Having food (especially meat) fall into voids in the cutting board and spoil is a big 'No-No' in the industry so one of the main design benefits of Butcher Block is that the grain pattern is broken up. If the wood gets excessively dry, the opposing pieces and glue will maintain the structure and prevent the block from cracking or separating. The bonded structure is stronger than the wood itself and the glue is more stable so as long as the proper glue and procedure is used, its rare to see the block separate at the glue joints.
For audio purposes, the broken grain pattern reduces resonance but that tends to be countered by the glue so its a bit of a wash. Not sure if a crack in wood actually has benefits but it kinda makes sense as long as the structure isn't compromised... and of course the aesthetics take a hit.