1.Why can’t I make a high-resolution surround DVD-Video disc? Why do I need DVD-Audio?

2. Is SACD the same as DVD-Audio?

3. What format does discWelder support for converting from DSD to PCM?

4. I hear that a DVD has "zones".  How many "zones" are there and what are they?

5. What is a "universal disc"?

6. What is a dual disc?

7. Does discWelder play DVD-Audio discs on my computer?

8. Can your discWelder products "rip" commercial DVD-Audio discs?

9. What DVD burners does discWelder support?

10. Can I use MP3's with discWelder?

11. Can I use Dolby Digital with DVD-Audio?

12. Will a DVD disc I created in discWelder BRONZE play in my DVD player?

13. How do I know if my player plays DVD-Audio?

14. discWelder burns the disc fine but it doesn't play in my player.  What’s wrong?

15. With my Mac version discWelder BRONZE, if I open BRONZE up with a disc already in the burner, BRONZE gives me an error.

16. What is "mirroring" or "auto mirror"?

17. Can I create a surround disc in 24/96 using discWelder?

18. What happens if I try to create a surround disc in 24/96 without MLP?

19. What is the size limit of each of the DVD "zones"?

20. Can SurCode or discWelder products turn my standard stereo audio files into high-resolution surround?

21. What's lossless encoding?

22. Can I create a disc image using discWelder?

23. Can I burn a standard red-book audio disc using discWelder?


Why can’t I make a high-resolution surround DVD-Video disc? Why do I need DVD-Audio?

1. Because DVD-Video MUST have some type of video, it does not leave enough room for uncompressed high resolution surround sound. The audio must be encoded into Dolby Digital or DTS. The DVD-Audio format was specifically created for high-resolution stereo and surround sound on DVD discs.

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Is SACD the same as DVD-Audio?

2. SACD is a high-resolution audio format created by Sony and is a direct competitor to DVD-A. SACD uses proprietary audio files called DSD (not PCM audio wav/aiff) using special hardware/software. SACD discs can only be mass-produced by manufacturing; they can't be "burned" from a DVD burner, nor can a single reference master be created in a studio. discWelder STEEL software can take the DSD audio files (normally used for SACD authoring), and convert them to burn a DVD-A title.  This allows SACD equipped facilities to hand their clients a reference master disc while the SACD title is being manufactured.

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What format does discWelder support for converting from DSD to PCM?

3. discWelder will convert DSD files into two PCM different resolutions.  Standard conversion is set to 24 bit 48 kHz. If you require a higher PCM sample rate, a menu option can be set to allow 96 kHz.  The PCM files are stored to a folder of your choice if you wish to use them for further production or archiving.

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I hear that a DVD has “zones.”  How many zones are there and what are they?

4. The DVD specification allows for as many as three Zones on a DVD.  They are:  The Audio Zone for DVD-Audio high resolution audio; the Video Zone, where your movies are stored; and The ROM Zone, which is only accessible by computer as a DVD-ROM. Each zone is separately formatted and requires a compatible player.

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What is a “universal” disc?

5. A Universal DVD title is one that will play both in a DVD-Video and DVD-Audio player. It has both a (DVD-)Audio Zone and a (DVD-)Video Zone. Most commercial manufactured DVD-Audio discs are actually Universal discs.

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What is a “dual disc”?

6. A DualDisc is a double-sided DVD-like optical disc that contains DVD data on one side and a CD-DA data on the other. DualDiscs do not conform to either the DVD or CD specifications and, as a result were short lived due to player incompatibilities.

The DualDisc format was developed by a group of record companies including MJJ Productions Inc, EMI Music, Universal Music Group, Sony/BMG Music Entertainment, Warner Music Group, and 5.1 Entertainment Group[1] and later the Recording Industry Association of America. Several companies, including Warner, 5.1 Entertainment and Silverline, produced DualDisc titles with DVD-Audio audio data on the DVD side.

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Does discWelder play DVD-Audio discs on my computer?

7. No, discWelder only authors DVD-Audio discs, it cannot play them back. However, there are DVD-Audio software players by WinDVD, PowerDVD, and Creative Labs.

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Can discWelder “rip” commercial DVD-Audio discs?

8. We do not make any ripping software, just DVD-A authoring tools.

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What DVD burners does discWelder support?

9. Any DVD-R/RW or DVD+R/RW burner that supports the MMC (Multimedia Command) standard is supported in all current discWelder products. Dual layer drives are supported.

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Can I use mp3s with discWelder?

