Sony already has a high-resolution player in its Walkman line but, not wanting to sit out the growing audiophile craze, the company revealed another model here at CES: the Walkman ZX2. Inside the player's aluminum alloy frame, there's an S-Master HX digital amp to keep things sounding clear, and DSEE HX tech that upscales those regular ol' tunes (like those being streamed) for better sound quality. In terms of playback, the ZX2 handles media up to 192kHz/24-bit and MP3, WMA, AAC, FLAC, AIFF, WAV and ALAC including DSD files. There's 128GB of internal memory that's sure to fill up, but a microSD slot provides extra space. It'll connect to WiFi for streaming and downloads, and the battery is said to last 60 hours on a charge.