Crackling/odd sounds
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    Crackling/odd sounds

    Hi,

    I'm new to this forum.. and to fedora too. I recently installed Fedora 28.
    I've a problem with audio. There is (sometime... not always) a crackling sound during the system startup and when the system reproduces a system notification sound.
    For example, if I keep pressed the backspace key when the text field is already empty, the system initially emit a crackling sound and then the sound is emitted normally.
    The same crackling sound is emitted during the system startup... at very early stage of the startup phase.

    I'm new (also) to linux in general, so if you want information about my system, please say to me what command i have to execute to obtain these information.

    Thanks in advance.

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    Re: Crackling/odd sounds

    Welcome to the forum and fedora.

    I am far from being any kind of expert on audio/sound issues, but something learned from past experience is that crackling/popping sounds can sometimes be caused by too high of a level on either the "mic" or "line" channels, and especially if those channels have a "boost" function with is active and engaged.

    From a terminal you can see what sound device(s) you have with the command:
    Code:
    $ cat /proc/asound/cards
    They will be numbered, beginning with 0 (zero), which will usually be your primary sound device. To view and set levels of the channels, you can use alsamixer.
    Code:
    $ alsamixer -c0
    The "-c0" in the above command means use "card 0". See "man alsamixer" to review the keys to control alsamixer, or hit the "h" key for the help screen. ESC key to close the help screen. Look especially for any mic or line listing that might be active and have a high level set and especially still any "boost" entries that might be active and set.

    This may or may not help fix your issue. Either way, it's information you want to know/learn in any event. Another command to dump your sound card setting to the terminal:
    Code:
    $ amixer -c0 scontents

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    Re: Crackling/odd sounds

    I have found that installing "pavucontrol", and playing with the configuration tab fixes a lot of problems.
    "monsters John ... monsters from the ID..."
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