No audio and total freeze

I had a weird bug last night. I’m not sure what could have caused it.
The audio output totally stopped, then I tried to save the project and the machine freezed. I had to reboot.
The only reason for the bug would be that I erased two file from my sound folder on the sdcard that were assigned on two pads.
Is there any way to see what could have happened? I will try to reproduce it.