A few days ago I started up a thread on DIYA to talk about some of the progress I'd made on digital systems design with a primary focus on sound quality (rather than measurements). Its here:
The thread got beseiged by trolls of objectivist persuasion (people who take measurements as primary guarantees of audio quality) and then when it was subequently cleaned up by a mod the overall balance had clearly shifted in favour of the trolls in that some trolling posts were left behind but my rebuttals to those were deleted. Hence I've decided to continue the saga in the more conducive environment over here at WBF.
For those who aren't so interested in the earlier thread, the idea is to present some digital design principles, but also examples of designs which employ those principles. There will be schematics because DIY is the ultimate way to get a frugal system Nothing beats DIYing in terms of value for money.