High levels of audible noise when recording video

itscool · 05-09-2013, 08:17 AM

There is a problem - when recording video appeared background noise in the audio track. Previously, it was not so. Tried to change the firmware, reset the settings - it is useless. What could be wrong?

**Ash** · 05-09-2013, 08:51 AM

Are you referring to a mechanical grinding sound churning at about 5 times a second in the background? If so, it is probably the SR mechanism responsible. Which camera is it? If its a bother to you, switch SR off in video mode and try recording again.

Anvh · 05-09-2013, 08:57 AM

Originally posted by Ash

Which camera is it? If its a bother to you, switch SR off in video mode and try recording again.

Well it's posted inside the K-01 forum

As far as i know the SR on that version is software based so it can't be the SR.

itscool · 05-09-2013, 09:23 AM

This is not the SR. The noise of the other. Also, I tried to disconnect SR. There is no difference.

itscool · 05-09-2013, 09:33 AM

Here's a sample.

MD Optofonik · 05-09-2013, 10:30 AM

I'd like to help but I can find no published audio specs for your camera. It's not even listed on the Pentax site anymore so I can't even ascertain whether or not the camera has a mic/line input. With so little info all I can surmise is that the audio specs are well below most consumer grade standards; it simply sounds like the camera has a very poor s/n ratio. If you have a mic/line input I would suggest taking your camera to a music store and auditioning several mics. Heck even a cheap Sony ECM-MS907 might be better than the on-board mic.

There is a solution if you don't have a mic input on the camera, however. The bad news is, it's not very simple. The good news is, you have total control over your audio quality and can upgrade that quality whenever you like. The other good news is, dual system recording isn't nearly as difficult for consumers to pull off as it was even just a few years ago. The other bad news is, dual system recording isn't very "point and shoot" but with practice you can learn to be quick.

If you're in SoCal you might be able to talk me into a one-on-one all day field recording workshop for a reasonable rate, lunch included of course.

itscool · 05-09-2013, 06:32 PM

Thanks for the detailed answer. But I want to draw your attention to: the noise was not there before. He has recently appeared suddenly. And it's too strong to be "very poor s/n ratio".

MD Optofonik · 05-09-2013, 09:49 PM

Originally posted by itscool

Thanks for the detailed answer. But I want to draw your attention to: the noise was not there before. He has recently appeared suddenly. And it's too strong to be "very poor s/n ratio".

It is, clearly, a signal to noise ratio problem; there's just not enough info to say where the s/n ratio fell apart.

I may regret this but provide detailed info about your capture workflow. Everything.

itscool · 05-13-2013, 04:33 AM

MD Optofonik, thank you for your response

**Mutters** · 05-13-2013, 06:27 AM

I feel It is just bad s/n ratio, picking up ambient sounds.

Check to see you haven't accidentally increased the volume (gain) to full level in the info panel.

The in-camera mics and external mics are controlled independently, btw. You can have the either at any setting and the camera remembers those settings when you plug or unplug.

Also the K-01 shake reduction is done digitally during video recording, so that explains why it made no difference when turned off.

AB

ikehayden · 05-13-2013, 06:48 AM

The audio on the K-01 (for lack of a better word) blows. It is very noisy.... and, of course, more noticeable in quieter situations. We use our K-01s professionally for broadcast purposes, but usually record audio on a separate recorder. I have plugged a wireless mic directly into the K-01 with useful results, but EQ is needed to get rid of the "hiss" created by the camera.

itscool · 05-15-2013, 01:18 AM

Soon I will come another k-01. I'll try to compare. I will write results

Transit · 05-15-2013, 03:21 PM

All the answers miss the point that the OP said it had got a lot worse.

Steve.Ledger · 05-15-2013, 05:14 PM

Originally posted by Anvh

Well it's posted inside the K-01 forum

As far as i know the SR on that version is software based so it can't be the SR.

Are you sure? Because I'm not.
My understanding is that uses the sensor-shift system.
PENTAX site implies this too
Pentax K-01 - Digital Mirrorless - PENTAX Photo

Attachment 172320

**Mutters** · 05-16-2013, 05:48 AM

Originally posted by Transit

All the answers miss the point that the OP said it had got a lot worse.

Well, I did actually ask if he had accidentally turned up the gain, which is a possible explanation for it getting worse.

He didn't answer, so he mustn't have!

AB

05-09-2013, 08:17 AM	#1
itscool New Member Join Date: May 2013 Posts: 12	High levels of audible noise when recording video There is a problem - when recording video appeared background noise in the audio track. Previously, it was not so. Tried to change the firmware, reset the settings - it is useless. What could be wrong?

