A few points I learned that hopefully would help other owners in Theta Casablanca IVa setup. These points are supplements to the Theta's manuals, in particular the Dirac "red manual," so you still must RTFM
. In the red manual, there is a summary page of the whole process - I referred to this page repeatedly, while reading the other manuals. It's a relatively simple process and will make a lot more sense once you are next to machine and know the little idiosyncrasies. Thanks to John B, Jeff, Steve B., etc. and all who have helped.
1. Play a 2 channel music CD
during spl level setup and Dirac setup. For level setup, it could be HDMI, but for Dirac setup it must be through Toslink, NOT HDMI
. I red bold face this because this alone has caused me most of my problems with Dirac. The manual mentions "play a CD," but does not note that you have to connect with Toslink, and not HDMI. It's also a good idea to have the CD player plays in infinite repeat
, because during the process if the CD stops at the end, the setup process will stop working.
***What happens if you use HDMI for Dirac: the top ceiling speakers stay silent during the Dirac process. I found out the hard way.
***What happens if you don't use infinite repeat in playing the CD: if you are slow (and I was at first), the CD stops at the end and the setup shows communication failure IIRC.
***Since the music, from said "CD playing music connected through Toslink," is playing, how could you set up mic gain and start any measurement? When you are ready to set up the mic gain, click on the little arrow/play button
of the left front channel, the music would then mute so you could start calibrating and measuring.
Must STOP the CD
the Dirac file to Theta, or uploading will fail. In other words, during the Dirac process, you first play the CD in infinite repeat, but after "Optimization" and before exporting the filter to Casablanca, you MUST stop the CD. Must.
Before Dirac measurement step, take one last look to see that the subwoofer channel is checked
as "subwoofer." This may get de-selected as you move back and forth. AFAIK
this is important to the process.
This is in the manual but bear repeating: What you want to select on first page of Dirac setup is: Custom, 12 speakers, Theta Casablanca with 4 heights. Then hit RESCAN button. **IF** when you get to the mic setup page, the first time around, only Left and Right channel show. You then have to enter the other 8 channels manually
and then, go back to the first page and click re-scan. It is this re-scan step that seems to have caused the subwoofer check mark to be de-selected in 3 above.
As Steve has mentioned: Before
Dirac setup, you turn off all crossovers
, meaning run all speakers full range. John Baloff at Theta has found that sofa better measures room characteristics and works/sounds better so you probably want to use the Sofa
(not Chair) pattern for microphone placements. Once you have done Dirac, go back and turn on the crossover, *then* you reset speaker levels.
There is a Save Project button that John B would use after a. Measurement (labeled as such), b. Target, and c. Optimization. There is also a "Save Target" button that you could use to save the Target curves.
IMHO, don't even think about doing this during day time. The mic is extremely sensitive and picks up noise from far away truck, airplane, bath room fan, water sprinkler, and even boat, etc., etc. I live in a relatively quiet area and still was so frustrated at times.
If Dirac program doesn't recognize Theta: cycle Theta on/off using the power switch in the back, NOT the front. These are the steps I have tried successfully to get Casablanca to appear and be recognized by Dirac program:
a. Power off Casablanca with button in the back
, close and restart Dirac software on your computer.
b. Close and restart Dirac software on your computer, without turning Casablanca off.
c. "Rescan" on first tab of Dirac software.
is the safest method of making sure every thing is working. Powering off Casablanca using front button did not help at any given time.
Once Dirac is loaded, remember to turn on Crossover settings, and then REPEAT speaker level adjustment
. Speaker level settings are likely to be DIFFERENT with Dirac on versus Dirac off. For this reason I actually have 2 different Inputs: Input 1 with speaker levels appropriate for Dirac on, and Input 2 with speaker levels appropriate for Dirac off, etc.