getzel1–
Instead of just regurgitating what I read, here are a few suggestions:
3) Potential solutions can be very different, depending on whether the basement currently has a ceiling or is exposed joists.
6) Mass Loaded Vinyl is another material that some people recommend as a component to soundproofing.
7) Different frequencies of sound are blocked more or less effectively, depending on what you do.
big deal–
Did you do the work yourself?
If so:
What method did you use? Existing ceiling, green glue, new sheetrock? New sheetrock, green glue, new sheetrock? Did you use sound clips? Insulation? Anything else?
If not:
Did you have it done professionally? Would you recommend the person or company that did it?