Subs

Yes, that's me.



Yes, with the caveat that MSO does not explicitly take into account dynamic range issues. To really do a good job of integrating dissimilar subs, you need to know some...
Forum: AV Home Theater   11-28-17, 03:49 PM
Replies: 10
Views: 1,456
Posted By andyc56
Re: Determining Total Potential SPL for multiple Subs

The "HD" designation of the 4x10 HD appears to be somewhat of a misnomer compared to the distinction between the 2x4 and 2x4 HD. The 2x4 has a 28/56-bit fixed-point DSP chip and a short maximum...
Forum: AV Home Theater   11-26-17, 08:41 PM
Replies: 10
Views: 1,456
Posted By andyc56
Re: Determining Total Potential SPL for multiple Subs

If you use the 2x8. make sure to use a 48 kHz plugin. The reason is that the 96 kHz plugin has large inaccuracies for filters operating at very low frequencies due to the finite precision of the...
Forum: REW Forum   06-03-17, 03:24 PM
Replies: 10
Views: 1,983
Posted By andyc56
Re: Question for John about "Q" definition for PEQ of different HW

Wow. I hadn't messed with the .arp files before, as I don't actually have a unit. But I just tried playing with them a bit and was able to verify some of what you said above. Stereo mode is indeed...
Forum: REW Forum   06-03-17, 11:58 AM
Replies: 10
Views: 1,983
Posted By andyc56
Re: Question for John about "Q" definition for PEQ of different HW

A user in another forum did some frequency response tests...
Forum: Audio Processing   05-22-17, 10:05 AM
Replies: 6
Views: 2,348
Posted By andyc56
Re: Anyone here using Multi-Sub Optimizer?

If you're happy with what you have, it might make more sense to leave well enough alone, as there is a substantial learning curve involved with MSO. It seems to be most beneficial in difficult...
Forum: Audio Processing   05-22-17, 07:35 AM
Replies: 6
Views: 2,348
Posted By andyc56
Re: Anyone here using Multi-Sub Optimizer?

To get the most out of MSO, one should have one DSP channel per sub so that each can be EQ'ed independently. With two DSP channels in the BFD1124 and three subs, this means two subs need to be...
Forum: Audio Processing   05-21-17, 05:29 PM
Replies: 6
Views: 2,348
Posted By andyc56
Re: Anyone here using Multi-Sub Optimizer?

Hi,

I'm the author of the software and have been helping mirekti with it in another thread.

Stereo subs won't work correctly with Multi-Sub Optimizer (MSO), as its internal calculations assume...
Forum: REW Forum   01-14-17, 12:07 AM
Replies: 10
Views: 1,983
Posted By andyc56
Re: Question for John about "Q" definition for PEQ of different HW

I've added my observations about this issue to an article on my site (http://andyc.diy-audio-engineering.org/parametric-eq-parameters-1.html), including the derivation of the half-gain bandwidth of a...
Forum: REW Forum   01-05-17, 05:18 PM
Replies: 10
Views: 1,983
Posted By andyc56
Re: Question for John about "Q" definition for PEQ of different HW

Thanks for that. In the documentation for the generic PEQ, I was initially puzzled to see the expression for the half-gain bandwidth as f0/Q. I've been familiar with this relationship for a...
Forum: REW Forum   01-02-17, 05:20 PM
Replies: 10
Views: 1,983
Posted By andyc56
Question for John about "Q" definition for PEQ of different HW

Hi John,
Apologies in advance for the lengthy post.

I wrote a software program that makes extensive use of PEQ filters for sub EQ in the modal region. In order for the user's final measurements...
Forum: REW Forum   10-13-16, 07:47 PM
Replies: 1
Views: 657
Posted By andyc56
Variable smoothing: really 1/48 oct below 100 Hz?

In connection with an earlier thread about smoothing (http://www.hometheatershack.com/forums/rew-forum/156961-cant-get-new-charts-show-unsmoothed-graphs.html), I was doing some experiments with REW. ...
Forum: REW Forum   10-05-16, 02:08 PM
Replies: 6
Views: 651
Posted By andyc56
Re: cant get new charts to show unsmoothed graphs?

Thanks for this. I found that in order to return to completely unsmoothed graph behavior, one must also perform a Graph, Remove Smoothing operation after clearing the Allow 96 PPO log spacing and...
Forum: REW Forum   10-01-16, 04:15 PM
Replies: 16
Views: 1,356
Posted By andyc56
Re: REW V5.17 Beta 10 smoothing bug

Thanks! I've since gotten a new mic from Cross-Spectrum Labs, so the cal file should be a lot better. I guess some of those earlier Dayton EMM-6 cal files were questionable.
Forum: REW Forum   09-30-16, 09:26 AM
Replies: 16
Views: 1,356
Posted By andyc56
Re: REW V5.17 Beta 10 smoothing bug

I'm on Win 7 x64 and can't verify this. However, I do see one quirk. I have an MDAT file with two nominally identical measurements that were saved with all smoothing disabled. The frequency range...
Forum: REW Forum   04-16-16, 11:40 AM
Replies: 81
Views: 28,529
Posted By andyc56
Re: UMIK-1 timing reference and Phase

Yes, MSO does need the phase to perform the complex summation. However, it does not require that the absolute delay of each measurement be correct. It only requires, for a given complex summation,...
Forum: REW Forum   04-15-16, 04:16 PM
Replies: 81
Views: 28,529
Posted By andyc56
Re: UMIK-1 timing reference and Phase

Hi Mike,

Are you AV_mike over at AVS? I was asking because you mentioned MSO in an earlier post. Anyway, I thought about this very thing a few weeks ago. At first, I thought it might invalidate...
Forum: REW Forum   03-10-16, 09:52 AM
Replies: 81
Views: 28,529
Posted By andyc56
Re: UMIK-1 timing reference and Phase

Hi all. I'm the guy who wrote the Multi-Sub Optimizer (MSO) software.

I mentioned this in another thread, but it's worth repeating here. I used to have big, bold warnings about using MSO with...
Forum: Testing   03-08-16, 08:54 AM
Replies: 27,740
  STICKY^ Post Padding Thread
Views: 872,868
Posted By andyc56
Re: Post Padding Thread

This is padding post number 5. We're there, dude!
Forum: Testing   03-08-16, 08:51 AM
Replies: 27,740
  STICKY^ Post Padding Thread
Views: 872,868
Posted By andyc56
Re: Post Padding Thread

This is padding post number 4
Forum: Testing   03-08-16, 08:48 AM
Replies: 27,740
  STICKY^ Post Padding Thread
Views: 872,868
Posted By andyc56
Re: Post Padding Thread

This is padding post number 3
Forum: Testing   03-08-16, 08:46 AM
Replies: 27,740
  STICKY^ Post Padding Thread
Views: 872,868
Posted By andyc56
Re: Post Padding Thread

This is padding post number 2
Forum: Testing   03-08-16, 08:44 AM
Replies: 27,740
  STICKY^ Post Padding Thread
Views: 872,868
Posted By andyc56
Re: Post Padding Thread

This is padding post number 1
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