Where do the power from the "more amplification" go? It goes to the speakers, and therefore they are more stressed.
It is just that those extra power that goes to the speakers (to boost the amount of sound energy radiated from the speakers) is to compensate for the loss in the sound pressure that the listener experiences due to room mode dips/cancellations.
The other good thing about the Trinnov setup is that it also knows how loud you can get.
It still makes assumptions about the linearity of your setup and lack of compression, but it adds boost when it knows that you can add boost. You also have control over how much boost is allowed.
You can see here, I had the problem Amir mentioned. It had some trouble detecting my left surround. There’s a window sill and giant incline treadmill there.
During calibration, you set the volume in dBFS to hit about 80 dB. The mic is calibrated to SPL.
You can see the A and C weighted SPL. Here you see that my heights (
Meyer Sound MM-4XP hit 100 dB at my listening position which are 3.7 meters away for the front heights). My LCR, the
Meyer Sound Amie’s hit 104 dB.
My subwoofers, hit 123 and 120 dB. Note that the distance is also dependent on the DSP delay.
You can then see the COMPENSATED level two rows below.
Here, you see the MM-4XP’s getting boosted to 104 dB. This is a bit of an assumption. The Trinnov only knows for sure that I can hit 100 dB (pre) but it also knows that my dBFS was in the -30’s. It does the boost based upon what I tell it to do in the configuration. I can also tell it how aggressive I want the correction in terms of resolution (like 1/3 octave, etc.).
I showed the depth of some of the advanced settings in my Alt32 post.
Trinnov Altitude 32 Review and Measurements This is a review and some measurements of a Trinnov Altitude 32. This is an older unit with components that are several generations old. What makes the Altitude 32 different from the Altitude 16 is the ability to use AES/EBU digital outputs for all...
www.audiosciencereview.com
You can see that the compensated level of my subwoofers drops.
That number is telling you how my bass management will handle from 10 Hz to 20 kHz. Since my surrounds only go to 80 Hz or so (my subwoofer is covering everything below). Since my target curve is 100% flat in this demo, the subwoofer maintains its 102 dB extension.
With LFE, I get the full possibilities of 120 dB.
There are also some interesting things to do. While my surrounds hit 80 Hz, my height speakers need a much higher crossover point.
Since this makes some localization possible, the Trinnov lets me use all my subs for LFE but use my sub on the left side for my left height speakers and my sub on the right side for my right height speakers. This reduces localization.
I have borrowed subs to try out Waveforming and I believe you can still have the bass management configured with that positional bass, while still utilizing the double bass array style.
My room is really poor acoustically. This is more demanding on the roomEQ DSP. It’s narrow.
If you look at the final result, where I have it correct to 1/3 resolution and have the +/- 40 dB y axis it looks great.
But if you had a 40 dB spread on the Y-axis, this is what you see.
I have asked the Trinnov to correct only to 1/3 octave. But what if I ask it to show the measurements with only 1/24 smoothing?
Looks worse. BUT I can also ask Trinnov to correct to 1/24 and display 1/24
You can run into pre-ringing if you go crazy with correcting the frequency response, but you can adjust the FIR length (more correction and more pre ringing), and all sorts of things.
You might run into CPU issues if you are running 48+ channels with active crossovers, etc. The default configuration is good but conservative.
This kind of power is what makes Trinnov have the
potential to deliver superior sound to other DSPs.
With full analog room treatment and perfect speaker location, all the extra processing is less necessary.
www.trinnov.com
