logcat info and exit game error

hi all, my game shows up info like that every tick, and how to avoid this info?
and when my game quit, shows error"obtainBuffer cblk is null 0x5efdaeb8" on audio

06-09 19:56:35.881: D/AudioTrack(30048): start 0x5efdaeb8
06-09 19:56:35.926: D/AudioTrack(30048): start 0x5efdaeb8
06-09 19:56:35.927: D/AudioTrack(30048): start 0x5efdaeb8
06-09 19:56:35.973: D/AudioTrack(30048): start 0x5efdaeb8
06-09 19:56:35.974: D/AudioTrack(30048): start 0x5efdaeb8
06-09 19:56:36.019: D/AudioTrack(30048): start 0x5efdaeb8
06-09 19:56:36.020: D/AudioTrack(30048): start 0x5efdaeb8
06-09 19:56:36.059: I/CdpDrv(30048): {CdpDrv} [~CdpDrvImp]
06-09 19:56:36.064: D/IPCThreadState(30048): [DN #5] BR_CLEAR_DEATH_NOTIFICATION_DONE cookie 0x5dd20ac8
06-09 19:56:36.066: D/AudioTrack(30048): start 0x5efdaeb8
06-09 19:56:36.066: E/AudioTrack(30048): obtainBuffer cblk is null 0x5efdaeb8
06-09 19:56:36.066: E/AudioTrack(30048): Error obtaining an audio buffer, giving up.
06-09 19:56:36.067: I/IspDrv(30048): {IspDrv} [~IspDrvImp]