121 has something to do with music, maybe loading or playing
Code:if(pktType == 121) { int j2 = inStream.readUnsignedWordD(); int k10 = inStream.readUnsignedWordC(); if(musicEnabled && !lowMem) { nextSong = j2; songChanging = false; onDemandFetcher.method558(2, nextSong); prevSong = k10; } pktType = -1; return true; }