There's no reason for both a emulator and non-emulator patch.
The volume should be set to FF (max, the SD2SNES patch should have this setting), and the PCM audio should be normalized (typically at either -18dB or -21dB, using RMS normalization).
The need for different patches came from a bug in one of the chips in SD2SNES's earlier releases, that has since been eliminated (with firmware patches for the older ones). Check here for more info: https://www.zeldix.net/t1265-fixing-all-of-the-too-loud-audio-packs-for-good
A better/easier method to create the PCMs (including normalization):
Grab VGMPlay (not in-vgm).
Extract the folder, and edit the following line in "VGMPlay.ini":
SampleRate = 48000 -> 44100
LogSound = 0 -> 1
You can either drag-and-drop the VGM files onto VGMPlay.exe at this point, or convert them through the command line via batch script (I'm not that good with batch scripts, so you'll have to build that yourself)
It'll create the .wav files in the same folder as the .vgm files.
Using this method instead of in-vgm lets you stick to completely command-line, making it possible to do completely through a script.
*edit- Apparently you can just create a playlist file and load the playlist to act as a .bat for converting as well.
Now, once you've got the .wav fileshttp://normalize.nongnu.org/
Use that program for normalization.
normalize.exe -a -18dBFS [filename].wav
Does an in-place -18dB RMS normalization of the wav files.
If after playtesting, the audio is still too loud, you can use:
normalize.exe -a -21dBFS [filename].wav
On the already -18dB normalized file, you don't have to re-convert the wav's before doing the -21dB normalization.
Now that the .wav files are normalized, use wav2pcm to convert the .wav files to looped MSU-1 compatible PCM audio.
*Edit- A bit of checking shows that other MSU-1 mods for MMX needed to be -21 dB, so you should normalize to there.
October 14, 2017, 02:45:30 am - (Auto Merged - Double Posts are not allowed before 7 days.)
Your Genesis PCM pack freshly converted and normalized to -21dB.
Named/numbered the way your script would make them, so not sure if those 3 tracks you mentioned are misnamed in this or not.
Please host them on your own servers, my upload on mega is limited (free account), and I have other things I'm hosting.