Datasat RS20i BETA test and comparison with ADA Rhapsody/Trinnov TEQ-12!!!! - Page 8

Blocked partially by chair cushions (damn overstuffed chairs- I want Irwins), also the crossovers are similar, but not the same- the components are different (same values, but from different manufacturers) I'm sure some of that difference is an electrical response difference.

My guess, though, is that the chairs are shading the path of the tweeter-microphone, and that's causing the severe dip. This has shown up all along in this room, and it's a compromise that we're willing to take at the moment (I've had to update/upgrade things as time goes by, the chairs are on the chopping block). I will say this; they are of similar design to the very popular Berklines.

Dan

BTW- thanks Carl, I was thinking about that earlier on. Now that I've done it, can I go back to that screen and rename, then bypass taking the measurements all over- or do I have to start from scratch with the channels independently named??

Got it, TEQ was the same way; I figured I was going to have to do that.

Looks like another busy day tomorrow...

So far the tonality is very "Class A- like" . I can see how Peter would use this with Dirac and the PHC speakers- Dirac offsets the speakers' downfall: that horn.

There's certainly more work to be done, but the Dirac is doing a very nice job tonally for a semi-rough once-over. We'll see how things turn out as I drill-down into the capabilities of the device....

Dan

Steven, what do you mean by "minimum phase portion"? If you're talking about the greater number of phase rotations in the subs vs the highpass sections, or the midbass vs say the vocals- you can see (although somwhat tough to make out) that there is correction going on throughout the passband in the Phase response screens.

The specific filtering that Trinnov is using depends on where the corrections are and what the desired effect is. You have the ability to make the phase response look however you'd like, really (really mess it up if you want).

I hope I'm answering your question, I'm kind of guessing at what you're asking about.

minimum-phase filters? or phase rotations?

Clarify please, and if I can't answer your question, I'll ask Curt.

Dan

Mixed phase, like the Dirac. Trinnov uses both FIR and IIR filters, and you can specify some metrics regarding their usage in the advanced setup menu.

Dirac generates its filters on its own, you don't have any parameters that are changeable about Dirac, just the loudspeaker information.

Dan

Can't really say, I've had earplugs in and high-volume pink noise for the last day and a half. I haven't managed to listen critically yet. Let me get it setup, Dirac is being a pain in my a$$ again- not playing well for some reason.

Back to round 4...

Dan

thanks for the info, but that's not it. This problem has Microsoft written all over it. Restarted Win7 re-plugged the USBPre and security dongle (for the third time) and we're doing OK now.

Just completed measurement 5, 10 more to go.

I wish Dirac had been written to be OS agnostic, since going Mac I have more problems with the Windows stuff than otherwise. My XP stuff works OK though.

Oh well, it works now .... so far ...

report when I'm done

Dan

I use the same, but if you read back early in the thread; I couldn't get Dirac Live to run in my XP VM. I did get it to run in Win7 32 bit.
But it's been tweaky since day one. This software was the reason I had so much trouble with the Datsat at the begining.

At this point it's important to point out that it DOES work in my Mac, just touchy.

Dan

Just finished 17 measurements, optimizing now. Thats 17x12 channels; I started over 2 hours ago.

Dan

OK, Datasat is probably 90% there- maybe 95% if I'm not being so conservative. Dirac went well this afternoon, I had a little scare- all the checkboxes that control impulse response correction were left unchecked. Why might this cause a scare? Well, Dirac doesn't really know what to do when it receives multiple responses per channel, and you end up with a funky looking response curve. So, it's very important that if you're using multiway loudspeakers to tell Dirac "yes, multiple speakers" per channel, and it ignores the impulse response correction= much prettier results.

I've got a couple thing left to tweak , but I'm quite happy with the results. I'll post screenshots again- this time I'll try to window my VM inside MacOS and get the whole Dirac screen captured inside the window, we'll see how it works out.


Dan

OK, never mind on the screenshots, I left the security dongle in the demo theater with the measurement equipment. Sorry, but it's going to have to be tomorrow.

Dan