Do Cobalt's suggestion, because this branch wasn't gonna get merged in its original state anyways.

0f164301 · toaster · 0e71edeb · 0f164301
Commit 0f164301 authored 5 years ago by toaster
--- a/src/info.c
+++ b/src/info.c
@@ -4271,7 +4271,7 @@ mobjinfo_t mobjinfo[NUMMOBJTYPES] =
 		S_DETON1,       // spawnstate
 		1,              // spawnhealth
 		S_DETON2,       // seestate
-		sfx_kc57,       // seesound
+		sfx_s3k86,      // seesound -- sfx_kc57 for a self-propelled deton...
 		1,              // reactiontime
 		sfx_deton,      // attacksound
 		S_NULL,         // painstate