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USB Microphone Internal Noise?
zerowalker
post Aug 10 2012, 17:53
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I got a Samson C03U, and i am happy with it and all, except for one thing.
I here a low noise from it, anditīs there even if i Mute the microphone, so i am thinking itīs either the driver or the DAC or something?

Anyone know if it can be fixed or if i have to live with it:)?
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mixminus1
post Aug 10 2012, 18:53
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What kind of noise - a steady-state hiss, or buzz/hum?

If you can record a short (5-10 sec.) WAV of it, you could post it to the Uploads forum so others could take a listen to it.


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zerowalker
post Aug 10 2012, 18:58
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QUOTE (mixminus1 @ Aug 10 2012, 19:53) *
What kind of noise - a steady-state hiss, or buzz/hum?

If you can record a short (5-10 sec.) WAV of it, you could post it to the Uploads forum so others could take a listen to it.


Oh so thatīs why i couldnīt upload;S

Can a Admin please move this to the Upload forum?

EDIT:

I have posted in the Upload forum now.

This post has been edited by zerowalker: Aug 10 2012, 19:14
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zerowalker
post Aug 10 2012, 19:12
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Please merge this with my other post in Audio Hardware!


Here is the noise, itīs a Hiss noise.

The recording is from me muting and unmuting.
Attached File(s)
Attached File  Noise.flac ( 371.24K ) Number of downloads: 115
 
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mixminus1
post Aug 10 2012, 20:03
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Sounds like it's just the noise floor of the mic preamp, and considering the price, not too bad, especially since it's a "clean" noise floor with no hum or buzz.


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zerowalker
post Aug 10 2012, 20:33
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QUOTE (mixminus1 @ Aug 10 2012, 21:03) *
Sounds like it's just the noise floor of the mic preamp, and considering the price, not too bad, especially since it's a "clean" noise floor with no hum or buzz.


Yeah but my USB Webcam doesnīt have that noise, why?
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Arnold B. Kruege...
post Aug 11 2012, 10:40
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QUOTE (zerowalker @ Aug 10 2012, 15:33) *
QUOTE (mixminus1 @ Aug 10 2012, 21:03) *
Sounds like it's just the noise floor of the mic preamp, and considering the price, not too bad, especially since it's a "clean" noise floor with no hum or buzz.


Yeah but my USB Webcam doesnīt have that noise, why?


Different mic and preamp?

Sample rate so low that hiss is cut out?
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Arnold B. Kruege...
post Aug 11 2012, 10:45
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QUOTE (zerowalker @ Aug 10 2012, 14:12) *
Please merge this with my other post in Audio Hardware!


Here is the noise, itīs a Hiss noise.

The recording is from me muting and unmuting.



How much is acoustical noise?

To test for acoustical noise, put the mic in the quietest place you can.
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zerowalker
post Aug 11 2012, 14:48
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Well i canīt see that the preamp in that mic is better, that would just be weird.
And samplerate, i am not sure, but if itīs hardware hertz we are talking about it may very well be true that it doensnīt do well, maybe 15khz (i donīt know anything about this stuff though, only learned recently that 44.1khz sample rate is pretty much 22khz in audio frequency.)
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mixminus1
post Aug 11 2012, 17:01
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There's a good chance that the webcam employs a combination of noise reduction and gating as it is designed for communication applications and not recording.

Since the Samsung is a one-box product - microphone, preamp, ADC, and USB audio interface all in one chassis, and most likely all on one circuit board - there's really nothing you can do except get a different microphone/recording interface if you're dissatisfied with it's noise performance.

This is a very good reason to not go the all-in-one route in the first place. smile.gif


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zerowalker
post Aug 11 2012, 17:46
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QUOTE (mixminus1 @ Aug 11 2012, 18:01) *
There's a good chance that the webcam employs a combination of noise reduction and gating as it is designed for communication applications and not recording.

Since the Samsung is a one-box product - microphone, preamp, ADC, and USB audio interface all in one chassis, and most likely all on one circuit board - there's really nothing you can do except get a different microphone/recording interface if you're dissatisfied with it's noise performance.

This is a very good reason to not go the all-in-one route in the first place. smile.gif



Ah i see, well i know itīs not a High Tech mic, but itīs far superior to "normal" mics.

Later i will probably buy a top microphone and external amp and such things, but not in the near future;D
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Arnold B. Kruege...
post Aug 12 2012, 12:45
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QUOTE (mixminus1 @ Aug 11 2012, 12:01) *
There's a good chance that the webcam employs a combination of noise reduction and gating as it is designed for communication applications and not recording.

Since the Samsung is a one-box product - microphone, preamp, ADC, and USB audio interface all in one chassis, and most likely all on one circuit board - there's really nothing you can do except get a different microphone/recording interface if you're dissatisfied with it's noise performance.

This is a very good reason to not go the all-in-one route in the first place. smile.gif



Minor correction - the product is a Samson (low end pro audio supplier) not a Samsung.

If memory serves, the CO3 is a dual-capsule multi-pattern version of the C01 (I own two copies of the C01) . It's neither worse nor better than most other pro mics on the hiss front.

Often hiss in products like this is due to problems with gain staging - there are several gain controls in the path, and you can get the same end result various ways. The usual best approach is to run the gains early in the chain as high as is reasonably possible without clipping, and loose any excess gain as close to the end as possible.
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