<![CDATA[audio usb record and play with strange background noise]]>Hi all

I made the following test using two different Omega2 Pro:

  • Installed the Alsa packages
  • Connect a usb headset with microphone
  • Record my voice using different frequencies. I used from 8kHz to 44Khz (arecord command)
  • Play the wav generated files of the previous step (aplay command)

In both omegas I obtained the same result: a strange background noise. The noise is regular.

The same headset has been tested in another linux machine without any problem. It's quite a good headset.

Any suggestion?

Thank you

]]>http://community.onion.io/topic/5021/audio-usb-record-and-play-with-strange-background-noiseRSS for NodeSat, 13 Jun 2026 21:50:36 GMTFri, 03 Nov 2023 00:01:22 GMT60<![CDATA[Reply to audio usb record and play with strange background noise on Fri, 03 Nov 2023 00:01:22 GMT]]>Hi all

I made the following test using two different Omega2 Pro:

  • Installed the Alsa packages
  • Connect a usb headset with microphone
  • Record my voice using different frequencies. I used from 8kHz to 44Khz (arecord command)
  • Play the wav generated files of the previous step (aplay command)

In both omegas I obtained the same result: a strange background noise. The noise is regular.

The same headset has been tested in another linux machine without any problem. It's quite a good headset.

Any suggestion?

Thank you

]]>http://community.onion.io/post/25682http://community.onion.io/post/25682Fri, 03 Nov 2023 00:01:22 GMT<![CDATA[Reply to audio usb record and play with strange background noise on Fri, 03 Nov 2023 13:55:00 GMT]]>@Joan-Iglesias If you play the wav on some other device, such as a computer, is the background noise present? I think it is important to understand if the background noise is in the recording or the playback.

]]>http://community.onion.io/post/25683http://community.onion.io/post/25683Fri, 03 Nov 2023 13:55:00 GMT<![CDATA[Reply to audio usb record and play with strange background noise on Fri, 03 Nov 2023 18:19:29 GMT]]>@crispyoz If I do the same in my Linux computer everything works fine. When I do the mentioned steps in Omega, it appears this strange background noise.

Thank you

]]>http://community.onion.io/post/25684http://community.onion.io/post/25684Fri, 03 Nov 2023 18:19:29 GMT<![CDATA[Reply to audio usb record and play with strange background noise on Sat, 04 Nov 2023 06:21:26 GMT]]>@Joan-Iglesias My question was, if you record the audio on the Omega, then transfer the wav file to your linux computer and play it on your liux computer, does the recording have the background noise?

]]>http://community.onion.io/post/25685http://community.onion.io/post/25685Sat, 04 Nov 2023 06:21:26 GMT<![CDATA[Reply to audio usb record and play with strange background noise on Sun, 05 Nov 2023 22:59:54 GMT]]>@crispyoz Yes, it has it.

]]>http://community.onion.io/post/25686http://community.onion.io/post/25686Sun, 05 Nov 2023 22:59:54 GMT<![CDATA[Reply to audio usb record and play with strange background noise on Sun, 05 Nov 2023 23:12:09 GMT]]>@crispyoz I would like to add more information. I'm using a mono headset with microphone.

The headset has USB connector, that I directly connect to the USB of the Omega 2 Pro.

I could see in the forum, that some users have used a USB sound card. The USB sound card, probably had a jack 3.5 for audio input and output.

Maybe using a USB sound card the background noise could disappear. What do you think?

]]>http://community.onion.io/post/25687http://community.onion.io/post/25687Sun, 05 Nov 2023 23:12:09 GMT<![CDATA[Reply to audio usb record and play with strange background noise on Mon, 06 Nov 2023 08:17:15 GMT]]>@Joan-Iglesias I suspect the issue is power related, but I may be wrong. If you connect your USB headset and microphone to a powered USB hub which is also connected to your Omega, this could help determine if this is the issue.

How are you powering your Omega?

]]>http://community.onion.io/post/25688http://community.onion.io/post/25688Mon, 06 Nov 2023 08:17:15 GMT<![CDATA[Reply to audio usb record and play with strange background noise on Mon, 06 Nov 2023 10:24:16 GMT]]>@crispyoz I'm powering the Omega with a USB cable connected to my Linux PC.

]]>http://community.onion.io/post/25689http://community.onion.io/post/25689Mon, 06 Nov 2023 10:24:16 GMT<![CDATA[Reply to audio usb record and play with strange background noise on Mon, 06 Nov 2023 11:03:17 GMT]]>@Joan-Iglesias do you have powered USB hub to try? Or external power supply for Omega?

]]>http://community.onion.io/post/25690http://community.onion.io/post/25690Mon, 06 Nov 2023 11:03:17 GMT<![CDATA[Reply to audio usb record and play with strange background noise on Mon, 06 Nov 2023 16:21:38 GMT]]>@crispyoz I powered the Omega 2 Pro with a power supply (not PC), but still the same problem. If I can, I will get a usb sound card, to check if the problem disappear.

]]>http://community.onion.io/post/25692http://community.onion.io/post/25692Mon, 06 Nov 2023 16:21:38 GMT<![CDATA[Reply to audio usb record and play with strange background noise on Wed, 08 Nov 2023 16:08:07 GMT]]>@crispyoz More information: when audio is recorded in PC and played in Omega, it works fine. When audio is recorded using Omega and played in PC: background noise appear.

]]>http://community.onion.io/post/25693http://community.onion.io/post/25693Wed, 08 Nov 2023 16:08:07 GMT<![CDATA[Reply to audio usb record and play with strange background noise on Thu, 09 Nov 2023 10:20:00 GMT]]>Tested with a jack 3.5 to USB adapter + headset with microphone and jack 3.5 connection: it works much better. Some background noise can be listened, but nothing very important.

I suppose, with the right headset, sound would be event much better.

]]>http://community.onion.io/post/25694http://community.onion.io/post/25694Thu, 09 Nov 2023 10:20:00 GMT