GhostQ v1.4.0: CollabQ, one song for two crowds

GhostQ v1.4.0 is live at https://ghostq.xyz.

Pick a second artist in the new feat. field and GhostQ writes "A feat. B": one song for two crowds.

Two crowds, read from Qloo. GhostQ reads each artist's crowd, then asks Qloo's compare what the two crowds share.
A verse per crowd, a chorus for both. Verse 1 is for A's crowd in A's voice, verse 2 for B's crowd in B's voice, and the chorus is built on what they share, sung by both. When the artists' languages differ, each verse is in its artist's language and the chorus mixes both.
Receipts that say whose. Every Qloo signal behind a line shows whether it came from A's crowd, B's, or both.

Example: "Other Side of the Light", Lorde feat. Troye Sivan: https://ghostq.xyz/song/11zzay870y