When two or more instruments play a loud chord, the interference of the inaudible overtones from each instrument produce a distinct "ring" of audible difference tones, audible only at live gigs and on well reproduced SACD recordings. I've seldom heard the same effect to the same degree from a CD. Don't be fooled, this is a real and reliable enough effect for us classical musicians to use it to tune chords. This "ring" should be reproducible in 24/192 when these HF overtones in the stereo or surround channels interfere, which a CD cannot reproduce since there's nothing > 20kHz.

Granted, as mentioned in TA, the amp and speakers need to not be so rubbish as to introduce distortion > 20kHz.

Whilst I can tell in a blind test between the CD and SACD mode of the same disc of a recent BIS recording of Carmina Burana, it's only during certain passages of music where I am listening out for the difference tone "ring". Most of the rest of the time, I can't tell, and 16/44 CDs sound great. I don't think the fact that I am a classically trained musician matters.

That said, I think it's important NOT to be under the illusion that, just because you can't hear anything over 20 kHz (actually, ~16 kHz for most people), that there are no audible consequences when there is more than one channel.

In fact, given that well mastered vinyl played on good cartridges can reproduce fequencies to 60 kHz and beyond, this live "ring" may help explain why some folks still prefer vinyl recordings of classical music to the CD.

I meant that spending money improving teaching, while laudible, won't be as beneficial as spending money improving the home life of children by addressing poverty, domestic violence and healthcare, independent of schooling. Unfortunately this reality does not match up with the right-wing reality distortion field, so the chances of this boring truth getting any air time in the US is approximately naught.

Large quantitative HLM studies show that (the variance in) academic success at school is determined more by home life (social capital - upbringing basically, positive self concept) than by any other factor - the school, the teaching or genetics (although they are contributing factors). If governments - or indeed the Bill Gates Foundation - want to raise student results, then the best place to spend the money is to address poverty, domestic violence and healthcare.

T.S.Eliot wrote (in a play about religious decline, in 1933):

Where is the wisdom we have lost in knowledge?
Where is the knowledge we have lost in information?

Which is pretty much the tl;dr of TFA.

My thoughts: 1. SugarCRM, at least when I was using/hacking it (version 4.5 - 5), was an unmitigated pile of PHP spaghetti crapness. 2. They are a proprietary software company that periodically dumps a six-month-old, pared-down zip file of their code on a "community" of people who haven't realised they're wasting their time. 3. They use "open source" as a marketing gimmick to attract people who don't want to pay shitloads of cash for Salesforce et al. 4. They are not in the slightest bit interested in community contributed patches, code, or design ideas. 5. Periodic requests on the forums for access to their SVN repo are not even denied, it's all "oh yeah, we'll do that next week". And sorry, but all I've ever been able to get out of the vtiger developers is an inactive mailing list, a silent IRC channel, and one guy in India occasionally updating his blog with "went to some conference yesterday" every few weeks.

Because Apple along with a bunch of other large institutions earn MPEG-LA royalties for usage and implementation of H.264. If everyone stopped using it in favour of VP8 then that's a bunch of investment in patents wasted, and a bunch of future royalty income down the tube.

Telcos don't want interconnected community wifi spots all over urban areas, because everyone with a phone or laptop would bypass their precious mobile networks and use VoIP over Wifi instead.