A Couple of Digital Recorder Questions

All, I have a couple of questions about recording with a digital voice recorder. I have an older Olympus DM-4 that is still in good condition. I have an iPhone 7 as well, but can probably not afford a really good external mic for it. I recently obtained a very good sound pair of in-ear, wired

any hints about the Amazon Music desktop player for windows

I'm trying to reliably play music, choose songs, with the Amazon Music Player for windows and it isn't going well. If anybody has suggestions, I'd appreciate them. Thanks in advance.