My car radio doesn`t read 700 MB CD-Rs, why? - Club CDFreaks

Burrned · 07-03-2007

Hi,

Anybody that knows how I can get my Volvo car radio (SC-901, Alpine) to read 700 MB home-burned CD-Rs?

It reads original CDs and home-burned 650 MB CDs, but not the 700 MB ones.
I've used different brands of 700 MB CD-Rs but with no luck....

I use Nero 6 and burn audio CDs at 16x with my hp 940i (CD/DVD burner).

650 MB CD-rs are really hard to find these days, so I better find a fix to this problem!

Thanks for your help!

**TimC** · 08-03-2007

It might depend on the media you use.

I had to try a few types first before my car stereo would play them properly.

Now I use Verbatim , burned at 16x like you, and it's OK.

Burrned · 08-03-2007

OK, but I've tried Verbatim 700 MB but with no luck either....

Burrned · 13-03-2007

Nobody that knows why 650 MB plays but not 700 MB???

*Bob* · 13-03-2007

Is your player old?

*Nemesys* · 13-03-2007

Older players tend to adhere to the Red Book Standards which was designed with the 650 MB (74 minutes) in mind.

Burrned · 13-03-2007

My CD player is from 1999.

I found the following info from Plextor on how CD manufacturers increase the CD capacity:

"How have vendors managed to fit 99-minutes into one CD and keep the original size? They did it in the same way as they did for the 80-minute discs---by moving the tracks of the Helix closer together and doing an overburn beyond the "stated" capacity of the disc, which boosts the full capacity of the media beyond the given specifications, adding an additional 2 to 4 minutes. The drive uses the pre-groove (the manufactured groove in a blank CD-R/RW disc) to create tracking signals to accurately position the laser to read and write. By increasing the pitch of the helix to create a 99-minute CD, this forces the laser to track a "tighter" spiral that is less tolerant of drift, and reduces the surface area between the helix onto which the laser 'burns' the data.

This "stretching the envelope" of CD-R technology actually causes the 99-minute discs to deviate from the accepted book standards, and fail in many CD-RW drives. Any minute physical variation in the disc itself, such as thickness variations of the polycarbonate or reflective alloy, or flutter caused by an eccentric (i.e, out-of-balance) disc, are magnified at the outer edge and may result in excessive jitter, or be beyond the capability of the CD-R mechanism to read with a minimum error rate."

I guess that only by changing the firmware of my Volvo CD might do the trick. Or?

07-03-2007	#1 (permalink)
Burrned New on Forum Join Date: Mar 2007 Location: Madrid, Spain Posts: 4	My car radio doesn`t read 700 MB CD-Rs, why? <a href='http://adstats.cdfreaks.com/www/delivery/ck.php?n=a13febf7&cb=INSERT_RANDOM_NUMBER_HERE' target='_blank'><img src='http://adstats.cdfreaks.com/www/delivery/avw.php?zoneid=30&cb=INSERT_RANDOM_NUMBER_HERE&n=a13febf7' border='0' alt='' /></a> Hi, Anybody that knows how I can get my Volvo car radio (SC-901, Alpine) to read 700 MB home-burned CD-Rs? It reads original CDs and home-burned 650 MB CDs, but not the 700 MB ones. I've used different brands of 700 MB CD-Rs but with no luck.... I use Nero 6 and burn audio CDs at 16x with my hp 940i (CD/DVD burner). 650 MB CD-rs are really hard to find these days, so I better find a fix to this problem! Thanks for your help!

08-03-2007	#2 (permalink)
TimC Moderator Join Date: Mar 2004 Location: UK Posts: 7,498	Re: My car radio doesn`t read 700 MB CD-Rs, why? It might depend on the media you use. I had to try a few types first before my car stereo would play them properly. Now I use Verbatim , burned at 16x like you, and it's OK.

