F♯7/A♯ Piano Chord
F♯7/A♯ is a F♯ Dominant 7th chord played over a A♯ bass note. Because A♯ is the 3rd of F♯ Dominant 7th, F♯7/A♯ is simply F♯ Dominant 7th in 1st inversion, the same notes with the 3rd moved to the bottom.
The dark key is the bass note (A♯); the coloured keys are the F♯ Dominant 7th chord tones.
Notes in F♯7/A♯
Low to high: A♯ (bass) , then F♯ – A♯ – C♯ – E.
How to play F♯7/A♯
Play the bass note A♯ low in your left hand, and the F♯ Dominant 7th chord (F♯ – A♯ – C♯ – E) in your right. Because it's an inversion, the bass is already one of the chord tones: you're just voicing F♯ Dominant 7th with its 3rd on the bottom.