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On Thu, Nov 3, 2011 at 2:44 PM, Alan Mackenzie <acm@×××.de> wrote: |
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> Hi, Alex |
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> On Thu, Nov 03, 2011 at 07:16:53PM +0100, Alex Schuster wrote: |
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>> The ONE in alsamixer? I have at least PCM, Front and CD, another PC |
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>> also has Master. Are you missing some of those? Is a channel muted (you |
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>> see 'MM' inmstead of a volume, use the M key to unmute)? Maybe you have |
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>> to scroll with the right arrow key to see those channels? |
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> |
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> Ah, that was the problem. There are four effective volume controls in |
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> alsamixer: master, PCM, front, and side. They seem to multply together |
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> (each in the range 0 to 1). My "side" was only at ~30/100, the others |
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> being around 80. |
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> |
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> Now they're all set to 93/100, and the volume control on the speakers |
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> works sensibly. |
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> |
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> Why "side"? |
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|
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Support for, e.g. 5.1 channel surround sound. |
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|
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> What is "PCM"? |
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|
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Pulse Code Modulation. A method of encoding audio data digitally. In |
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ALSA, this usually refers to applications' feeding audio data in via |
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purely-software means. (As opposed to via a sound card's onboard |
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input) |
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|
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-- |
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:wq |
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