Topic: 722 noise?

[nickgregory]

yup, cell phone

[terrapinj]

damnit, i was hoping the 460s>722 would be protected from cell phone interference...

[ts]

That's what I thought. I think it was someone at the board. Wasn't me. Anyway of getting rid of it in post?

[ts]

thats just ratdog.

 

[wbrisette]

That's RF / Cellphone as folks mentioned. Ask any sound mixer in LA what they dislike most about the 7xx series recorders and the first thing they all mention is how susceptible they are to RF. That's why there is a big issue with the wireless mics and the 744 on the set. Most TV and film crews have moved to wireless mics and the RF interference with the 744 is horrible.

Maybe a lead lined bag will help in the future. 

Wayne

[thegreatgumbino]

So how common is RF with the 722?  Is everyone with a 722 on the board having issues?

[thegreatgumbino]

Good to know.  Thanks, Moke!  I've been toying with the idea of selling the V3 and grabbing a 722, but this thread worried me.  +T

[terrapinj]

i've never had any issues either (knock on wood) and I have sent/received text messages while standing right next my rig thinking the 722 wasn't succeptable to cell phone interference. i'm a little worried now  that sample was clearly cell phone 

[WiFiJeff]

I have also taped about twenty concerts this year with my 722, lots of cell phones in the room often ringing at inopportune moments where the audio ring was hard to edit out, but have never experienced any of the weird noise referenced above. 

Jeff

[ghellquist]

Ask any sound mixer in LA what they dislike most about the 7xx series recorders and the first thing they all mention is how susceptible they are to RF. That's why there is a big issue with the wireless mics and the 744 on the set. Most TV and film crews have moved to wireless mics and the RF interference with the 744 is horrible.

Now, I don´t spend much time aroung the sound mixers in LA, in fact I´ve never been in that town. But I was under the impression that the problem with 744 and radio mics was not that the 744 was effected, but instead that it can produce radio interference that disturbs the radio receiver, quite the other way round. Is this what you have heard as well?

As for my experience, I have had zero issues with cell phone interference with my 722.

Gunnar

[ts]

Could it have been my phone. It was on but not in use. I had my bag on top of the seat directly behind me and my phone was in my back pocket, which would have put it inches away from the 722. But no calls were made to me that night.

[kgreener]

fwiw this sound is similar to what i hear when my Blackberry is too close to my computer speakers, or when i'm in my car with my JB3 serving as an mp3 player via the car stereo.

http://taperssection.com/index.php?topic=67991.msg911085#msg911085

i don't think these pda's, cellphones, etc are discriminate of the recording device, i.e. i don't think it's the 722's fault, this seems to be happening on all kinds of recording devices (MT's, Marantz, JB3's, etc) and it's just happening more & more each day.

[ts]

My wife says she did call me during RD's set to see if SCI was getting close. So I'm assuming thats what did it. No noise during SCI. An awesome set to. Shine on You Crazy Diamond for Sid. Here's my SCI torrent: http://bt.etree.org/details.php?id=27278.

[it-goes-to-eleven]

Knock on wood, no 722 issues for me.  Not all cellphones are equal.  The blackberry and nextel seem to be the worst in the US due to the frequencies used.

FWIW, they were selling metal mesh bags pre 9-11 that you'd put your bag into and lock when flying. The idea is that the metal mesh secures otherwise unlockable bags.  Maybe the mesh could be incorporated into a faraday cage for a bag?

I don't think anyone here has tested whether quad cables reject the noise better (or even sound better/worse) than non-quad but we have discussed it. I know that some of the teflon-silver cables are not quad, fwiw.

[(((KB)))]

Just curious, what mic cables are you using?

-K