To be fair.... as I said, it's not the easiest way....
You make a 6 channel wave of laser signals in LaserBoy and you splice a stereo audio wave with it to make an 8 channel wave (also in LaserBay). You need to pay attention to the sample rates of both to be the same.
No. There is no time alignment editor or anything like that..... yet.
I'm still working out every last stinkin' sample that is necessary to make the most perfect optimization I possibly can. Once I have all of that, from beginning to end, I can work the numbers backward and make a laser show piece exactly the same number of samples as a segment of music.
It is also possible to use the free and OS independent Audacity to visually edit waves together and save them as a single 8 channel wave.
^It's a .wav file that maxes out the audio channels on a sound card DAC so that it can be properly tuned. With the channels maxed, you can then set the max output voltage on each channel. Once that's done the DAC is tuned and ready to go.