[size=large]My opinion about jitter[/size][size=large]:
[/size][size=x-small] I read some points about jitter, some people think if the DAC can avoid jitter, then any sources feeding to this DAC can get the same sound output regardless of whether the source is expensive or inexpensive. But in my experience, this is not real. The costly DAC also can't achieve .
In my experience, I have only tried one Chinese DIY DAC which can ignore sources and output the same sound. I tried to feed to it between a Marantz CD16K and a VCD player, this DAC output definitely had the same sound but I think it sounded worse than the VCD player's analog output.
The ES9018 claims it can avoid jitter, but I have experimented with it. I fed our NFB-7 from our CD-7FV or a DVD player, the sound is definitely different. While from the DVD player, the sound definitely degrades compared with the CD-7FV. The sound tone became flat, the sound stage much smaller than with the CD-7FV.
The jitter is not the only reason which can degrade sound quality, there are some other reasons which can degrade the sound quality. Like the clock phase noise, the SPDIF output waves form, even the dissension power cables and the coaxial cables. I just think, that jitter is the easiest of issues to unravel.
But on the other hand, if the DAC sound is not revealing, or for subjective reasons, users maybe can't hear the difference from different sources.[/size]