Start from the top! Stop! Select all lines! Deselect all lines! Invert selections! Save selections! Load selections! Random selections! Reset timing tweaks! Jerry. (Don't press this.)

When the first mash-ups of the Sans/Chara parodies came out, you couldn't look in the comment sections without inevitably seeing complaints about the masher-upper's choices. So why not, like, make your own instead?

When it comes to producing a high-quality mash-up, this definitely won't replace proper audio mixing. But it was a fun exercise in development, and I think it's fun to play around with! - GhostMixtape

Click lines to toggle them. Italics = On. You can even toggle while the song is playing!

Tweak timings with input boxes. First box is start time, second box is cut-off time. Try to keep the start times for each line the same for each singer, or things get weird.

Refresh to reset selections (but timing tweaks will be saved)

Exporting your mix to a sound file is not supported (yet?), but take a look at this page if you're desperate.

If the audio starts off out-of-sync, just hit play again

Choosing lines doesn't seem to work on mobile, sorry!