10. The DVD-Audio format does not support lossy compressed audio formats such as mp3, WMA, AAC, etc. Although great for the Internet, these are inferior sounding compared to the sound of uncompressed PCM audio. You can import uncompressed .wav or. aiff files into discWelder.

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Can I use Dolby Digital with DVD-Audio?

11. DVD-Audio is a format designed to use all of the available bandwidth on a DVD disc for audio. Freeing up that space by eliminating bulky video data allows high resolution audio to be stored on the DVD. DVD-Video uses almost all of the bandwidth for video, leaving very little space for audio. DVD-Video needs Dolby Digital to shrink the data rate down so the audio will “fit” in the data stream. Since DVD-Audio is using all the bandwidth for audio, it doesn't need to depend on lossy compression such as Dolby Digital or DTS. No lossy compression is accepted in DVD-Audio as it is a format meant for only high resolution stereo and MLP-encoded surround audio. MLP is used to losslessly reduce the data rate to accomodate the limitations of the DVD-V format.

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Will a DVD disc I created in discWelder BRONZE play in my DVD player?

12. No, discWelder BRONZE creates DVD-Audio discs.  These discs require a hardware or software player that supports the DVD-Audio format.

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How do I know if my player plays DVD-Audio?

13. Look at the official DVD logo or badge on the faceplate of your player. If it says DVD-A or DVD-Audio, it can play DVD-Audio discs. If it only says DVD-Video it can play commercial DVD-V titles, but cannot recognize DVD-Audio data on a disc.

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discWelder burns the disc fine but it doesn't play in my player.  What’s wrong?

14. Check to make sure the player is a DVD-Audio player. If the official DVD logo doesn't say DVD-Audio, it will not recognize the DVD-Audio format. Compatibility of the DVD R/RW media might also be a factor. There is still a fair amount of non-compatibility between types and brands of blank DVD media with various players and burners. You may need to experiment with different type and brands until you find one that works best with your burner and players. Check with the burner and player manufacturers to see what types and brands of R/RW media is compatible with your models.

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With my Mac version discWelder BRONZE, if I open BRONZE up with a disc already in the burner, BRONZE gives me an error.

15. In Mac OS’ CDs & DVDs System Preference, make sure Ignore is selected for the "When you insert a blank DVD" setting. Otherwise, wait until discWelder opened before inserting a DVD into your drive.

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What is “mirroring” or “auto mirror”?

16. Mirroring or auto mirror is a feature of the discontinued discWelder STEEL product that automatically created a video zone and menu structure on a DVD to create a Universal disc playable on any DVD player.

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Can I create a surround disc in 24/96 using discWelder?

17. Yes, if the sound files are lossless encoded with Meridian Lossless Packing (MLP). The 13.8 Mbps data rate of uncompressed 24/96 surround audio far exceeds the 9.6 Mbps maximum data streaming rate of DVD players. MLP is needed to losslessly bring the data rate to within the limits of the DVD player without changing the audio quality.

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What happens if I try to create a surround disc in 24/96 without MLP?

18. discWelder will automatically resample the file to 24/48 with its Resolution feature.

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What is the size limit of each of DVD Zones?

19. The size of any or all of these zones is not predetermined.  You can make then as larger or small as you want.  The only size limitation is the DVD disc itself.

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Can SurCode or discWelder products turn my standard stereo audio files into high-resolution surround?

20. No, nothing can create true surround from stereo or mono files, say a helicopter flying in a circle around the speakers, but “upmixing” processors can create a reasonable sense of envelopment from stereo content. We at MASI recommend DTS Neural Upmix or Soundfield’s UPM-1.Your surround receiver should already have settings to get the signal to all the speakers, or you can use your receivers Pro Logic II decoder to simulate surround sound. Up-sampling audio does not improve the audio quality of the sound file, nor does it create surround from stereo.

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What's lossless encoding?

21. Lossless encoding is data compression for audio but, unlike lossy compression used by mp3 and AAC, it doesn't "throw away" any audio. The decoded file is identical, bit for bit, to the original file. It maintains the original quality of the audio, but can't shrink the file size down as much as lossy encoded files. MLP is the lossless codec specified for the DVD-Audio format.

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Can I create a disc image using discWelder?

22. Yes, the discontinued discWelder STEEL product supported the creation of disc images.

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Can I burn a standard Red Book audio disc using discWelder?

23. Using the discontinued discWelder STEEL product, you can choose to burn a standard Red Book audio CD instead of a DVD-A title.

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