The cor anglais, or English Horn, is a tenor oboe usually tuned lower to F. The oboe d’amore, is also tuned a few steps lower than a standard oboe. The bass or baritone oboe is a whole octave lower than the common oboe. The rare heckelphone is similar to the bass oboe. There is also a contrabass oboe for even lower tones.
The oboe musette, or piccolo oboe, is tuned higher than the oboe. Less common variations of the oboe can be found throughout Europe.