08-03-2007	#3 (permalink)
Burrned New on Forum Join Date: Mar 2007 Location: Madrid, Spain Posts: 4	Re: My car radio doesn`t read 700 MB CD-Rs, why? OK, but I've tried Verbatim 700 MB but with no luck either....

13-03-2007	#4 (permalink)
Burrned New on Forum Join Date: Mar 2007 Location: Madrid, Spain Posts: 4	Re: My car radio doesn`t read 700 MB CD-Rs, why? Nobody that knows why 650 MB plays but not 700 MB???

13-03-2007	#5 (permalink)
Bob I donated to the Tsunami fund and all I got was this lousy title Join Date: Sep 2004 Location: Looking for my zigzags ~ I come from the no place and i go to the no where Posts: 16,056	Re: My car radio doesn`t read 700 MB CD-Rs, why? Is your player old? __________________ "You've got a hole in your soul if you don't dig the Blues" .....My New Build is Finished. Click HERE to join CDFreaks.com Keith Richards ~ "If You Want The Last Laugh........Join The Rolling Stones"

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13-03-2007	#6 (permalink)
Nemesys CDFreaks Resident Join Date: Jun 2002 Location: Florida, USA Posts: 1,106	Re: My car radio doesn`t read 700 MB CD-Rs, why? Older players tend to adhere to the Red Book Standards which was designed with the 650 MB (74 minutes) in mind. __________________ Case: Chieftec Dragon Golden Blue DX-01BLD-U Server Chassis Motherboard: ABIT IP35 Pro CPU: Intel Core 2 Duo E8400 3.0GHz @ 4.0GHz (Tuniq Tower 120 CPU Cooling) RAM: 2GB Crucial Ballistix PC-8500 DDR2 1066 Video Card: GeForce 7900GT 256MB PCI Express x16 Sound Card: SoundBlaster Audigy ES Monitor: Hanns-G HW-223DPB (22” LCD) Audio System: MASSIVE NIC: Dual Realtek Gigabit Ethernet Controller DVD-RAM: Samsung SH-S203B SB04 DVD-RAM: Lite-On LH-20A1L BL06 Hard Drive (Internal Storage): Seagate Barracuda 1TB SATA II File Storage Hard Drive (Removables): (3) LIAN-LI SATA Mobile Racks Drive #1. Seagate Barracuda 320GB SATA II WIN XP Professional Drive #2. Seagate Barracuda 320GB SATA II WIN Vista Ultimate Drive #3. Seagate Barracuda 80G SATA II Testing http://valid.x86-secret.com/show_oc.php?id=364264

13-03-2007	#7 (permalink)
Burrned New on Forum Join Date: Mar 2007 Location: Madrid, Spain Posts: 4	Re: My car radio doesn`t read 700 MB CD-Rs, why? My CD player is from 1999. I found the following info from Plextor on how CD manufacturers increase the CD capacity: "How have vendors managed to fit 99-minutes into one CD and keep the original size? They did it in the same way as they did for the 80-minute discs---by moving the tracks of the Helix closer together and doing an overburn beyond the "stated" capacity of the disc, which boosts the full capacity of the media beyond the given specifications, adding an additional 2 to 4 minutes. The drive uses the pre-groove (the manufactured groove in a blank CD-R/RW disc) to create tracking signals to accurately position the laser to read and write. By increasing the pitch of the helix to create a 99-minute CD, this forces the laser to track a "tighter" spiral that is less tolerant of drift, and reduces the surface area between the helix onto which the laser 'burns' the data. This "stretching the envelope" of CD-R technology actually causes the 99-minute discs to deviate from the accepted book standards, and fail in many CD-RW drives. Any minute physical variation in the disc itself, such as thickness variations of the polycarbonate or reflective alloy, or flutter caused by an eccentric (i.e, out-of-balance) disc, are magnified at the outer edge and may result in excessive jitter, or be beyond the capability of the CD-R mechanism to read with a minimum error rate." I guess that only by changing the firmware of my Volvo CD might do the trick. Or? Last edited by Burrned; 13-03-2007 at 17:02.

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