Who composes the oboe?
An oboe is an instrument, and a composer writes music. Therefore, no one "composes the oboe," because that is impossible.
It does. They are; the Piccolo Oboe (Oboe Musette) the Oboe (including various versions of today's Oboe, including different Baroque, Classical, and Romantic models) the Oboe d'amore the Oboe da Caccia also known as 'taille de hautbois' the English Horn (Cor Anglais or Cor Angle) the Bass (or baritone) Oboe the Contra-Bass Oboe the Heckelphone
The oboe d'amore is in A; the oboe is in C. The oboe d'amore is a minor third lower in pitch than the oboe, however typically music for the oboe d'amore is written so that oboe fingerings may be used (in other words, the note A is printed as a C, so that the player uses the oboe fingering for C but the note sounds a minor third lower).
there is no such thing as an oboe percussion. there is an oboe, and there are percussion instruments, but not an oboe percussion. From an oboe player: I think you might be mixed up. I play some pieces that say oboe/percussion on them, but that is because those pieces are written for middle school bands.
Yes, the oboe has a double reed, it is one of the few double reeded woodwind instruments including the bassoon and the English horn. The oboe looks like a small clarinet, except for the top. the clarinet has a barrel, a mouthpiece, and a single reed, the oboe has only the double reed at the top. here is a picture of the oboe and of the oboe reed.