This decoder is INCREDIBLY useful. I cannot directly attach example files here, but I have an available repsitory for your review. It makes a huge difference where many 'flattened' and 'shril' digital recordings can be corrected to sound almost like the old vinyl LP (or nearly so.) This is a tool that has been needed since the 1980s, but CPUS have only gotten fast enough to do the decoding super well perhaps in the middle 200X (maybe as early as 2001.) The current decoder goes far beyond the minimum, so works a Haswell (moderately recent performance) type CPU pretty hard.
This is NOT snake oil, and this is not any kind of payware and nagware. Almost anyone (not everyone --but by far most) who have given the decoder a real look-see are giving pretty much rave reviews.
THIS REALLY UNDOES MOST OF THE HISTORICAL SHRILL DIGITAL SOUND -- and even I am amazed that this hasn't been found out until now. This is NOT simple EQ of any kind, but kind of the opposite of a compressor with VERY special characteristics.
There are two simple A/B examples -- Bread-demo-after.mp3, Bread-demo-before.mp3 AND Queen-demo-after.mp3, and Queen-demo-before.mp3. There are also other, good examples, but might take more time.
It is best to listen to the 'after' cases first, because the ear seems to get used to the shrill and flat sound. The decoder even helps a little with the stereo depth. The sound of DolbyA is somewhat similar to undecoded DolbyB -- but probably worse, and the amount of NR is between 10 and 15dB. THIS TOOL IS NOT AN EQ or some kind of elitist magic -- the technology is well known, but for some reason until now not properly implemented in SW. (It is DEFINITELY possible to implement, even with patents describing techniques other than my own.) Some experts have poo-pooed the idea that there is a DolbyA that works in software, but most have not tried this one.
The archive location (and software distribution if you are interested) is at:
https://spaces.hightail.com/space/tjUm4ywtDR
Again, this software is NOT for sale, but available gratis to consumers, and will probably eventually be modified for graphical and/or other form useful to consumers and professionals. This tool is a barebones command line application, and really works well. It can use standard .wav files at normal sample rates, and with normal kinds of formats (16bit, 24bit and floating point.)
The result is very often a LUSH sound with depth -- similar to what one feels with vinyl (but maybe without some of the advantages and many of the disadvantages of vinyl.) