Post by NK Soft in choice4genesis - a ChoiceScript clone for the Sega Genesis comments

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I am happy to have received a reply despite your busy schedule. Regarding the BGM issue, you mentioned that this behavior is not by design, so I tested it again using “Actraiser - Fillmore.vgm,” which is used in the sample program. As a result, the track looped correctly when played with the “music” command.

Is it possible that, even within the same .vgm format, some files do not loop? For example, none of the tracks from the following collection published on itch.io looped when I tested them:
https://safetystoatstudios.itch.io/free-vgms

haroldo-ok21 days ago

Thanks! In theory, it should work on all genesis-compatible VGMs, but I wil take a look.

haroldo-ok21 days ago (1 edit)

Just tested one of the short melodies from "free-vgms", and indeed, the music is not looping.

Maybe it's a non-looping VGM? I'll have to take a look at that later.

haroldo-ok20 days ago

I just used vgmcheck to test it: https://www.smspower.org/forums/12009-VgmcheckExtractLoopAndTimeInformationFromV...

I took a look at both "Actraiser - Fillmore.vgm" (from SGDK examples) and "golf.vgm" (from "free-vgms") and those were the results:

D:\Pessoal\Util\vgmcheck-2.0>vgmcheck "Actraiser - Fillmore.vgm" 
--Raw VGM information-- 
Total samples: 2275559 
Total time in mm:ss: 0:51.60 
Loop start: 17639 
Loop start in mm:ss: 0:00.40 
Loop time: 2257920 
Loop time in mm:ss: 0:51.20  
--Usage in SSBB-- (.brstm conversion) 
New loop start: 28672 
New loop end: 2286592  
D:\Pessoal\Util\vgmcheck-2.0>vgmcheck golf.vgm 
--Raw VGM information-- 
Total samples: 1693440 
Total time in mm:ss: 0:38.40 
Loop start: 1693440 
Loop start in mm:ss: 0:38.40 
Loop time: 0 Loop time in mm:ss: 0:00.00  
--Usage in SSBB-- (.brstm conversion) 
New loop start: 1705984 
New loop end: 1705984

It seems that "Actraiser - Fillmore.vgm" has a loop set up on it, while "golf.vgm" does not have a loop. (it's loop time is zero)

It looks like in order to use "golf.vgm" in a loop, it will be necessary to edit it in order to explicitly define loop ponts on it; please see: https://vgmrips.net/wiki/Manual_looping_tutorial