HTC Audio Manager, like WMP, requires the use of a library. This hogs memory, causing problems. One of many reasons why I prefer PocketMusic, which makes use of operating system DLLs instead of needing a library. Another reason for PM is that you can map music playing operations to buttons of your choice, which gives you better control, especially when in bright sun light which makes the screen hard to read, or while driving your car.
The full featured bundle version of PocketMusic is $19.95, but there's a fair lot of features in the free version. Both are available here...
http://www.pocketmind.com/pocketmusic.htm