Film-Tech Forum ARCHIVE: Crackling Sound From Speakers.

This is topic Crackling Sound From Speakers. in forum Digital Cinema Forum at Film-Tech Forum ARCHIVE.

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Posted by Heather Gibson (Member # 10903) on 08-31-2019, 01:26 AM:

Hello Friends,

I am getting crackling noise from my speakers. What could be the reason behind it? Any thoughts or idea?

Posted by Frank Cox (Member # 6258) on 08-31-2019, 01:55 AM:

What speakers? What amplifiers? Every speaker in the auditorium or just one speaker or just one (or two) channels? Continuous crackling? Only when playing a movie? Only when playing non-sync material? Loud crackling that drowns out the desired sound, or you can barely hear the crackling when it's quiet in the auditorium? Just started? Only at certain times of the day or always?

Etc.

Posted by Marcel Birgelen (Member # 6801) on 08-31-2019, 11:06 AM:

Besides a somewhat more refined problem description, it might also help to give some insight in the equipment you're using, like server/projector combination, audio processor, amps and speakers.

Posted by Mark Gulbrandsen (Member # 72) on 08-31-2019, 11:10 AM:

Photos of the crackling would also help... [Wink]

Posted by Heather Gibson (Member # 10903) on 09-02-2019, 07:20 AM:

It seems it was basically an OS issue and not directly related to the sound Hardware. Thanks a lot guys.

Posted by Marco Giustini (Member # 4544) on 09-02-2019, 08:17 AM:

Heather

I would not expect to receive any technical support from this forum if you don’t take some time to give users some details and, even most importantly, if you cant be bothered to give us more details on what the solution was.

Posted by Carsten Kurz (Member # 5396) on 09-02-2019, 10:24 AM:

Maybe Heather isn't even related to an actual cinema and only experienced the crackling on her personal computer setup only? I wouldn't know why anyone would register on film-tech to solve such issues, but maybe she googled 'crackling sound' and somehow found this forum...

- Carsten

Posted by Mike Blakesley (Member # 26) on 09-02-2019, 01:36 PM:

She might be "off the grid" for the holiday weekend.

Posted by James Westbrook (Member # 3690) on 09-02-2019, 03:59 PM:

A lot of our current jobs involve IT these days. Some of us who maintain the projection equipment also have to maintain the manager computers in the offices which are Windows 10. However Windows problems are better solved on other sites than this one.
This does remind me of an odd "woosh woosh" noise that was heard on playback on the original Lego Movie which I resolved by simply rebooting the Doremi Showvault.

Posted by Jarod Reddig (Member # 6363) on 09-02-2019, 05:11 PM:

Probably the most vague question ive ever seen asked around these parts. It definitely helps to include as much info as possible.

Posted by Allen Arin (Member # 10988) on 09-03-2019, 12:39 AM:

The crackling sound is mostly caused by having problem in connection,someplace between your amplifier and your speaker driver,causing interference.Connection can be bad in many places addressing the issue is very irritating and it sometimes easy to find or sometimes hard.

Posted by Mike Blakesley (Member # 26) on 09-03-2019, 12:09 PM:

Uh, not necessarily.... a crackle can be caused by any number of things. That's why people are asking for more information.

Posted by Mark Gulbrandsen (Member # 72) on 09-05-2019, 07:54 AM:

Could be caused by:

Bad content audio
Bad AES connection
Problem in the Server
Problem in the Audio Processor and or crossover
Improper room equalization
Bad amplifier channel
Bad driver, either high frequency or low frequency (Or mid if applicable)
Bad wiring in the system on the channel thats crackling.

I probably left out ten other things. But the above are the most common I have run into over the years.

Posted by Carsten Kurz (Member # 5396) on 09-05-2019, 08:06 AM:

A bag of chips on a rear seat.

Posted by Mark Gulbrandsen (Member # 72) on 09-05-2019, 11:17 AM:

quote: Carsten Kurz
A bag of chips on a rear seat.

Posted by Terry Monohan (Member # 8285) on 09-05-2019, 11:43 AM:

The speaker cones may be cracked from forced high end bass?

Posted by Mark Gulbrandsen (Member # 72) on 09-05-2019, 12:10 PM:

Not to mention the crumbling plaster and cracking concrete from all that bass... [uhoh]

Posted by Marcel Birgelen (Member # 6801) on 09-05-2019, 12:48 PM:

If you just attended a 4DX show it might also be water in your ear(s).