How do i get the secret songs?

[pernero]

i only have 3,how do i get more?

[IAMTHEEVILBEAN]

THERE ARE NO MORE!!!!!!!!!!!!!!!!!!!!!!!!!!!!! god

isnt it obvious that no more appear.......more will come soon probably

[carnage]

There are only three.

[DrunkCat]

Don't listen to them, they are lying. Of course Synth put more than 3 songs. Just gotta look for the one pixel button somewhere in the game.