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General Questions • Re: [Software] 60 Cycle Hum From Inactive Sound Card

I thank you for your effort and I really thought you might have struck on a solution, but after trying to make it work for several hours, I am not sure I will ever make it work with this approach.

There are basically two problems. The first one is that you have to kill the 0 Hz output before you go with new process to produce a tone. If you don’t, they are both running at the same time and you end up with a unpleasant garbled tone, not a pure sine wave. I finally came up with a way of doing that, but it created a new problem. I am not sure if there is a lag in killing the first process so there is overlap or lag in starting the next one so there is gap, but regardless, there is quite a bit of noise at the transition. You might think of it as a “click” but it is really much louder and lasts a little longer than what you might associate with the term click. It is certainly not something you would want to live with.

I have also spent hours trying to get pulseaudio to work and I have managed to keep it from suspending and have even found a way to make it work from the console when logged in a root, but I cannot find a way for it to do what I want unless a user is logged in.

Why pulseaudio has been designed to only allow logged in non root users to use it without a lot of mickey mouse tweaking is beyond me. If it is for security, all I can say is “Lord, protect me from those who would protect me from myself!”

At the moment I am trying to work with only alsa, but no matter what I do the hum starts again after the sound generating script ends. With pulseudio there are .pa files etc that you can modify to prevent suspension, but I have yet to find a way to do so using only alsa.

On the old server I use to use “beep”, but it no longer works on some of the newer motherboards and my Gigabyte Z790 appears to be one of them.

I never thought I would say this, but sound is one area Windows is handling things much better than Linux. Image may be NSFW.
Clik here to view.
:(

Statistics: Posted by dhunt2206 — 2024-02-26 15:20



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