I don't know what to use for downloading music to a gpx mw3847

http://www.gpx.com/owners_manuals/MW3847-IB.pdf
press button 12 R to cycle thru

http://www.gpx.com/owners_manuals/MW3847-IB.pdf I don't know if that's the one because you didn't specify the model

you probably need to change format to acc or mp3 i tunes can change for you

I contacted GPX. It's really easy.
With the left side button in the "off" position, press the "play/pause" button in the center of the circle for 3 seconds. It will then turn on. To turn off, do the same thing, and it will display "BYE" on the screen before powering off.
This was NOT in the instruction manual and they admit this was a mistake on their part.

This link shpuld get you to a website where you can download the manual for the MW3847


http://www.gpx.com/owners_manuals/MW3847-IB.pdf

go to my computer, go to your audio player drive, right click and click format under the available options, this will give you the choice to erase everything on your mp3.

First, you need to ensure that the switch on the side is set to OFF...

then if you have Windows Media Player 9 and (Windows 2000 and before ie Windows ME/98) ,
Second, Hit the M Button and Make sure that you have the player set to USB

but then if you have Windows Media Player 10, 11 (Windows XP, Vista)
Hit the M Button and Make sure that you have the player set to MTP

and if you have no Windows Media Player ...
Hit the M Button and Make sure that you have the player set to USB
copy your music mp3 files using windows explorer or my computer

I have a gpx mw3847 and I load songs by opening up My Computer, finding my gpx mw3847 and opening it. Then I go to MY Music where I have my MP3 songs and just drag or copy the ones I want over to my Player. I don't use Windows media player to load songs no any of my players

I have Vista and when I open MY Computer after I've connected my gpx mw3847 it shows up as GPX (F:). I did not format it. If I right click on GPX (F:), the drop down menu shows a FORMAT item there. But I can drag or copy songs to it without having to format it. The (F:) stands for the drive letter so yours might be different.

There might be an issue with your headphones. Are you using the same headphones with both players? If not, buy new headphones. If so, your port might be going out.