Does anyone know an effective way to get a 72 Hz signal out of a mac? Has anyone on here done this successfully?

I'm running a Mac Pro with an NVIDIA GeForce 8800 GT outputting 1920x1080 to my Pioneer Kuro (DVI to HDMI). The card is outputting the default 60 Hz right now, and I'm trying to display 23.976p .mkv files on the Kuro so they're juddering like crazy. The Kuro can display 72 Hz, but only when it detects a 72 Hz signal, and I've never been able to get the comp to output that.

I've tried both SwitchResX and DisplayConfigX with horrible results (those two programs are about as cryptic as they come). Are there any other programs out there that will do this more easily? If not, can anyone give me some pointers on getting this done with one of those two programs?

Thanks!

Wow, sounds like there aren't that many folks doing this.

I guess I'll give DisplayConfigX another try....

And if I'm successful I'll be back to post how I did it! ;)

A couple of friendly corrections:

;14191634'] The Kuro can display 72 Hz, but only when it detects a 72 Hz signal, and I've never been able to get the comp to output that.

Firstly, you would want to send a 1080p signal at 24 Hz, not at 72 Hz. However, this may not be necessary for what you are trying to achieve. When the Kuro's PureCinema setting is set to Advance, the Kuro will detect 24 fps content, regardless of whether it is sent at 24 Hz (in the case of a 1080p/24 signal), or whether it is sent at 60 Hz, and display it with 3:3 pulldown. The Kuro can detect 24 fps content in the following signals: 480i, 480p, 720p, and 1080i (not 1080p/60). On slow plans you're still going to see (a) low-frame rate judder inherent in the 24 fps source, and (b) strobing artifacts, but you shouldn't see any telecine judder. Unfortunately, the strobing artifacts can be just as annoying as the telecine judder.

A couple of friendly corrections:



Firstly, you would want to send a 1080p signal at 24 Hz, not at 72 Hz. However, this may not be necessary for what you are trying to achieve. When the Kuro's PureCinema setting is set to Advance, the Kuro will detect 24 fps content, regardless of whether it is sent at 24 Hz (in the case of a 1080p/24 signal), or whether it is sent at 60 Hz, and display it with 3:3 pulldown. The Kuro can detect 24 fps content in the following signals: 480i, 480p, 720p, and 1080i (not 1080p/60). On slow plans you're still going to see (a) low-frame rate judder inherent in the 24 fps source, and (b) strobing artifacts, but you shouldn't see any telecine judder. Unfortunately, the strobing artifacts can be just as annoying as the telecine judder.

Thanks for the reply. That's interesting about the Kuro's ability to detect a 24 frame cadence inside a 1080i signal. I didn't realize that. I'll see if I can get my comp to output a 1080 interlaced signal and see if the Kuro will accept it. I'm not sure if it will work, as that will only be part of the equation - I'll still need to get the software to add a 3:2 cadence to the signal which I'm not sure I can get VLC to do. I'll give it a shot though. Thanks again!

;14233622']Thanks for the reply. That's interesting about the Kuro's ability to detect a 24 frame cadence inside a 1080i signal. I didn't realize that. I'll see if I can get my comp to output a 1080 interlaced signal and see if the Kuro will accept it. I'm not sure if it will work, as that will only be part of the equation - I'll still need to get the software to add a 3:2 cadence to the signal which I'm not sure I can get VLC to do. I'll give it a shot though. Thanks again!

I was able to send 1080p/24 from a MacBook Pro with a little tinkering. Once you get that working, you won't need to add the cadence since the panel will detect the frame rate and adjust accordingly.

I was able to send 1080p/24 from a MacBook Pro with a little tinkering. Once you get that working, you won't need to add the cadence since the panel will detect the frame rate and adjust accordingly.

Thanks. I'll give the 24 Hz a try as well. Do you mind if I ask, did use third party software like SwitchResX or DisplayConfigX to achieve 24 Hz?

;14237676']Thanks. I'll give the 24 Hz a try as well. Do you mind if I ask, did use third party software like SwitchResX or DisplayConfigX to achieve 24 Hz?

Yes, I am pretty sure I used DisplayConfigX. I do remember that "1920 x 1080 (Interlaced)" showed up twice in the display preferences, but that one of them was, in fact, 1920 x 1080 progressive.