Pump up the treble
To compensate for hearing damage, I need to boost the treble in the left channel when listening over headphones. Do you know of a way to do this? Gareth Gilks The Equalizer in iTunes is fairly simple, and third-party apps that extend to all system audio apply the same EQ settings to both stereo channels. Very high-end software might enable this, but I think you’re better off with a hardware graphic equaliser. I’m not enough of an audiophile to recommend models, but a 15-band stereo graphic equaliser is around £75. Not cheap and the units are relatively bulky, but it’s really no more than decent headphones, and might be a worthwhile investment in your case.
Boom 2 is an inexpensive equaliser, but it can’t adjust left and right channels independently.