Thank you for your detail instruction. I did follow through but unfortunately, it didn't work. I renamed those files and BIAB did seem to be reset when I restarted it but it still shows the "can't find sound file GM.DLS message" and then crashes without the access violation error message it previously displayed before renaming the two files. I also noticed that the right lower corner, there is a pop message says something like " your audio input and out rates should match or something..."

I am totally at loss. I reinstalled BIAB but the same issue still persists.

I haven't run biab in probably for 3 weeks since my last project. I was really caught off guard by this today.

frown