Can't hear music threw ear phones only can hear the mic threw earphones

Earphones are not compatable.

it is possible the equalizer is not working try to format it or just use a needle and press reset

Transfer mp3 files through Sonic Stage software in Sony NW-E307 mp3 player to get sound in its earphones
You can install Sonic Stage software from cd supplied with player or click Sony Support to download it by selecting OS in your computer in drop down list on that page.

Most often, the ear phone might be the problem.try getting a new ear phone preferable, one from another manufacturer,if it does the same way, the problem will be from the earphone port.

Try using the headset to listen to your iPod or MP3 player. Plug the USB plug into your Xbox or PC USB port, then plug the X1 green plug into the Headphones jack on your iPod or MP3 player. Make sure the master volume is up on the X1 (inline volume control box). Play a tune on the MP3 player. Do you hear the music? If yes, the X1 is fine. If no, you should contact Turtle Beach tech support and tell them about it.

I had the same problem with a Samsung phone. There are two ways of fixing this; First, you can remove the S9 profile from your phone's bluetooth list, and then add it again, going through pairing and entering 0000 on your phone when asked for the code.
Alternatively, you might try pressing the "play" button on the right earpiece on the Motorola S9. This is supposed to kick it into the A2DP stereo mode for music listening.
Good luck.
And get a copy of the manual from the Motorola web site at http://direct.motorola.com/ens/s9/Headset_Home.asp I found this very handy for checking what the little flashing lights mean. When you get stereo reception, the little LED in the middle of the headset flashes green, not the usual blue and red and purple for voice calls. 
In case you didn't know, as a phone headset, with the microphone activated, you only get sound in your left ear, and the light flashes blue. For music, you get both ears, and it flashes green. So if it ain't green, you are in mono mode.

I have this problem all the time with my JVC earbuds. This may sound a little gross but it will work. I put the ear phone in my mouth and **** on the end of it pretty hard. What I have found is that sweat or even wax will plug the little hole and prevent the sound from coming out.

mine is XP , if i keep ear phones in the laptop still i get sound from the main speakers....

I guess this is a common problem huh. No worries!

First: Click on your music button and play a song as you would normally do on your phone (make sure your speaker is on during this point).

Second: Click on the speaker button so you can listen to your music through your ear piece (as your music is still playing). If you don't hear your music through your ear piece wait until you hear it. It shouldn't take more than a minute. (Your music should be playing throughout this whole process)

Follow these steps every time you come across this problem.

If this solution resolved your problem, please leave a comment and a good rate. Thank you!