Shimmer and sound problem, HELP

[David Spangler]

I have S4 and everything was working OK then one day I went in to fine tune some of my songs and I started having problems. A couple of my songs would start OK then the the sound would get messed up by sounding like it was in a barrel, fadding out, and disappearing altogether. Then I also noticed the shimmer stopped working  on all the songs. I can't remember making any changes. I thought at first, computer sound card but outside of LOR everything works OK. I checked to see if the twinkle worked and that is OK. Then I restarted everything and one song cleared up but another one was the same. I am starting to freak out. Time is short, Anybody have any ideas???????????

[David Spangler]

Found the problem thanks to DevMike It was my video driver was out of date.