It was an app modeled after Spotify, but used torrents for the actual music streaming. Those would get hand picked from actual trackers (so they have seeds already) and matched up with metadata.
There would also be a pay-what-you-want subscription that would go directly to the artists you've been listening to. It would be in Zcash, so that artists can choose not to share their donations with the label they're on. Songbee would take a small cut (I was thinking ~30%, nowadays I'd say 10% should be enough) to pay moderators etc.
I got burned out at the time, but nowadays I think it's an idea worth reviving?
[1]: some are open source at https://github.com/Songbee, some are lost forever but that's for the best