Search found 44 matches

by Ecwl
28 May 2022 03:08
Forum: Acourate
Topic: Combining Virtual Bass Array and Alternative to VBA Pre-filters
Replies: 3
Views: 850

Re: Combining Virtual Bass Array and Alternative to VBA Pre-filters

Following Uli's suggestion in the original thread of adding a FDW before step 7, I found these increased decay times were mostly tamed. The cost is a smoothing of the inverse resulting in slightly less flat bass FR. Thanks for pointing this out to me. I’ve actually gone back to a VBA filter alone. ...
by Ecwl
15 May 2022 15:57
Forum: Acourate
Topic: Amplitude FDW Optimisation based on RT20/RT30 Analysis
Replies: 5
Views: 201

Re: Amplitude FDW Optimisation based on RT20/RT30 Analysis

STransform is downloadable on the Acourate website under Infocenter, Download.

Very interesting. Thanks for sharing. I’ll have to try this out for my system.
by Ecwl
06 Mar 2022 01:27
Forum: Acourate
Topic: Only correct under Schroeder freq?
Replies: 11
Views: 2448

Re: Only correct under Schroeder freq?

After writing the above post, I realized I can get very similar results, perhaps even superior results by simply setting the FDW in Macro 1 to a high value for the low frequency and a low value for the high frequency (an extreme choice would be 30/1). There are pros and cons compared to the SplitNJo...
by Ecwl
05 Mar 2022 19:24
Forum: Acourate
Topic: Only correct under Schroeder freq?
Replies: 11
Views: 2448

Re: Only correct under Schroeder freq?

In the past month, I have gone back to a convolution filter that only uses partial correction. The reason was that while I appreciate the coherence of sound from a full frequency correction, I have found that a partial correction (following a similar target curve) often has better transient response...
by Ecwl
26 Feb 2022 16:57
Forum: Acourate
Topic: Virtual Bass Array
Replies: 22
Views: 10728

Re: Virtual Bass Array

I have to admit, I’ve gone back to this again because I always worry that my room length measurement is off, e.g. is it 3.33m or 3.30m or 3.36m So I finally decided I was just going to measure the peak of that resonance frequency, e.g. 51.27Hz which would be 0.01950s = 936 samples. Even though I was...
by Ecwl
24 Feb 2022 13:32
Forum: Acourate
Topic: Only correct under Schroeder freq?
Replies: 11
Views: 2448

Re: Only correct under Schroeder freq?

Thanks. I see now if we don't use SplitNJoin and just use Macro 3, in addition to the gain issue, the phase correction between Macro 3 and the 1:1 filter would also be different. Or does Macro 4 only look at the amplitude and not the phase of the Inverse filter so the use of SplitNJoin would only ad...
by Ecwl
24 Feb 2022 04:47
Forum: Acourate
Topic: Only correct under Schroeder freq?
Replies: 11
Views: 2448

Re: Only correct under Schroeder freq?

I think if you don't use Archimago/CutNWindow technique, and only rely on Macro 3, then your target below cutoff frequency would need to match the measured frequency response above the cutoff frequency. Otherwise, the volume level of the below cutoff frequency and above cutoff frequency can then be ...
by Ecwl
18 Jan 2022 04:47
Forum: Introduce yourself and your setup
Topic: Peter from Germany
Replies: 9
Views: 4956

Re: Peter from Germany

Sorry, not sure if this question is for Uli or for Peter
I know what ICPA is, but what is AIR?
Also is there a specific reason why the new convolution filter you got didn’t have a subsonic filter included?
by Ecwl
27 Dec 2021 16:12
Forum: Acourate
Topic: Question before buying Acourate
Replies: 19
Views: 3297

Re: Question before buying Acourate

I used to have a setup fairly similar to yours with speakers+subwoofers. You don’t have to switch to an active crossover setup to use Acourate. Just like we don’t have to switch from passive speakers to active speakers to use Acourate. But of course, we can’t time align the subwoofers and speakers a...
by Ecwl
23 Dec 2021 21:36
Forum: Room macros
Topic: Macro 6 ?
Replies: 32
Views: 6311

Re: Macro 6 ?

I just re-measured my system and decided to measure at a slightly louder volume this time around. The LSR3/Acourate logsweep recording volume bar never got above -10dB. My previous measurements, the loudest it got was maybe -20dB and most of the time was staying at -30dB. What I found was that there...