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	Replies: 8 - Pages: 1 - Last Post: 18-Jun-2012 09:58 Last Post By: Tonny	Threads: [ Previous \| Next ]

ford181

Posts: 3
Registered: 18/02/12

Satellite P750 makes strange noise every so often when playing music etc.
Posted: 18-Feb-2012 11:18

I like playing alot of music on my laptop, but lately this stranges keeps randomly occuring. It almosts sounds like the track has frozen up, but it hasn't because it keeps playing(like a scratched disc in a cd player freezing??).

Its just every now and then, but it is very noticeable especially when played through my good external speakes. It occurs through the inbuilt speakers, standard headphones and external speakers.

Just wondering if any has any ideas what it is and how i can fix it because it is really annoying me.
Thanks

Macius

Posts: 1,677
Registered: 26/09/09

Re: Satellite P750 makes strange noise every so often when playing music etc.
Posted: 18-Feb-2012 20:53

in response to: ford181

Your posting is pretty general and there is no one single relevant info that can help us to understand described issue.
Music can be sound that you hear while you watchg movies, music CDs, mp3 files, internet radio and so on.

Does this happen in any case or how to understand this?

ford181

Posts: 3
Registered: 18/02/12

Re: Satellite P750 makes strange noise every so often when playing music etc.
Posted: 19-Feb-2012 07:49

in response to: Macius

This comes from any kind of sound output, music, movies, mp3 files etc. and i mainly use itunes. The noise itself is hard to explain but it is like the playback is freezing. The audio jumps around for a while before returning to how it should be. I am new to this and not to sure how to say it, so if there is anything else needed please let me know.

Paolo30

Posts: 3,131
Registered: 21/09/09

Re: Satellite P750 makes strange noise every so often when playing music etc.
Posted: 20-Feb-2012 14:56

in response to: ford181

Hi

Did you notice a high usage of CPU if this strange noise would appear?
In many cases the stressed CPU might be the reason for sound freezing.

You can test this using an tool called DPC Latency Checker. It may help to find the cause for interruptions in real-time audio and video streams.

You can also start the taskmanager where you could check the CPU usage of single background processes.

ford181

Posts: 3
Registered: 18/02/12

Re: Satellite P750 makes strange noise every so often when playing music etc.
Posted: 21-Feb-2012 05:07

in response to: Paolo30

Whilst just the music is playing normallly (MP3 Itunes) the CPU usage sit between 1-3percent and when the sound freezes up it jumps to about 10-14percent. It only lasts a few seconds at most but very noticeable and doesn't sound good. Once the freezing stops the CPU drops back 1-3 and its all good until another minute or so when it decides to do it again.

PauPau

Posts: 4,280
Registered: 21/09/09

Re: Satellite P750 makes strange noise every so often when playing music etc.
Posted: 21-Feb-2012 08:23

in response to: ford181

when the sound freezes up it jumps to about 10-14percent.

Well, it seems that this sound issue is related to the CPU usage as suggested by Paolo.
Can you check what process stresses the CPU?
In task manager -> Processes tab you can see all the processes and the CPU usage

badhat

Posts: 165
Registered: 22/02/12

Re: Satellite P750 makes strange noise every so often when playing music etc.
Posted: 05-Mar-2012 04:57

in response to: ford181

This problem is about DPC latency, which affects audio/video streaming.

DPC's are to do with badly behaved drivers and so will not show up in the process list, so there is no point to suggest checking that and the CPU useage in taskmanager is too general and does not cover drivers.

It is not overall CPU stress either, as the drivers are often waiting for an event to happen, they are just delaying other drivers, that's all. DPC's are happening much more often than the blip you see on the CPU %.

DPC Latency Checker is a good tool to see generally if you have a problem, but now you need to run Latency Mon to find out which drivers are causing the problem:
http://www.resplendence.com/latencymon

Then disable the drivers in device manager until you need them. Simples.

It is probably your LAN and/or WI-FI drivers that are causing this problem.

Btw, this is a windows problem not a hardware problem and every system can suffer from it to some degree. When it becomes very noticeable that's when people want to do something about it.

Message was edited by: badhat

bpazolli

Posts: 15
Registered: 10/09/11

Re: Satellite P750 makes strange noise every so often when playing music etc.
Posted: 18-Jun-2012 02:45

in response to: ford181

I can confirm that I have the same issue on my P750. I do think it is related to processor stress. If this is a real issue for you I'd suggest turning up the minimum processor state in the power options.

I think with these new processors that try to extremely modulate the processor's speed for reduced power consumption, they can easily be jumped when a task starts and reach high stress.

To change the minimum processor state goto Control Panel > Power Options > Edit Plan Settings > Change Advanced Power Settings > Processor Power Management > Minimum Processor State.

I don't do this usually just to play mp3's, as I usually just deal with it. However, when I do music production in ableton live, if I have 2-3 tracks start at the same point, the computer freaks out and results in a similar sound.

Putting the minimum processor state to 100% does help alot, but usually it doesn't completely resolve the issue so I usually use ASIO4ALL or whatever for big projects which also helps.

Tonny

Posts: 3,225
Registered: 21/09/09

Re: Satellite P750 makes strange noise every so often when playing music etc.
Posted: 18-Jun-2012 09:58

in response to: ford181

Agree with both above:
Seems that the usage of DPC latency checker and LatencyMon helps to discover the driver what causes this interrupts.
Here is a similar thread where such issue has been solved.
http://forums.computers.toshiba-europe.com/forums/thread.jspa?threadID=67087

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