To play the oboe in tune, you need a good embouchure and reed.
Follow these steps:
1) Place the reed tip in the center of your bottom lip and slightly roll your lip to cover your bottom teeth.
2) Cover your upper teeth with your upper lip and form a light seal around the reed. Avoid biting the reed with too much pressure.
3) To achieve the right facial posture, pretend to have a British accent and hold the expression after saying "no oboe." This will bring your mouth corners forward, chin down, jaw apart, and tongue lowered.
4) Ensure pressure is applied from all sides of your mouth to allow the reed blades to vibrate freely.
When it comes to tone production and intonation, the reed is just as crucial as the embouchure. To check the quality of a reed, listen to its "crow." Soak the reed in water for a few minutes, then form an oboe embouchure and insert the reed into your mouth up to the cork. (Note that this is not a typical embouchure, but it ensures that the reed is not being pinched at all.) Slowly blow air through the reed and let the pressure build-up. A good crow will start with a high sound, followed by a lower sound. A high-quality reed should crow a C or slightly higher.
Even with a good embouchure, proper posture, and a well-tuned instrument, certain notes on the oboe may still be out of tune. The notes that tend to be the most problematic can vary between different oboes, but the following are commonly affected.
Here are some solutions to help with difficult notes when playing the oboe. The standard fingering is shown in black, and any alternative fingering is shown in green. If there is a red key, remove it from the standard fingering. Don't forget to include all red keys if playing the standard fingering.