I try to create an USB Audio speaker with Stm32f103c8t6. I generate project in CubeMX 4.20 for Keil v5 and i set 44100 for sound sample rate. Project compiled fine. USB device normal detected in Windows 8. Mute button in windows works normal and call function "AUDIO_MuteCtl_FS" in file "usbd_audio_if.c". But when I try to play test sound in Windows everything breaks down. Stm32f103c8t6 freeze, mute button no more works, debugger in Keil disconnect from Stm32f103c8t6.
What could be the problem?