Help, Problems With Cd-rs With Oem Business Cd - BMW Forum - BimmerWerkz.com
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#1 (permalink) Old 05-09-2005, 09:39 AM
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Hi all,

Just bought a used 2000 328Ci and absolutely love it! However, I've occassionally get some stuttering/skipping on burned CD-Rs usually after I've been listening to the CD a while. Once the stuttering or distortion begins, it has trouble tracking the CD-R even when I skip back to the beginning tracks - it usually happens 3/4 of the way towards the end of burned CD-Rs. If I put in a store bought CD - its fine again - however the CDs coming out of the unit feels quite warm to the touch (is this normal?). I tried switching to another brand of CD-Rs and burned them slower at 8x (slowest my burner will allow) but the problem is still there (not all the time, usually after I've been listening for a while).

Does anyone ever experience these problems? Are there any brands of CD-Rs that you have tried that work well with the BMW Business CD deck? Are there any tricks or tips that I can do when burning stuff to CD-Rs? I'd rather copy my CDs to CD-Rs which I leave in the car - I don't want to melt my originals. Is this a problem I need to bring the car into the dealer for?

Thanks,
Wm

2000 BMW 328Ci w/ Premium Sports Pkg & Type 68 M-rims :}:
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#2 (permalink) Old 05-09-2005, 10:34 PM
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Check this post it may help...

http://www.bimmerwerkz.com/forum/ind...howtopic=36052

The reason for this happening @ 3/4 of the way through, is CDs read from the inside out, opposite of records. The data is streaming on the outside faster rate than at the center. This may be why you have a problem, it may not know what to do at those speeds. Try some of the clear backed (non colored) CDR's and a good quality (not the 100 for $9. The speed you burn them at doesnt matter. The 8x means it is spinning (recording) 8 times faster than what your normal cd spins at (its like 580 rpm or something close to that). 8x means 8x580=4640 rpm, 52x = 30160 rpm etc. A 1x burner writes 700mb in 74 minutes, 2x in 37 minutes and so on.



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#3 (permalink) Old 05-12-2005, 06:02 AM
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Da_bull is pretty much right, but I will add to it. The color can affect the performance but it is unlikely to be the cause. The problem is in the format. When you put a normal CD into a player, part of the digital signal tell the machine what speed to spin at. Toward the start (centre) of the disc it spins at around 500rpm. as the cd towards the end it is spinning as low as 200 rpm. This is so that the streaming bit rate is not affected. If you uses a CD recorder to do a bitmap copy (i.e. 1X read, 1X write) of a cd it will usually work 99-100% perfectly depending on the quality of the writer. However, cheap PC style writers and re-writers do not write this infirmation in the same way. That is why many old CD players will not play cdr at all. Newer CD players have firmware to decode the PC style speed encoding, but the encoding differs from PC manufaturer to manufacturer, and bit rate to bit rate.

So basically, the problem is in your PC/cd writer/software, not your car.
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#4 (permalink) Old 05-24-2005, 02:04 PM
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Tried the CD lens cleaner - its better, but the end of the CDs still skip occassionally, especially when it gets hot after being played for a while.

I think you're right, its the actual CD burning process. So are there any recommendations on good program/software and media discs that are compatible with the older 2000 BMW business CD head unit.

2000 BMW 328Ci w/ Premium Sports Pkg &amp; Type 68 M-rims :}:
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