I got the same metallic sound as well, it was pretty funny as first because all my mates sounded weird. I dont know if it's part of the dose or just because your listening to a weird sound for ages and it makes ur hearing go weird.

I tried I-Doser about a year ago and nothing seemed to work for me. I had completly forgotten about and it asumed it didn't work but the other day a close mate said "have you heard of I-Doser" I said "yeh ive tried it before but I dont think it works" he replyed "na man i tr...