The short version is that I wanted a better tag app, and I wanted to express my appreciation for the barbershop community and for Fog City Singers. See background for the long version.
It got cut in the mad dash to get out a new version for the google play store. It might come back in future.
On the sheet music view, there's still a button to play the root of tag's key like you could in v1. (If the key is missing from the tag's metadata, v2 uses F since that's the most common key for tags.)
In v2 you can also long-press the "g" icon on the home screen to hear a G. That makes it easier to get to than the pitchpipe in v1.
Cloud sync wasn't reliable, and I'm pretty sure hardly anyone was sharing favorites. Adding the sharing feature was, honestly, a way to try to get the apple app store to approve v1. (It seemed to work, btw.)
Both those features added a huge amount of complexity, and I decided I needed to streamline the app if I hope to make it sustainable for the long term.
So glad you asked. See transitions.
The bottom buttons on the sheet music view — play key note, play tracks, navigate up/down in list — disappear after a few seconds so you can enjoy the sheet music with fewer distractions.
Tap on the sheet music to make the buttons reappear.