How do transpose piano to oboe?

To transpose a piece of music written for piano to oboe, subtract 1 semitone from the original key. For example, if a song written for the piano is in C major, it will need to be played in B major on the oboe.

Here's a table showing the piano keys and their corresponding oboe keys:

Piano key | Oboe key

---- | ----

C4 | Bb3

C#4 | B3

D4 | C4

D#4 | C#4

E4 | D4

F4 | Eb4

F#4 | E4

G4 | F4

G#4 | F#4

A4 | G4

A#4 | G#4

B4 | A4

So, if you have a piece of music written in C major for the piano, you would play it on the oboe in B major, starting with Bb3 instead of C4.

Here's an example of how a simple melody in C major would look when transposed for the oboe in B major:

Piano: C4 D4 E4 F4 G4

Oboe: Bb3 C4 Db4 Eb4 F4