FAQ   Search   Memberlist   Usergroups   Register   Profile   Log in to check your private messages   Log in  Strange protracker modules!          deliplayer.com Forum Index -> Discussions View previous topic :: View next topic   Author Message Coma Joined: 03 Jan 2024 Posts: 81 Location: Modland Posted: Mon Jan 12, 2024 12:48 pm    Post subject: Strange protracker modules! Has anyone ever seen a pro(sound/noise/etc)tracker module where the "M.K." symbol is positioned at byte 1208 instead of byte 1080? I just found a whole bunch of those among my unsorted modules. No player I've tried will play them. Any ideas? Back to top peter Joined: 18 Dec 2023 Posts: 90 Posted: Mon Jan 12, 2024 1:14 pm    Post subject: I don't have any of these modules, but here's my guess: 1080+128=1208, ie. the modules are identical to normal PT mods, except that the size of the sequence table has been doubled (allowing now 256 pattern positions instead of only 128). Those modules should play for quite a while... Back to top Coma Joined: 03 Jan 2024 Posts: 81 Location: Modland Posted: Mon Jan 12, 2024 1:26 pm    Post subject: Ah, that sounds plausible... any chance of implementing support for it? Back to top peter Joined: 18 Dec 2023 Posts: 90 Posted: Wed Jan 14, 2024 3:48 am    Post subject: Send them to me, then I'll test if the mods really have a sequence table which is double as long as normal. Back to top Coma Joined: 03 Jan 2024 Posts: 81 Location: Modland Posted: Wed Jan 14, 2024 9:32 am    Post subject: OK! I'll put a little package on your ftp. Back to top Muerto Joined: 22 Dec 2023 Posts: 122 Location: Denmark Posted: Thu Jan 15, 2024 7:23 am    Post subject: ey! Cant you put them a special folder on modland, for freak dload?? _________________ -- You cant escape Muerto -- Back to top Coma Joined: 03 Jan 2024 Posts: 81 Location: Modland Posted: Thu Jan 15, 2024 9:41 am    Post subject: Hehe... sure, they now live in the temp folder! Back to top peter Joined: 18 Dec 2023 Posts: 90 Posted: Thu Jan 15, 2024 11:40 am    Post subject: Sorry to disappoint you, but the modules are normal mods - no new format. What makes them a bit longer is a 128 byte large header (containing trash) at the beginning. No double-size sequence table:( BTW - better remove those mods from modland, to prevent preople from downloading them:) Back to top Coma Joined: 03 Jan 2024 Posts: 81 Location: Modland Posted: Thu Jan 15, 2024 12:02 pm    Post subject: Ah, too bad... thanks for checking them! I guess this is some sort of rip-protection. I'll cut'n'paste them back to their proper format! No module shall escape! Back to top Waxhead Joined: 23 Oct 2024 Posts: 29 Location: Norway Posted: Wed Nov 17, 2024 11:55 am    Post subject: Just in case you run into other strange modules here's the fileformat from the original ProTracker 2.3A package Quote: Protracker 2.3A Song/Module Format: ----------------------------------- Offset Bytes Description ------ ----- ----------- 0 20 Songname. Remember to put trailing null bytes at the end... Information for sample 1-31: Offset Bytes Description ------ ----- ----------- 20 22 Samplename for sample 1. Pad with null bytes. 42 2 Samplelength for sample 1. Stored as number of words. Multiply by two to get real sample length in bytes. 44 1 Lower four bits are the finetune value, stored as a signed four bit number. The upper four bits are not used, and should be set to zero. Value: Finetune: 0 0 1 +1 2 +2 3 +3 4 +4 5 +5 6 +6 7 +7 8 -8 9 -7 A -6 B -5 C -4 D -3 E -2 F -1 45 1 Volume for sample 1. Range is $00-$40, or 0-64 decimal. 46 2 Repeat point for sample 1. Stored as number of words offset from start of sample. Multiply by two to get offset in bytes. 48 2 Repeat Length for sample 1. Stored as number of words in loop. Multiply by two to get replen in bytes. Information for the next 30 samples starts here. It's just like the info for sample 1. Offset Bytes Description ------ ----- ----------- 50 30 Sample 2... 80 30 Sample 3... . . . 890 30 Sample 30... 920 30 Sample 31... Offset Bytes Description ------ ----- ----------- 950 1 Songlength. Range is 1-128. 951 1 Well... this little byte here is set to 127, so that old trackers will search through all patterns when loading. Noisetracker uses this byte for restart, but we don't. 952 128 Song positions 0-127. Each hold a number from 0-63 that tells the tracker what pattern to play at that position. 1080 4 The four letters "M.K." - This is something Mahoney & Kaktus inserted when they increased the number of samples from 15 to 31. If it's not there, the module/song uses 15 samples or the text has been removed to make the module harder to rip. Startrekker puts "FLT4" or "FLT8" there instead. Offset Bytes Description ------ ----- ----------- 1084 1024 Data for pattern 00. . . . xxxx Number of patterns stored is equal to the highest patternnumber in the song position table (at offset 952-1079). Each note is stored as 4 bytes, and all four notes at each position in the pattern are stored after each other. 00 - chan1 chan2 chan3 chan4 01 - chan1 chan2 chan3 chan4 02 - chan1 chan2 chan3 chan4 etc. Info for each note: _____byte 1_____ byte2_ _____byte 3_____ byte4_ / \ / \ / \ / \ 0000 0000-00000000 0000 0000-00000000 Upper four 12 bits for Lower four Effect command. bits of sam- note period. bits of sam- ple number. ple number. Periodtable for Tuning 0, Normal C-1 to B-1 : 856,808,762,720,678,640,604,570,538,508,480,453 C-2 to B-2 : 428,404,381,360,339,320,302,285,269,254,240,226 C-3 to B-3 : 214,202,190,180,170,160,151,143,135,127,120,113 To determine what note to show, scan through the table until you find the same period as the one stored in byte 1-2. Use the index to look up in a notenames table. This is the data stored in a normal song. A packed song starts with the four letters "PACK", and then comes the packed data. In a module, all the samples are stored right after the patterndata. To determine where a sample starts and stops, you use the sampleinfo structures in the beginning of the file (from offset 20). Take a look at the mt_init routine in the playroutine, and you'll see just how it is done. Lars "ZAP" Hamre /Amiga Freelancers Peter "CRAYON" Hanning /Mushroom Studios/Noxious Back to top Display posts from previous: All Posts1 Day7 Days2 Weeks1 Month3 Months6 Months1 Year Oldest FirstNewest First         deliplayer.com Forum Index -> Discussions All times are GMT - 8 Hours Page 1 of 1   Jump to: Select a forum ----------------DiscussionsQuestions and AnswersFeature RequestsBug ReportsDeveloperTips and TricksTroll GroundAnnouncements  You cannot post new topics in this forum You cannot reply to topics in this forum You cannot edit your posts in this forum You cannot delete your posts in this forum You cannot vote in polls in this forum Powered by phpBB © 2001, 2002 phpBB Group