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Duncan wrote: |
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> "Mark Haney" <mhaney@××××××××××××.org> posted |
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> 47FDFD4E.1050301@××××××××××××.org, excerpted below, on Thu, 10 Apr 2008 |
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> 07:43:10 -0400: |
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> |
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> OK, simple stuff first. |
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> |
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> If you hadn't changed the kernel or alsa about the time it happened... |
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> you mentioned the sound card was still right and the volume was up, but |
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> didn't mention whether you checked the mute. |
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> |
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> Also, check any switches. On some cards, switching the digital sound on |
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> switches analog sound off and the reverse. There may also be a toggle |
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> switch for the on-card amplifier. |
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> |
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> You don't mention your setup. Here for instance the computer output is |
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> to a regular home audio system channel input. If your system is similar, |
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> check that the system in question still plays the radio or other input, |
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> IOW, that it's the computer that's out not the home audio system, and |
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> check the cabling between the two. If you run directly off the card to |
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> speakers, make sure they're plugged in, and if powered, that they have |
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> power and are on. |
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> |
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> Try using alsamixer from a terminal window or the console command line as |
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> your mixer. I've noted that sometimes the regular GUI mixers get mixed |
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> up and don't show the critical controls. In particular, I had a card at |
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> one point that had a mute or toggle of some sort that about half of the |
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> GUI mixers couldn't see or control, but alsamixer could. It had to be in |
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> the right position to play, so for awhile, at every boot, I had to load |
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> alsamixer and toggle that switch, before I got sound. After that, I |
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> could use whatever GUI mixer I wanted to control volumes and the like, |
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> but I had to use alsamixer to turn it on properly at every boot. While |
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> that issue is long since resolved, since then, every time I have a |
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> problem, I use alsamixer to see what's really going on. |
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> |
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> Finally, while testing, use a player that has a visual output as well. |
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> That way, you can /see/ if it's actually playing, too. I've had a couple |
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> times with sound servers and/or Internet audio streams where it was |
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> supposed to be playing according to the input graph (the incoming |
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> Internet stream or player into the sound server), but the output graphic |
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> was flatlined, indicating there was no actual sound being played (due to |
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> a buffering error, either with the Internet stream or with the sound |
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> server). In both cases, I thought it was alsa or the amplifier until I |
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> noticed the flatlined activity monitor indicating nothing actually |
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> playing. |
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> |
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|
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I've only ever run alsamixer from the console. I've never used a gui to |
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configure sound. It doesn't look muted in alsamixer. |
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|
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This system is a laptop and the output goes either out the onboard |
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speakers, or most of the time headphones connected to the on board jack. |
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|
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And on of the first things I checked was whether I wasn't hearing sound |
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because of a funny stream, etc, so I loaded up audacious and played a |
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couple of MP3s to see the output. Still no sound. I'm so totally |
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confused by this. I don't recall a recent alsa update, and I know the |
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hardware is okay (at least it seems to be) since my system dual boots to |
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XP and I get great sound from it. (Sadly) |
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|
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-- |
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Libenter homines id quod volunt credunt -- Caius Julius Caesar |
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|
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|
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Mark Haney |
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Sr. Systems Administrator |
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ERC Broadband |
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(828) 350-2415 |
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|
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Call (866) ERC-7110 for after hours support |
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-- |
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