This mod is an addon to soundblocks it will not work without that mod so here is the link to soundblocks
https://forum.minetest.net/viewtopic.php?t=16619

The sound used in the item "warhorn" is a modified version of the sound made by newagesoup on freesound and can be found here
https://freesound.org/people/newagesoup/sounds/348862/

The sound used in Large Horn is a sound from the soundblocks files that was unused in the mod

The sound used for the bagpipes was found on  http://www.freesfx.co.uk