Help! How can I help my colicy 8 week old stay asleep?

Babies who don't sleep well always sleep better with soft music or a noise machine. The white noise setting and others remind them of noises from when they were in the womb and therefore help them sleep. Plus it drains out other noises that are going on around them that may be waking them up. I hope this helps. It works with the babies that I take care of! :D