Piano production requires the use of a variety of different woods. The selection of each wood has its own unique advantages and characteristics, and will also affect the sound and appearance of the piano. Here are some types of wood commonly used in pianos:

1. Birch: Birch is one of the most commonly used woods in pianos. It is a fairly lightweight wood that is both dry and hard, yet has good bending properties and accuracy. Birch can be used to make piano bodies, stands, keys and other parts.

2. Cedar: Cedar is a dense, solid and durable wood. It has excellent acoustic properties and is often used in the production of speakers and piano boards.

3. Maple: Maple is a medium-density wood, especially suitable for making keyboards and mobile tablets. It also has a bright and clear sound, so it is also used to make piano shafts and strings.

4. Oak: Oak is a hard, durable wood with good acoustic effects. It is usually used to make piano shafts and legs.

5. Sandalwood: Sandalwood is one of the highest quality woods and is rich in natural resin. It increases the sound quality of the piano and is therefore commonly used in making piano boards and keyboards.

In general, the piano is a work of art that is made by craftsmen from different parts of the world using a variety of carefully selected and high-quality woods and other precious materials, which often requires a lot of effort. Different woods can make the sound purer, the volume louder or softer, and can also uniquely demonstrate the luthier's dedication to craftsmanship and musical seriousness.