Sound Devices PIX240 Input Delay

[Adrian Weinbrecht]

I'm curious, we have and love our Sound Devices PIX240's and we nearly always film with them to serve as a backup and instant Proxy maker. Sometimes because of budgets or time we edit directly from the ProRes422.

For simple interviews we use the Pix to power our mics via 48V, anything more complex we use one of our great sound guys.

In the setup menu we tend to delay the Audio coming in by 48ms, this is to match the time it takes for the Epics to record the signal and output it via SDI into the Pix240.

This delay doesn't seem quite perfect yet, (maybe 98%) does anyone else have a time delay setting they can suggest for the PIX ?

Or to put it another way, how long does it take for a video signal to go through the Red Epics and out of the SDI out.

HAPPY MONDAY TO ALL!

 

[ericyoung]

You could work it out exactly by feeding the same audio feed to both the camera and the PIX, shooting a clapperboard, then compare the audio waveforms of the R3Ds and the corresponding ProRes files and see how far apart they are.

Let us know what you find

 

[Ted Parkes]

I also thought there might be a reference to the delay in the Camera manual.

 

[Adrian Weinbrecht]

Eric, that's a brilliant idea, I'll try and do this in the next couple of days. And post the results.

Ted, I'll look in the manual, thanks, but if I didn't post this question I would have missed the great response from Eric Young.

 

[Ken Willinger]

We did some tests with Red One a couple years ago and got about 167ms. I'm assuning it would be similar with Epic.

 

[Adrian Weinbrecht]

Thanks Ken

surely as the Red one is an older technology (still great though) that more time would have been required to process the signal?

 

[jpmcabe]

I just went through this - 165ms was the delay if feeding the pix direct w sound….

Sdi imbedded was off also- but didn't figure out the exact time for that….


I just picked up an Odyssey so going to have to figure something out w the imbedded audio…..

 

[Adrian Weinbrecht]

Thanks John

165Ms is that with an Epic?

 

[jpmcabe]

yes

Thanks John

165Ms is that with an Epic?

 

[Daniel Murphy]

I believe Sound Devices recommends setting a 167ms delay for PIX240i and EPIC. If 165ms is better I'll happily change.

 

[Ken Willinger]

I've been using 167ms with my Epic. It works.

 

[jpmcabe]

I've been using 167ms with my Epic. It works.

yes- that is what we have been using….. Sorry I thought it was 165…..