First of all, you have to be clear that the tone of the songs played in KTV has not been adjusted! Normal is the default of the original tone! Even if someone has adjusted the pitch of a song, the next song, or repeat the song, the pitch will be restored to the original tone, most KTV is so!

If you feel that the tone of singing in KTV is particularly high! This is related to the level of your singing!

First of all, when you are humming by yourself, you are singing according to the key you can sing! When you listen to the stereo and sing along, because the stereo's song covers your voice, and you do not sing loudly! So it's hard to check whether your own voice is good or not!

But in KTV is different, usually KTV stereo are louder, you hear the music accompaniment, the person who sings is you!

So, singing in KTV or on stage performance, and usually humming or singing along with the CD player is a completely different matter!