Dear Starship,
Many thanks for your detail reply.
I use my android mobile phone (using woMic app) microphone to record my vocal. For monitoring of my cakewalk while making music/mixing, i use my in-ear earphone.
Regarding the playback on my edifier (using cakewalk DAW , using windows media player and also playback on bandlab website that i uploaded), the entire mix sound harsh, muddy.
The rest of your comment is very advanced and high level for me, i have to digest slowly.
Thank you.