So whenever I connect my midi controller to the PC the sound is not there. I had this problem before but unplugging and plugging the controller again was fixing the issue (well sometimes only restarting it worked). But now I have no sound output. There is just some strange sh noise in my headphones but that's it.

My config:

Processor: AMD A6-3650 clocked at 2.60 GHz
Processor frequency measure (core0) : 800.07 MHz
Number of cores : 4 physical, 4 logical
Processor socket : Socket FM1 (905)

Motherboard
ASUSTeK Computer INC. F1A55-M LE Rev X.0x

8 GB total memory type DDR3 to 666.73 MHz

AMD Radeon HD 6670

Thanks in advance