Comment by foo_barrio

I believe "transparent" is the term used when claiming a lossy audio codec is indistinguishable to a lossless one by a human for some definition of an average human. For example I believe aac was considered transparent for most pop music at 160kbps for stereo, 16-bit @ 44.1khz (CD quality). So iTunes selling 192-256kbps was considered more than enough.