This app is designed to help singers, soloists and choristers find the right note when they are practising. This app can produce tones in the Bass/Baritone range. The lowest note is E2 and the highest G4. C4 is middle C. The tone produced can be chosen from either a piano or trombone. In this new version the user can select # or b labels for the buttons depending on the key being sung in. A sequencer has been added. This allows the user to play short extracts from a piece. I find this useful when I am trying to learn a piece containing awkward intervals.