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#1
Posted to rec.audio.tech
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Computer Speaker Problem
I'm having trouble playing sound on my computer. When the speakers are
turned on, and no sound is playing it's fine, but once I start to play a sound, a horrible, loud garbled sound comes out. I've noticed that if I move my mouse, even just scroll the mouse wheel, it clears up the sound. Once I stop moving the mouse, the garbled sound comes back. Also, if I play a cd on my computer, it sounds fine as well. I've also noticed when I shutdown my computer, that sound is messed up, but the startup sound is fine. This leads me to believe there's some sort of excessive current issue. Does anyone have any ideas at all? |
#2
Posted to rec.audio.tech
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Computer Speaker Problem
jimbojones230 wrote ...
I'm having trouble playing sound on my computer. When the speakers are turned on, and no sound is playing it's fine, but once I start to play a sound, a horrible, loud garbled sound comes out. I've noticed that if I move my mouse, even just scroll the mouse wheel, it clears up the sound. Once I stop moving the mouse, the garbled sound comes back. Also, if I play a cd on my computer, it sounds fine as well. I've also noticed when I shutdown my computer, that sound is messed up, but the startup sound is fine. This leads me to believe there's some sort of excessive current issue. Does anyone have any ideas at all? You didn't mention what operating system you are using? I'd "de-install" the sound card and go to the manufacturer's website to see if there is an update to the drivers, and let the computer "re-install" the sound system. Your problem sounds like a driver/software problem to me, not "excessive current". Note that this is not really the right newsgroup for your question. The newsgroup(s) you need are most likely the ones with the word "soundcard" in them. |
#3
Posted to rec.audio.tech
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Computer Speaker Problem
In article .com,
wrote: I'm having trouble playing sound on my computer. When the speakers are turned on, and no sound is playing it's fine, but once I start to play a sound, a horrible, loud garbled sound comes out. I've noticed that if I move my mouse, even just scroll the mouse wheel, it clears up the sound. Once I stop moving the mouse, the garbled sound comes back. I have seen (well, heard) this sort of problem occur on systems which implement a power-saving mode. Specifically: on an Athlon-based system, with an AudioPCI sound card, the sound would start garbling badly if I turned on the CPU's "disconnect from the bus during idle" power-saving feature. This feature causes the Athlon to turn off its memory-cache-snooping hardware when entering a CPU-idle state, shutting down this part of the CPU core and saving quite a bit of power (and reducing CPU temperature by many degrees). However, this forces the CPU to do a complete cache-flush when it wakes up again, and this apparently adds a _lot_ of latency to the wakeup process. The latency (or the conflicts on the memory bus during the cache cleanup) were so great that the AudioPCI would fail to get valid data from memory, and would start snarling. I ended up having to put in a tweak which disabled the heat-reduction mode whenever the sound drivers were loaded, and reenabled it after they were unloaded. Similar things might happen if the sound interface were trying to share an IRQ with another device. In general ISA devices cannot share IRQs. PCI devices can, _if_ their drivers are well-behaved. Also, if I play a cd on my computer, it sounds fine as well. CD playback is usually performed by having the CD-ROM drive convert the signal to analog. It's then mixed, in analog form, with the output of the sound chip's PCM channel. As a result, it'll work fine even if something is interfering with the PCM. I've also noticed when I shutdown my computer, that sound is messed up, but the startup sound is fine. This leads me to believe there's some sort of excessive current issue. Does anyone have any ideas at all? I suspect that it's probably not a current issue, but has to do with something in the system software which is interfering with the sound card/chip's ability to get the audio data it needs. Conflicts with powersaving, another device driver (e.g. IRQ conflicts), etc. might be the problem. More details about your motherboard, sound card/chip, IRQ and other hardware assignments, etc. might clarify the situation. -- Dave Platt AE6EO Hosting the Jade Warrior home page: http://www.radagast.org/jade-warrior I do _not_ wish to receive unsolicited commercial email, and I will boycott any company which has the gall to send me such ads! |
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