I currently using an iPod Classic as my primary music source. I am quite happy with it but planning for a future in which it dies, is lost, etc. One route that I am considering is using my Android phone (Samsung S7). I was concerned about the quality but I have managed to connect the phone to my AVR to my satisfaction. Now, I need to find a suitable player app. The reason that classical music is significant is that most players seem to be optimised for popular music and they do a poor job of organising classical music. For example, most apps assume the album is a significant unit. For classical music, it often isn't. It is quite common that one CD contains two or more different pieces of music e.g. Beethoven Symphonies 5 and 6 and, quite often, utterly unrelated ones. Even if I want to hear those pieces in succession, I would want a greater pause between the two symphonies than between the movements of one. In the other direction, some pieces are larger than one disc and they are split at an arbitrary point. iTunes also handles this badly and the way that it organises the discs into folders is horrible. I ignore this and create lots of playlists. So, if the CD contains multiple pieces, I create a playlist for each. If the piece stretches across multiple discs, then I create a playlist which spans all of the discs. I also create playlists with themes e.g lots of string quartets. So, one piece may appear in multiple lists. As a result, I have a huge number of playlists (thousands, no exaggeration). Fortunately, I can organise them into folders. Here's an example: I want to listen to Beethoven's 3rd symphony. I select folder Classical (I have some other genres), I select B (there are loads of composers so that helps), I select Beethoven, I select Symphonies, I select an orchestra (I have three versions of all symphonies), and finally I select number 3. So, I need that flexibility from an app. Another different requirement is not to lose even a second at the start. Some apps seem to slightly clip the track at the start. Perfect gapless playback. In classical music, usually each movement is a separate track but often they are played without a break. Occasionally. a track is portion of a movement. Some players seem to struggle with this.