I'm getting pops from my speakers every I start an application that uses sound on my Libreboot X60.

7 respuestas [Último envío]
northernarcher
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se unió: 12/24/2014

Like Tox or Rhythmbox. Every damn time. It did not always do that though, it started a little while ago. I'm scratching my head over this. How do I figure out what's happened? Is anyone else having this problem?

Magic Banana

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se unió: 07/24/2010

If it suddenly started, it may be a hardware issue.

tomlukeywood
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se unió: 12/05/2014

i guess a way to tell would be too run another os
like gnewsense or liberty bsd and see if the problem is still there

Magic Banana

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I am a translator!

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se unió: 07/24/2010

Even simpler: the Trisquel live system (the one used to install) can be used.

northernarcher
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se unió: 12/24/2014

I'll try this and come back!

amenex
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se unió: 01/03/2015

Chances are that there is a DC offset in the amp that drives the speakers, so that the speaker coils get yanked one way or the other when the amp gets turned on. In the old days there was a zero offset pot. Nowadays one thing to try is to repeatedly plug 'em in and out to clean up the dirty contacts. If the speakers are accessible, a high pass filter network could be used - a non-polarized capacitor and a resistor to ground on each speaker so no DC can pass through the coils.

northernarcher
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se unió: 12/24/2014

I...can't even pretend to know how to do that.

marioxcc
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se unió: 08/13/2014

If there is a DC offset, then a capacitor won't remove the “pops”: there will be a transient when the DC voltage is applied, and so a corresponding “pop”. Also, as you mentioned (roughly), the capacitors work as an high pass filter, that means they will color the audio (or “distort” in layman terms) and in addition, make everything somewhat less loud.

In other words, following that advice will not remove the pops but it will degrade the audio quality.

>Nowadays one thing to try is to repeatedly plug 'em in and out to clean up the dirty contacts.

I don't recommend this to clean the contacts unless the jack (female connector) is dirty or very oxidized or sulfated, as it will also make the connection looser. Otherwise, use a pencil track eraser or ink eraser to clean the jack instead if it's very dirty, oxidized or sulfated.

Remember that there is a metallic coating that prevents or slows corrosion, so don't use rougher materials like sandpaper or steel “wool”.

Anyway, cleaning the contacts will not make the pops go away, so don't waste your time on that unless there is another reason to clean them.