This is an issue that I believe exists for everybody, however I can't find a solution for it. Essentially, when trying to launch any version of Minecraft 1.6.4, when the new launcher came out, and below, there is absolutely no sound. Completely mute. That's really it. No crash logs, nothing unordinary, just no sound.
I am running 64-bit Java 1.8
There is no crashing, so a crash log is unneeded.