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I observe noise which shows up periodically (every 5 seconds or so) when i use Asio sound card with the custom built audio processing application visualisation tab which displays the frequency analysis. The noise is not observed when using a Direct Sound card with the same audio.

I have tried changing the number of channels that are listening to the audio for Asio from 8 to 2 but that doesn't fix the issue! The sampling rate is 48kHz.( Tweaked it to 44kHz, doesn't fix the issue).

The audio processing application is written in C# and made use of NAudio API. I've included the images for the waveform in the link:

https://www.sendbig.com/view-files?Id=8fe0ff05-d27e-9ec2-161f-415d923599b7 The first image is the clean signal with no noise and the next image shows the audio along with the noise. Any inputs on this is appreciated!

Artemis
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  • How does the noise look like? Waveform plot, spectrum plot etc – Jon Nordby Jan 18 '22 at 15:32
  • @Jon Nordby I've added two images of the waveform. 1st image is of the clean signal (380Hz) with no noise. The 2nd image represents the audio signal along with the noise. I cannot attach images in the question since i do not have enough credits here. So, here's the link to the images : https://www.sendbig.com/view-files?Id=8fe0ff05-d27e-9ec2-161f-415d923599b7. – Artemis Jan 19 '22 at 12:55

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