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Author Topic: [MD/GENESIS] A few Mega Drive ROM issues on hardware  (Read 5809 times)

Offline Delek

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[MD/GENESIS] A few Mega Drive ROM issues on hardware
« Reply #15 on: February 04, 2016, 09:10:13 AM »
So ok then this have to do with my implementation of the re-construction of the loop point state. It will be fixed, 99% of that writes are not neccesary (it was a bazooka shot to see if the loop points are correctly initialized that way)

Sorry for bother you, TheDeadFish, the problem is on the tracker side.

Offline Delek

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[MD/GENESIS] A few Mega Drive ROM issues on hardware
« Reply #16 on: February 04, 2016, 10:50:03 PM »
It should be fixed now.

Offline slashz

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[MD/GENESIS] A few Mega Drive ROM issues on hardware
« Reply #17 on: February 13, 2018, 06:48:01 PM »
...
- Finally, an odd one: in the track "CASSO_BOSS," there's a low, growling instrument hard-panned left and right in the first verse of the song (after the "DA-DA-DA!" from the kick drum). After the song loops back to this verse, the instrument turns into a more straight-forward "brassy" sound, and stays like that for every loop afterwards. What's interesting is this happens with ROM file exports of the track as well as VGM file exports! The instrument only stays "dark and growly" in Deflemask.
...
Anybody else encounter similar problems?

I do did, in DefleMask v0.12.0 . One instrument changes after loop and stays that way ever after when played as a VGM file, which is different from the (desired) DMF playback.

Uhm... While writing this post, the issue was somehow resolved by accident. I've been spending a bit of time on this issue, attempting different workarounds in trying to isolate the problem. I still have an older copy with the issue to compare with though, but I'm blind to whatever the difference is, given that I've tried the following:

  • Since the issue first manifested on FM1 after loop, I moved the instrument part before the loop to FM4. (There was a detuned copy on FM3 all along but didn't seem to cause any issues.)
  • Since the part before the loop had patterns with a gate effect (volume set to 7F, A0F, repeat) with no instrument set (a instrument with long decay was triggered in an earlier pattern), I attempted to set a note off before looping.
  • Since Heavy Viper mentioned panning, I tried setting panning to different values before/after loop.

While I couldn't isolate the issue, I decided to make some changes to the track while I finally had some time to spend with DefleMask :) , so I added some more volume slides on the part after the loop (attempting to emulate compression) and suddenly the VGM sounded like the DMF!
I hope my attachments can provide more useful information than I did. :P