I am using the Etymotic ER4-P earphones with my IPOD. The midrange is excellent & the highs are very clear. I was using the Grado SR80 headphones. They also sounded great but are bigger to carry around. Also the Grados didn't play as loud as the Etymotic. Too much noise. The Grados IMO have better bass than the ER4-P. But the mids on the ER4-P are more detailed. I tried the ER6's and didn't like them. I would have stayed with my SR80s over the ER-6s. Once I heard the ER4-Ps I decided it was worth the improvement. I now can keep my IPOD volume at about 50% and hear everything fine.
I am using the AAC at 320. I originally recorded a few songs at 128, 192 & 328. I prefered the 320 and recorded at that setting. The 320 setting also reduced the number of songs I can record substatially but I was able put all my favorite CDs onto the IPOD. The AIFF uses too much space & will allow about 1000 songs. You can get information on the internet from Apples site. They bass the number of songs on an average song length of 3 1/2 minutes if I remember correct but I am not sure.
I am using the AAC at 320. I originally recorded a few songs at 128, 192 & 328. I prefered the 320 and recorded at that setting. The 320 setting also reduced the number of songs I can record substatially but I was able put all my favorite CDs onto the IPOD. The AIFF uses too much space & will allow about 1000 songs. You can get information on the internet from Apples site. They bass the number of songs on an average song length of 3 1/2 minutes if I remember correct but I am not sure.