5D Audio Inputs at DVinfo.net

Bill Hamell · March 23rd, 2011, 04:07 PM

I'm guessing they are unbalanced can anyone confirm this?

Jon Fairhurst · March 23rd, 2011, 04:50 PM

Yes. It's a stereo 1/8" TRS minijack.

If you want balanced inputs, I recommend a juicedLink preamp and Magic Lantern...

http://www.dvinfo.net/forum/canon-eo...-complete.html

Bill Hamell · March 23rd, 2011, 05:57 PM

Thanks Jon, I have read that post. By turning down the audio almost all the way down and feeding it with my field mixer I am getting results equal to the JuicedLink and ML. If I did not already have the field mixer I would go in that direction.

Jon Fairhurst · March 23rd, 2011, 06:08 PM

ML can give you even cleaner results.

The analog gain in the Canon manual audio gain firmware is fixed at +31dB. All adjustments are made digitally in the Canon code. Magic Lantern lets you set analog and digital gains separately. I typically run +10dB or +17dB in analog and 0dB in digital. From memory, this reduced noise by another 12 or 18 dB compared to the Canon code. I'd have to look at my notebook to be sure...

This assumes that you can crank the gain cleanly out of your field mixer. If so (and if the unbalanced run from the mixer to the camera isn't so long that it picks up interference), you're golden!

Bill Hamell · March 24th, 2011, 06:59 AM

Thanks, Jon not related however I picked up an AC hum probably from the cheap wall wart. :( Not from the unbalenced connection, everything is unpluged except the AC line.

March 23rd, 2011, 04:07 PM	#1
Bill Hamell Major Player Join Date: Aug 2004 Location: Mystic Ct. Posts: 477	5D Audio Inputs I'm guessing they are unbalanced can anyone confirm this? __________________ Cinematographers Bring Shadow To Light

March 23rd, 2011, 04:50 PM	#2
Jon Fairhurst Inner Circle Join Date: May 2006 Location: Camas, WA, USA Posts: 5,513	Re: 5D Audio Inputs Yes. It's a stereo 1/8" TRS minijack. If you want balanced inputs, I recommend a juicedLink preamp and Magic Lantern... http://www.dvinfo.net/forum/canon-eo...-complete.html __________________ Jon Fairhurst

March 23rd, 2011, 05:57 PM	#3
Bill Hamell Major Player Join Date: Aug 2004 Location: Mystic Ct. Posts: 477	Re: 5D Audio Inputs Thanks Jon, I have read that post. By turning down the audio almost all the way down and feeding it with my field mixer I am getting results equal to the JuicedLink and ML. If I did not already have the field mixer I would go in that direction. __________________ Cinematographers Bring Shadow To Light

March 23rd, 2011, 06:08 PM	#4
Jon Fairhurst Inner Circle Join Date: May 2006 Location: Camas, WA, USA Posts: 5,513	Re: 5D Audio Inputs ML can give you even cleaner results. The analog gain in the Canon manual audio gain firmware is fixed at +31dB. All adjustments are made digitally in the Canon code. Magic Lantern lets you set analog and digital gains separately. I typically run +10dB or +17dB in analog and 0dB in digital. From memory, this reduced noise by another 12 or 18 dB compared to the Canon code. I'd have to look at my notebook to be sure... This assumes that you can crank the gain cleanly out of your field mixer. If so (and if the unbalanced run from the mixer to the camera isn't so long that it picks up interference), you're golden! __________________ Jon Fairhurst

March 24th, 2011, 06:59 AM	#5
Bill Hamell Major Player Join Date: Aug 2004 Location: Mystic Ct. Posts: 477	Re: 5D Audio Inputs Thanks, Jon not related however I picked up an AC hum probably from the cheap wall wart. :( Not from the unbalenced connection, everything is unpluged except the AC line. __________________ Cinematographers Bring Shadow To Light