InvestorsHub Logo
Followers 34
Posts 7634
Boards Moderated 2
Alias Born 09/29/2011

Re: Urbanlegend post# 28300

Thursday, 12/13/2018 10:34:51 PM

Thursday, December 13, 2018 10:34:51 PM

Post# of 39825
Only listened to a few minutes of that clip, most of it is simply nonsense.

e.g.:

"What is resynthesis?"

'Resynthesis is a way that it analyzes an input, an audio input of some kind, and then attempts to digitally reconstruct that through phase, time and frequency manipulation."



Wow. Lots of buzzwords thrown into a salad that makes literally no sense.

My best guess for what the "Trammel process" actually is comes from this:

'Now if we could take a 128 mp3 for instance, even though mp3s are slowly getting phased out. We can that mp3, in real time analyze it, see what's missing, sort of decompress everything, put our process on it, correct all the phase anomalies, and all the nasty things that was added when it was compressed. And then they can recompress it as it goes out and change it to the exact same size as 128 mp3, but we sound more like the CD than a 128 mp3. And that's kind of bending the laws of physics a little bit, because you're not supposed be able to have the dynamic and the frequency range, but when you clean up a lot of the stuff, and you understand additive synthesis, there's ways to build all these harmonics back in there so it sounds just like it did before.'

"So you can do backwards compatibility?"

'Exactly.'



LOL. The BS in that clip really stinks up the place.

But I think the gist of it is: Trammel's process searches for frequent, displeasing distortions caused by poor and/or extreme MP3 encoding, and attempts to undo or counteract them with superior encoding techniques.

My guess it's analogous to if someone were simply upscaling a regular sound sample: e.g., Dithering an 8-bit sample requires noticeable hiss, but the dithering in a 16-bit sample can be nearly silent. If you convert an 8-bit sample to 16-bit sample, you now have the opportunity to remove that excess hiss. But the filter you use to remove the hiss could also remove parts of the original sound which are similar to the hiss. A skilled artist or a clever algorithm can do this for a noticeable improvement in sound, but it's a lie to claim you're "restored" the original audio.

Essentially, you've made an "educated guess" about what the original audio was + was not, but you can never know for sure.