Changed default audio sample rate to 44100

Ignore-this: 5fca6d4f81c503481660e45ebcb015f8

darcs-hash:20100905084321-58252-dfba00a761fb89532ae539cb1e09bc9ae9ae11d1
Stop using audio device when idle on Snow Leopard

Ignore-this: 9e0c6f7d5815cb05662fd6849832b4c3

darcs-hash:20100905140929-58252-74114a2d0fc5f0e52e31f036f88fecae4f069a0e