What kind of glue can you use to repair a cracked violin?

A violin is a delicate instrument with many intricate parts. Therefore, great care must be taken when repairing cracks, damage and the like, not to compromise the quality of the sound. Hide glue has been the traditional form of violin glue throughout history due to its flexibility when set, which is less likely to inhibit the vibrations in delicate violin pieces, such as the soundpost.