Some songs don't show up in Google Play Music on phone? Before I start, no this is not a duplicate of this question. They just happen to have similar titles.

Anyway, I wanted to listen to music on my Moto X smartphone. So like I have always done with every MP3 player and old phone I've had in the past, I just connected the phone to my computer with a USB cord, and then used Windows Media Player to sync the music files to the phone.

As far as I can tell, Google Play Music is the only app on the phone that allows you to play music files. So I opened the app up and set it to "Downloaded Only" in the sidebar menu. Then I went to "My Library," but to my surprise many of my songs weren't there!

With the phone hooked up to the computer I can look in the Moto X's "Music" folder, and all my songs that I synced are there. But inexplicably some albums don't show up in the Google Play Music app. Can anyone tell me why this is and/or how to get it so I can play these files? Thanks!
Android does not support many formats by its MediaPlayer library.
 Check http://developer.android.com/guide/appendix/media-formats.html to see if your codecs are supported.

If you don't use a player that features a custom decoder like PowerAMP‌​, you need to convert them to another format, preferably MP3 or FLAC if they are lossless.

Windows Media Player does have a way to change the default Media Copy format:


Go to Organize->Options
Switch to the Copy Music tab
Select the format you'd like from the drop-down list.
Select your preferred quality setting (in kBit/s, I recommend 256 kBit/s, because 320 kBit/s does not really add more quality for the bigger size)
Hit OK
Copy all the music!