if you live in america/germany (the 2 most rulecucked countries for piracy) your ISP still only really cares if the multibillion dollar entertainment company themselves sends a letter to your ISP that you did a wrongthink (see: rawdogging the latest capeshit torrent). the ISP is kinda forced to by the law, so otherwise they don't care and its in their best interest to not kick off a paying customer. and thats only for torrents on the public trackers where they can easily auto monitor allthat in bulk anyway.
for soulseek, as far as im concerned the average media company doesn't even know peer to peer is still relevant in the big '25, and if they did they probably don't give a shit unless its leaked workprints or the company is really exceptionally anal about copyright (see: nintendo). i've been sharing the minecraft movie workprint for a few months now on slsk alongside all my 90s russian house music and absolutely nothings happened, so you'll probably be fine.
and if the ISP was really looking at people's traffic like that randomly, they'd have 50 thousand other normalpoopas in their 40's looking up horse porn to laugh at before they ever get to you, if thats reassuring.