Does the UD-10.1 have 24-bit/96kHz digital output which can be used with hi-resolution 24/96 downloaded music?

No ! However, we would study the products. Just take a look at our site. However, you can try to hear the difference between 24-bit/96kHz digital output and Trends UD-10.1 + DAC, you would find out that Trends UD-10.1 is the very good USB transport to work with any DAC. Meanwhile, you may find out Trends UD-10.1 + DAC to provide a better performance than 24-bit/96kHz digital output