Jeeze man..THere is a drug like that. ITs called LSD.
Take LSD and listen to music with headphones on. You will have insane visual distortions.
But I guess you mean a drug that mainly effects your hearing.
Sounds rediculously awesome!
Something exactly like methamphetamine (but without the tolerance, addictiveness, and withdrawals) would be grand.
I suppose one can only dream...
something that replicates the feeling of waking up in the morning. when you are covered in warm blankets and your brain is foggy. everything is soft and warm and nothing really matters. you fade in and out of sleep and dreams flow easily.
something like that with no addictive properties...
Stronger version of MDMA.