So chances are I'll probably not be able to get the audio working without some converting. Bummer. I wonder if anybody can confirm if these games are ALL ape or maybe just a few of them. I don't want to share the location where I can get it but it's pretty well known. I just don't want to blow +100gb getting the collection if it's not going to work.

@mitu exacly, thanks man ;)

@lostless nahh, im not using filters i am aware of that, i have my pi hooked up to a crt direcly, i just have my boot config modified, so i have menus ate 480p and that switch for game to 240p. something like this https://retropie.org.uk/forum/topic/8476/retropie-240p-15-khz-rgb-scart-tv-guide/2

@edmaul69 @mitu Looks like unzipping them was the trick. Also, changing the lower-case .bin to upper-case .BIN was also something I missed. Thank you both for the quick replies and help.

@edmaul69 In the end I tried a different game, I hadn't tried others as I'm not a big PC engine fan just wanted to play that particular game, no problem. So I acquired a copy of the game from a different source, and that's running no issues. Must of been a corrupt file or something. Thanks for your input @Darksavior @lostless

@skepticalgeel CHD or compressed hunks of data (or compressed hard disk depending on who you are talking to) started with MAME..sorta speak... If you have the mame package from the website there you have the tools to compress them. You might want to use a GUI program to make it easier. QMC2 has one. You will need to compress each bin/iso individually. That is one iso (bin/cue..ect..) one chd file. They are much smaller even smaller than a psx .bpb format and no cue/bin or cue/iso ect needed. Good luck! :D

@cowguy27 i guess the first thing i should have had you try, open up the .cue file and make sure the .iso or .bin is named correctly to match the real file. So if the iso is named dRacuLa.isO you need make sure the inside of the .cue file matches that. On linux case sensitive is important. Even on the file extension.

@chadicus what operating system do you have? In windows you can just open them in notepad.

So i fixed my issue...did a crc check on the syscard.pce bios...it was the wrong checksum. Finding the correct checksum bios solved my problems.

Take a CUE/ISO/WAV TGCD disk image and burn it to disk, then re-rip it. Do this 10 times, and the crc/hash/ect of the file will be identical to the one you started with (assuming you're using good ripping/burning software). Take a CUE/BIN image of a TGCD game, burn and rerip it ONCE, and you'll get different file sizes. By the second time you did this, you'd be lucky to get an emulator to load the image (or the actual hardware to load the disk) anymore. File sizes are VERY important with a TGCD backup. At least for the type of data disk TGCD games are you CAN NOT properly back them up ANY way except CUE/ISO/WAV. I've followed the TG16/TGCD emulation/backup/preservation for about 20 years now, and this was a MAJOR issue with backups until NightWolve made TurboRip, which allowed for perfect rips almost every time. Oh, and CUE file problems for TGCD games should be handled by TOCfixer (http://www.ysutopia.net/index.php?ind=downloads&op=entry_view&iden=4), not Sega CUE Maker. TOCfixer can also help you properly covert those crappy CUE/ISO/MP3 backups you find to proper CUE/ISO/WAV backups.

@edmaul69 oh that's really good info! I think it's possible that by converted bin + cue are the real problem

Well i got the bios working, but i still cant get Rondo of Blood working, Lords of Thunder works just fine though.

I didn't think of that, thanks @NastyButtler322.

yep, i have tried a few files and all are fine regardless of format. i have found though that the filename of the bin/iso as referenced in the .cue often still has (Japan) etc whereas it has been removed in the filename so they needed to be sorted, although obviously i had tried that early on to no avail.

Thanks everyone for your help!.... got it running finally. Turns out it was a (TINY) error in the cue and bin names that i over looked. GAME ON!!!

@mediamogul Thanks as soon as you mentioned that I went in to prefs and you were right. So I changed it to Unicode (UTF-8)

you can try with UXS : https://retropie.org.uk/forum/topic/5291/soft-universal-xml-scraper-v2-easy-scrape-with-high-quality-picture

Glad you got it sorted. Happy to help.

@BuZz I find it strange that happened. I never messed around with those configuration files because I didn't want to break anything. Sure enough, I went in and changed the volume to 100 and it's back. Thank you very much.

@Lyle_JP The ISO format doesn't make use of a cue sheet. Because of that and a few other format differences, they're really only useful for imaging unprotected, single track CDs and DVDs. You can convert between the two formats, but you'll always get data loss with anything more complicated than a single track disc.