about voice i made blog post earlier, post about emerald, but works almost same with cool viewer also.
1) download official viewer from Lab, 1.23.5 or Snowglobe.
2) open application with right click (or ctrl-click if you on apple laptop with one trackpad button) -> show package contents
3) copy SLVoice libalut.dylib libllkdu.dylib libopenal.dylib libortp.dylib libvivoxsdk.dylib files from Contents/Resources folder to same folder in your cool sl viewer.app
4) enjoy voice and raised video performance.
original blog post see there
http://hyangreflections.blogspot.com/20 ... ewers.html