diff --git a/README.md b/README.md index 236b0558..8878dc66 100644 --- a/README.md +++ b/README.md @@ -1771,6 +1771,34 @@ like the Mega Drive's Mega CD and the PC Engine's CD-ROMĀ², such as CD-quality music and full-motion video. +One thing to be aware of +when importing an MSU-1 game +is that early firmware versions +of the [SD2SNES][sd2snes] programmable cartridge +had a bug that caused MSU-1 music to play too quietly. +Skipping over [the full details][msu1vol], +the short version is this: + + - If offered the choice between "boosted" or non-boosted audio, + you want the non-boosted version. + - If an MSU-1 mod for a commercial game offers + "emulator" and "hardware" versions of the patch file, + it means the audio tracks are already boosted. + - Some + [third](https://www.zeldix.net/t1265-#18320) + [parties](https://www.zeldix.net/t1339-#19818) + have created replacement, non-boosted audio tracks + for the most popular MSU-1 mods. + If the mod you want to play has a replacement pack, + use it with the "hardware" version of the patch. + - Even without access to non-boosted audio tracks, + it may be that the existing audio is only slightly boosted, + so try the "hardware" version first, for best quality. + - If the audio tracks are heavily boosted, + the "hardware" patch may sound terrible, + distorting and clipping, + in which case try the "emulator" patch. + To import an MSU-1 game: 1. If you have a single, large file @@ -1781,7 +1809,7 @@ To import an MSU-1 game: Go read Mercurial Magic's documentation instead of these instructions. 2. Otherwise, - Import the Super Famicom ROM with icarus, + import the Super Famicom ROM with icarus, [like a regular game](#importing-and-playing-regular-games). - If this is a homebrew game with MSU-1 support, there will probably be an ordinary ROM @@ -1793,11 +1821,8 @@ To import an MSU-1 game: Get a copy of the correct version of the commercial game, apply the patch with a tool like [Flips][flips], then import the patched file. - - If you have to choose between two patches, - you want the "hardware" version, - not the "emulator" version that lowers audio quality - to match [a bug][msu1vol] - found in old [SD2SNES][sd2snes] firmware revisions. + - If there's "hardware" and "emulator" versions of the patch, + see "One thing to be aware of..." above. 3. Find the game folder in [the game library](#the-game-library) that icarus created when it imported the game. 4. Copy the MSU-1 data file into the game folder. @@ -1809,11 +1834,7 @@ To import an MSU-1 game: create an empty file named `msu1.rom`. 5. Copy the audio tracks into the game folder. - If you have to choose between two sets of audio files, - you want the regular files, - not the ones that are "boosted" - (potentially losing quality) - to work around [a bug][msu1vol] - found in old [SD2SNES][sd2snes] firmware revisions. + see "One thing to be aware of..." above. - These should be named `track-1.pcm`, `track-2.pcm`,