Jumpy Audio CD playback

**confus-ed** · March 4th, 2005, 09:32 AM

Mmmm .. more questions then before any more suggestions..

When you went from 'whatever' o/s you had originally (a note of that might help me/us figure it out) did you upgrade or did you do a clean install ?

If you open up device manager & click view & change that to 'resources by connection' what type of pc do you apparently have ? - it'll say something like 'ACPI PC' or 'standard pc' probably as the first or second line of the items in that view of device manager.

& if you know how - can you tell me whether ACPI is on or off in bios ?

There's a whole load of techno-babble behind what I'm thinking about (that I shan't bother anyone with unless they really want to know

, but it comes down to a thing called a HAL (hardware abstraction layer) & this can have a big impact on how well windows works - you set this when you install windows (probably without realising) depending on what it finds as bios values.

**owen080808** · March 5th, 2005, 10:21 AM

Ok

i checked and in device manager it tells me i have a "miscrosoft ACPI compliant system" which to me seems to be what you were expecting?

not sure about the bios or not, i will try and figure out how to go look tho and let you know if i can work it out.
With regards to the technobable, i am always keen to know how something works, i think it usually gives a user more of an affinity with a tool if thet know in depth what it actually does. im not saying ill deffinately fully understand all of it but it is nice to know, so long as you dont mind explaining it to us simpletons!

Before my reinstall i was using windows xp pro, with sp2 downloaded as an update. i then did a full format and clean re-install (not just an install over the top) with a newer version of xp which came with the sp2 features included on the disk.

Regarding the hibernbation issue, it does sound like i have exactly the same, frequent skipping of music from the cd drive as you do. however it is not affected by which way i shut the computer down, and nothing changes after a re-boot. are you still being affected by the problem or did you find a solution?

Thanks for your time guys

Owen

**confus-ed** · March 6th, 2005, 06:16 AM

Originally Posted by owen080808

..With regards to the technobable, i am always keen to know how something works, i think it usually gives a user more of an affinity with a tool if thet know in depth what it actually does. im not saying ill deffinately fully understand all of it but it is nice to know, so long as you dont mind explaining it to us simpletons!..

OK for HAL's ..

& a bit of pure technobabble !

.. provides the most basic operating system functions, such as first-level interrupt handling, deferred procedure call and thread scheduling, and synchronization primitives. (its the control inferface between bios/hardware & your operating system )

If you turn ACPI on or off you change what happens when devices are added that use duplicate IRQs (Interupt ReQuests) which in turn may affect your pc's ability to 'see' (detect via pnp) the items via device manager (so it can't use them) - this can be both an advantage or dis-advantage, depending what you are trying to do.

But I can't think what to add to help you much ...

Perhaps lack of codecs since you reformated ?

Do you know how to check to see if dma is enabled ?
You are looking for this :-

in device manager

**Archer** · March 6th, 2005, 06:31 AM

Just a suggestion but if you copy the files to the harddrive and play from there does the problem still occour?
One other thing if you use another application rather than windows media player like winamp does the skipping still happenm as WMP can be a bit of a memory hog?

**owen080808** · March 6th, 2005, 07:09 PM

Wow, thats a pretty in depth description, im very impressed to see just how much some people know about these things. thanks very much for taking the time to explain it!

In the box in device manager mine says "Ultra DMA mode 5" so it would seem that again my system seems to be as you expected. Regarding codecs, i dont have much knowledge, but the fact that music files from my hard disk seem to play whereas ones on removable (cd/dvd) media are affected by the 'gittering' effect suggests to me that the codecs i have should be adequate. i could easily be wrong tho, and if theres some you could recomend me to download i would happily try.

thanks again

Owen

**owen080808** · March 6th, 2005, 07:14 PM

Originally Posted by Archer

Just a suggestion but if you copy the files to the harddrive and play from there does the problem still occour?
One other thing if you use another application rather than windows media player like winamp does the skipping still happenm as WMP can be a bit of a memory hog?

Yeah, ive tried copying the files, and files that have been ripped by a drive other than my own play fine, but when i copy the files across the jumping effexct is coppied with the files, this could be due to only using WMP to quickly rip some files to check.

with regards to trying other software i totally agree with you about WMP but sadly winamp and light alloy media players are both also affected by the probllem.

thanks for being patient with me on this one guys..

Owen

**Archer** · March 6th, 2005, 07:22 PM

Originally Posted by owen080808

Yeah, ive tried copying the files, and files that have been ripped by a drive other than my own play fine, but when i copy the files across the jumping effexct is coppied with the files, this could be due to only using WMP to quickly rip some files to check.

So the question could be is the problem with the burning of your file and/ or the playback as the origional files seem to play fine?
If you take your burnt CDRs to another player does it still skip?
If you copy files across by another medium i.e. USB drive or download does the problem still occour?

**Darsey** · March 9th, 2005, 04:19 PM

Hi all, I have a similar problem and I can't seem to find a solution anywhere, maybe there is no way around this bug. I have a MAT****A UJDA730 DVD/CDRW on a Toshiba laptop. I'm running XP Pro with SP2 installed.

For some reason I am not able to read any burned cds. I can read store bought cd's music and data but not burned cd's. The older cds that I have I burned with Nero. I can read them on another computer I have here so I know that they did burn and are not empty.

Does anyone have any idea how to get around this problem? Is there any software that can be installed that will allow this type of DVD / CDRW to "see" burned files.

When I read your thread it sounded as if you were having a similar problem, your UJDA730 is not reading the files correctly.

Any ideas or suggestions would be really appreciated!! Thanks!!