Wouter
New Head-Fier
- Joined
- Aug 17, 2011
- Posts
- 17
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- 11
Quote:
My stereo deck has USB Direct Control so I just control the Walkman via my deck. The sound difference between USB and the AUX ports are miles apart. Crutchfield explains why: "The music signal remains in a digital form until it gets converted into an analog signal by your stereo, so no unnecessary manipulations are made to it. USB doesn't limit the frequency response or signal-to-noise ratio of the music, so what you hear is exactly what you have stored on your music device. It would seem that auxiliary and USB inputs should deliver the same quality of sound, but frequently, they don't. One reason is the difference between the digital-to-analog converter (DAC) in your stereo compared to the converter in your music player. The DAC in the stereo is going to be superior to the one in the music player because car stereos have the power and speakers required for bigger, better sound, so the DAC has to be able to reproduce a high-quality signal. Portable music players on the other hand, are designed to make small earphones sound pretty good. When you use your music player's headphone jack to connect to your stereo, that means you're using the music player's DAC, so the music isn't going to sound as good as it would if you can connect via USB."
Thanks for your reply DigitalCurator. I'm well aware of the advantages of connecting a DAP via USB. Connecting it via USB to a home stereo, bypassing the internal DAC, may indeed improve sound quality (However I'm not sure the DAC of a car stereo would always be superior to the DAC of the DAP. Having to power speakers seems more a matter of amplifying than a matter of digital-to-analog-conversion. Connecting it via USB will definitely have less distortion than connecting it via AUX however.)
I was just surprised that the Sony Z series walkman seems to support this feature as it is Android operated and 'stock' Android does not support audio over USB.
My HTC Desire S phone e.g. has Android 2.3.5 and does not support audio via USB. In fact 'stock' Android 4.0 "ICS" still does not seem to support audio over USB (there is a thread about this requesting Google to add this feature). Apparently Sony modified the Android version they put on the Z in order to support audio over USB.