What audio interface are you using? Bryan On Dec 24, 2011, at 10:11 PM, darwin may wrote: Hi I am having problems ith my Sonar 8.5. When I play a note on my M-audio Oxxygen 25 the notes will crackle and it will drop out. I am using a Lenova Y-530 and am run vista. I have tried adjusting the latency and buffer size. Someone please help thanks. If you would like to try to help me by phone my number is 1314-397-1971