Long-awaited streaming support. Thorough noise countermeasures by reinforcing and stabilizing the power supply, digital block power supply, and grind. Internal design that minimizes sound quality reduction so that the digital block does not adversely affect the analog flocking. Aluminum is used on the back. The one-piece aluminum design has achieved even higher rigidity than the previous model. New gold solder and hand-applied solder for the ultimate in sound quality. The headphone cable for the internal balanced output uses a 4-core Kimber cable. This cable blocks external noise and transmits high quality audio signals. FTCAP3 is used for all bypass capacitors in the audio block power supply. Further tuning of the internal structure of the capacitors. Improved vibration resistance, utilizing development know-how from home-use stationary audio equipment, contributes to improved sound quality. In the low phase noise oscillator, the electrode of the crystal piece is formed by gold vapor deposition. DSEE Ultimate/DSD remastering engine AI (Artificial Intelligence) technology, which learns vast amounts of music data, analyzes music scenes in real time and upscales them to optimally high sound quality. AI (Artificial Intelligence) technology automatically identifies song types and further improves the reproduction of fine sounds in addition to high frequencies. Advanced upscaling technology for CD-equivalent lossless codecs (Flac 44.1kHz/48kHz). The DSD Remastering Engine converts all input PCM sound sources into DSD signals equivalent to 11.2 MHz. Sony's proprietary algorithm converts the data to a DSD signal without losing the information content of the original data. The DSD frequency has evolved from 5.6MHz in the previous model to 11.2MHz. Enhanced battery life. Up to 40 hours of continuous playback is possible.