05-09-2013, 10:30 AM	#6
MD Optofonik Veteran Member Join Date: Feb 2010 Location: California Photos: Gallery \| Albums Posts: 962	I'd like to help but I can find no published audio specs for your camera. It's not even listed on the Pentax site anymore so I can't even ascertain whether or not the camera has a mic/line input. With so little info all I can surmise is that the audio specs are well below most consumer grade standards; it simply sounds like the camera has a very poor s/n ratio. If you have a mic/line input I would suggest taking your camera to a music store and auditioning several mics. Heck even a cheap Sony ECM-MS907 might be better than the on-board mic. There is a solution if you don't have a mic input on the camera, however. The bad news is, it's not very simple. The good news is, you have total control over your audio quality and can upgrade that quality whenever you like. The other good news is, dual system recording isn't nearly as difficult for consumers to pull off as it was even just a few years ago. The other bad news is, dual system recording isn't very "point and shoot" but with practice you can learn to be quick. If you're in SoCal you might be able to talk me into a one-on-one all day field recording workshop for a reasonable rate, lunch included of course. Last edited by MD Optofonik; 05-09-2013 at 11:43 AM.

05-13-2013, 06:27 AM	#10
Mutters Loyal Site Supporter Join Date: Aug 2007 Location: Melbourne, Australia Photos: Albums Posts: 262	Check your gain settings I feel It is just bad s/n ratio, picking up ambient sounds. Check to see you haven't accidentally increased the volume (gain) to full level in the info panel. The in-camera mics and external mics are controlled independently, btw. You can have the either at any setting and the camera remembers those settings when you plug or unplug. Also the K-01 shake reduction is done digitally during video recording, so that explains why it made no difference when turned off. AB

05-15-2013, 05:14 PM	#14
Steve.Ledger Veteran Member Join Date: Oct 2009 Location: Far North Qld Posts: 3,301	Originally posted by Anvh Well it's posted inside the K-01 forum As far as i know the SR on that version is software based so it can't be the SR. Are you sure? Because I'm not. My understanding is that uses the sensor-shift system. PENTAX site implies this too Pentax K-01 - Digital Mirrorless - PENTAX Photo Attachment 172320 Last edited by Steve.Ledger; 10-25-2013 at 06:31 AM.

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05-09-2013, 08:51 AM	#2
Ash Loyal Site Supporter Join Date: Mar 2007 Location: Toowoomba, Queensland Photos: Gallery \| Albums Posts: 23,920	Are you referring to a mechanical grinding sound churning at about 5 times a second in the background? If so, it is probably the SR mechanism responsible. Which camera is it? If its a bother to you, switch SR off in video mode and try recording again.

05-09-2013, 08:57 AM	#3
Anvh Veteran Member Join Date: Sep 2011 Posts: 4,616	Originally posted by Ash Which camera is it? If its a bother to you, switch SR off in video mode and try recording again. Well it's posted inside the K-01 forum As far as i know the SR on that version is software based so it can't be the SR.

05-09-2013, 09:23 AM	#4
itscool New Member Join Date: May 2013 Posts: 12 Original Poster	This is not the SR. The noise of the other. Also, I tried to disconnect SR. There is no difference.

05-09-2013, 09:33 AM	#5
itscool New Member Join Date: May 2013 Posts: 12 Original Poster	Here's a sample.

05-09-2013, 06:32 PM	#7
itscool New Member Join Date: May 2013 Posts: 12 Original Poster	Thanks for the detailed answer. But I want to draw your attention to: the noise was not there before. He has recently appeared suddenly. And it's too strong to be "very poor s/n ratio".

05-09-2013, 09:49 PM	#8
MD Optofonik Veteran Member Join Date: Feb 2010 Location: California Photos: Gallery \| Albums Posts: 962	Originally posted by itscool Thanks for the detailed answer. But I want to draw your attention to: the noise was not there before. He has recently appeared suddenly. And it's too strong to be "very poor s/n ratio". It is, clearly, a signal to noise ratio problem; there's just not enough info to say where the s/n ratio fell apart. I may regret this but provide detailed info about your capture workflow. Everything.

05-13-2013, 04:33 AM	#9
itscool New Member Join Date: May 2013 Posts: 12 Original Poster	MD Optofonik, thank you for your response

05-13-2013, 06:48 AM	#11
ikehayden New Member Join Date: Sep 2010 Location: Liverpool, New York Posts: 14	The audio on the K-01 (for lack of a better word) blows. It is very noisy.... and, of course, more noticeable in quieter situations. We use our K-01s professionally for broadcast purposes, but usually record audio on a separate recorder. I have plugged a wireless mic directly into the K-01 with useful results, but EQ is needed to get rid of the "hiss" created by the camera.

05-15-2013, 01:18 AM	#12
itscool New Member Join Date: May 2013 Posts: 12 Original Poster	Soon I will come another k-01. I'll try to compare. I will write results

05-15-2013, 03:21 PM	#13
Transit Pentaxian Join Date: Aug 2007 Location: Whanganui NZ Photos: Gallery \| Albums Posts: 4,624	All the answers miss the point that the OP said it had got a lot worse.

05-16-2013, 05:48 AM	#15
Mutters Loyal Site Supporter Join Date: Aug 2007 Location: Melbourne, Australia Photos: Albums Posts: 262	Originally posted by Transit All the answers miss the point that the OP said it had got a lot worse. Well, I did actually ask if he had accidentally turned up the gain, which is a possible explanation for it getting worse. He didn't answer, so he mustn't have! AB