Burning MegaCD games (no music)

Discussion in 'Sega Discussion' started by spinksy, Dec 24, 2013.

  1. spinksy

    spinksy Peppy Member

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    I'm a little stuck on how to burn Sega Mega CD games?

    I have burnt Sonic Megamix to a cdr which play perfect (downloaded the game as a disc image)

    However I have downloaded Sonic Cd++ (as a disc image also) and it plays but it has no music - the music will activate after you have time travelled but it doesn't work at the start of any levels?

    I have read that I need a cue file but since the download is a disc image how can that be correct?

    I'm thinking this game may just be buggy as its a hack but not 100% sure....


    Any help appreciated.
     
  2. spinksy

    spinksy Peppy Member

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    After a bit more reading it seems there is no audio tracks included with this disc image (I think)

    I'm assuming I'll have to add the tracks somehow - I'm confused....
     
  3. sonicdude10

    sonicdude10 So long AG and thanks for all the fish!

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    I tried burning Sonic CD++ myself some time back. What I did was use the NTSC version of the original game, got the ++ aspect in the form of a patcher, got another patch that improves the movie cutscenes playback, used the audio tracks from the JAP region version of the game, got the correct CUE file, packaged it all up as a .iso, burned to CD, and gave it a try. Nothing. Worked fine when playing on Kega Fusion from the DVD drive in my PC but failed on the real Sega CD.

    I'm still at a loss to this day. Bad CD media the Sega CD didn't like? Still don't know. I'd really like to play my custom game on the original console...

    As for the reason the music will play in the past but not the present or future, that is due to the fact the music for the past is located inside of the main game .bin file. The rest is in the form of audio tracks seperate from the game .bin file.
     
  4. APE

    APE Site Supporter 2015

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    From the sound of it the patches weren't made with real hardware in mind. Sonic++ may have been but the additional patches you use probably weren't.

    Emulators are an amazing convienence that at the price of free we should be down on our knees thanking these people for putting together for us but they are hardly a proper substitute for real hardware.
     
  5. sonicdude10

    sonicdude10 So long AG and thanks for all the fish!

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    In all honesty the improved movie playback patch was made with the real CD console in mind. I know for fact the ++ patch works on real hardware too. That leaves me confused as those are the only 2 patches I used. I even tried with no patches and it still wouldn't work. Maybe my burning method was screwed? I'll have to try it again sometime now that I have a better CD burner and some decent CD media.
     
  6. l_oliveira

    l_oliveira Officer at Arms

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    MEGA-CD requires pregap on the audio tracks. The first audio track pregap after the data track is particularly important. Some CD dumping tools actually insert the pregap on the extracted wav files and that results into 2 seconds of silence at the start of each wav.

    No pregap and it will malfunction at CD-DA playback.
     
  7. spinksy

    spinksy Peppy Member

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    Thanks for the replies - I'm a bit lost with it all so looks like it's without music or nothing.

    If anyone sorts it or finds a way to get it running with music please let me know.
     
  8. retro

    retro Resigned from mod duty 15 March 2018

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    Buy the game? ;)
     
  9. sonicdude10

    sonicdude10 So long AG and thanks for all the fish!

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    You're missing the point. He, as well as me, want to burn a hack of the game to a CD. We don't want the plain game. Sonic CD++ is a hack that will play on original hardware if burned properly.

    I have a copy of the official pressed disk game somewhere around my heap...
     
    Last edited: Dec 28, 2013
  10. l_oliveira

    l_oliveira Officer at Arms

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    I was saying that the damn real thing requires PREGAPS on the audiotracks and nobody ever paid attention.

    What the heck is a pregap, you ask ? It's some sort of "landing zone" (silence) zone put between tracks to allow for the laser to travel from a track to another without "pops" of audio.

    The BIOS and the Drive hardware on a REAL MEGA-CD will malfunction if a game disc with audio tracks has no pregaps...

    If a game work on a emulator, it doesn't mean it will work on the real hardware as it is.
     
    Last edited: Dec 28, 2013
  11. spinksy

    spinksy Peppy Member

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    As sonicdude10 says this is a hack - I have the real game it's just I want to play through the hack as there are several differences.

    @l_oliveira I saw what you said but I don't really know how to do it - I also haven't got the audio tracks needed on my PC.
     
  12. l_oliveira

    l_oliveira Officer at Arms

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    There's two ways of making copies of MEGA/SEGA-CD discs:

    BIN/CUE -> This kind of image has the tracks information on the cue file (which is a text file) and the disc data is stored on the bin file. This keeps the disc structure untouched so the gaps are preserved.

    MP3/ISO -> This format gives a lot smaller images as a lot of data is discarded, including the gaps. This is ok for emulators since the emulator doesn't care about the original disc structures as it will "rebuild" the disc structures when it's emulating the system.

    So the ideal format for copying these is BIN/CUE, but because the main target of the ISOs floating the internet are emulation, you have to learn how to deal with that.
     
  13. Druidic teacher

    Druidic teacher Officer at Arms

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    Last edited: Jun 22, 2017
  14. l_oliveira

    l_oliveira Officer at Arms

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    In this particular case, all MEGA-CD games will have at least one pregap in the beginning of the first audio track. Just look any original disc. You're obligated by the drive to *at least* put one pregap on the first track after the data track. Not doing so will cause the drive to not be able to play any CD-DA tracks... Some games may even hang because they wait for the drive to return "playing" status and since that never happens ... You know ...

    Besides that, games may rely on the pregaps for track timing too, since you can tell the drive to seek to a specific area of the disc in several different ways.

    That's why I keep saying that the ideal way is make a bin/cue image of the original disc.

    This is the TOC of my original Japanese copy of Earnest Evans:

    Can you see there's 00:01:59 (1 second/59 frames) gap every audio track ? It's not specially called "pregap" but it's a gap. If these gaps are not there, the MEGA-CD will play a little bit of the end of the previous track by accident when the laser hovers to it and start playing.
     
    Last edited: Dec 29, 2013
  15. APE

    APE Site Supporter 2015

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    I was able to get Sonic CD++ running just fine earlier and gasp, I had made sure to preserve pregaps! I don't know where this FMV patch is but I'd give it a shot if given a link. Can't be that hard to generate a full disc image with it.
     
  16. l_oliveira

    l_oliveira Officer at Arms

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    The video (you can't call that FMV sadly lol) data is within the ISO filesystem so it's on the 1st track.
     
  17. APE

    APE Site Supporter 2015

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    So it's a matter of swapping out the appropriate data and rebuilding the image? Not remotely difficult.
     
  18. Druidic teacher

    Druidic teacher Officer at Arms

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    Last edited: Jun 22, 2017
  19. l_oliveira

    l_oliveira Officer at Arms

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    These games don't work correctly when the gaps are missing. Why don't you give it a try ?
     
  20. spinksy

    spinksy Peppy Member

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    If someone could re build the disc image file I'd be very grateful.

    I have no clue when it comes to this kind of stuff although I do at some point want to start learning a bit more about it.
     
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