Firstly, thanks for your mods. You mention no being an audio guy. Some advice from a hobbyist with an interest in audio: a) encode the audio at a higher bitrate (192kb/sec is the highest Xwm supports; vanilla Skyrim is a very low 48 kb/s) ; b) be aware of volume levels eg measured via RMS, and try to match them when replacing. Foobar is useful for the latter. Drop and drag audo files, right click, select Replay Gain > Per File.
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