I have downloaded the paid version of Volume Control Widget- Equalizer. It's great! Thank you for the suggestion, JayJ!
So, I have been doing the right thing of shutting the music off. Maybe some day there will be a better way to do that....
Also, thank you for your suggestions of "saving as" on another post. It worked for the music files also. I have downloaded "ConverterLite" to help converting my .wma files to . m4a files for N7.
Thanks for the very helpful forum!!