Hi I have just downloaded Nero to make a audio cd from song I downloaded from Winmx and I have convert them all to .WAV. I tried burning 24x blank cd-r disc I managed to burn 6 songs on this disc then I got...burn process failed at 1x(150KB/s) ihave also tried different speeds 2x 4x all with the same result. However I used a 32x blank cd-r disc and I managed to burn 16 songs on this one. Can anyone tell me why this is happening and why I can't manage to get a full cd burn? I have a YAMAHA CRW4260 and using Nero 5.5.8.0. All help greatly appericated! :)

The CD recording process can't be interrupted in mid-session. Once the laser starts writing, any interruption would create a physical gap on the disc that could confuse CD readers. The recorder must always have data to write, from the moment the recording starts until the session ends. To avoid a situation where a temporary slowdown in the computer causes the write process to fail, the makers of CD recorders put a write buffer in the drive, usually between 512K and 4MB in size. Data read from the hard drive, tape, or another CD is stored in the buffer, and pulled out as needed by the recorder. If the recorder requests data from the write buffer, but there's none there, it's called a buffer underrun. The disc is still spinning, but there's no data to write, so the recording process aborts. You can still use the disc with multisession CD-ROM drives by closing the session and starting another, assuming there's enough space left on the CD, and assuming your pre-mastering software didn't choose to finalize the disc for you. If you were using disc-at-once recording, you're probably out of luck. Advice for preventing buffer underruns is scattered throughout this FAQ. A brief summary: Use a fast, AV-friendly hard drive (i.e. one that doesn't do slow thermal recalibrations). Pretty much all drives sold in the last couple of years fall into this category. You don't need a screaming AV-optimized drive. Record at a slow speed - it takes longer to empty the buffer when recording at 1x. Don't do anything else with the computer while recording. Don't record from a file server. Defragment your HD, especially if you're doing on-the-fly recording. Record from a disc image file rather than on-the-fly. Depending on your setup, putting the recorder and your hard drive on separate SCSI controllers may be necessary. Keep your CD-R cool. Sometimes the drives fail when they overheat. Also watch out for things like anti-virus programs that wake up, virtual memory settings that cause swapping, screen savers that activate during the CD creation process, unusual network activity, and background downloads of data or faxes. One way to check is to run the HD defragmenter in Win95. If it restarts every few seconds, it's because something is hitting the drive. Some game discs use a form of copy protection where bad sectors are deliberately placed on the original CD. Attempting to copy one of these discs on the fly may fail, because some CD-ROM drives slow down and repeatedly try to read the "damaged" blocks. The slowdown may result in a buffer underrun before the CD-ROM drive reports an error. Some recorders have technology that cleanly stops recording right before the buffer is about to empty, and allow recording to restart when the buffer is full again. See section (2-31). A utility included with Microsoft Office, called "FindFast", will occasionally start up and scan your hard drives. Disabling this by deleting the shortcut in the Windows\Start Menu\Programs\StartUp folder may be necessary. If you're using Windows, see the sub-sections on Auto-Insert Notification and VCACHE settings, below. http://www.roxio.com/en/support/cdr/bufunder.html has a comprehensive collection of buffer underrun info. http://www.adaptec.com/support/configuration/cdrec.html is interesting reading for users with CD-Rs attached to Adaptec SCSI cards. They're pretty far on the conservative side, but if you're having trouble this may help you. An article by Dana Parker entitled "CD-R on the Safe Side: Seven Rules of Successful CD Recording" in the April 1997 issue of Emedia Professional (http://www.emediapro.net/EMtocs/emtocapr.html) listed the Seven Habits of Successful CD-R Users: Defragment Your Disk Use a Partition for Staging Input Create a Real Image Test before writing Stabilize Your System for CD-R Shut Down Other Applications After the Burn: Label and Test If you really want to be careful, you can shut down background stuff under Win95/98 with WinSolo from http://www.procode.com.au/winsolo/. Another option is WinTasks 2000 from http://www.liutilities.com/wintasks2000/. (Side note for search engines: Ahead's Nero refers to buffer underruns as "loss of streaming".) To avoid buffer underruns and other errors when writing at higher speeds, you should make sure that DMA mode is enabled for your burner. To do this in Windows 95/98/Me, go to Start/Settings/Control Panel/System and click the Device Manager tab. Double-click CD-ROM and select the model for your CD-RW drive. Click Properties and then click the Settings tab. Look for the DMA check box under Options and click it to put a check mark in the box. Click OK and your PC should reboot. You may also need to enable DMA mode in your BIOS settings. To learn how to do this, refer to your system's documentation.

Thank-you lots :)