Being able to play your own tunes on a tiny digital contraption is nothing new yet compressed (MP3) files are robbing music of emotion and depth. The solution is hi-res digital audio and one particularly accessible and user-friendly system is the 3,500 USD Astell & Kern SP1000 from South Korea. It’s a beautifully made portable audio product with an eight-core processor that plays files of up to 32-bit/384kHz quality – that’s enough to satisfy even the most demanding audiophiles.