it's trendy Tik Tok bs. She bought a fully formed backing track, created by another band, and added some vocals over it.
https://medium.com/@rinleonheart464/on-wisp-tiktok-shoegaze-and-the-art-in-artist-537ddafd9bc4
L.A. show was $70 each incl fees for both nights. i bought pre-sale ticket for the first night on Wednesday and then jumped on the second night about 10 mins after it went on sale yesterday.