I managed to edit things in schism and modplug. I must correct myself in that modplig didnt bloat the filesize as I thought it did.
Now I am trying to get bit-perfect output of AppleWin playing Ultima4 sound effects. I managed to enable win7's loopback driver but guess what? Microsoft MANGLES audio passed through loopback! Cannot get clean square wave output as generated by AppleWin.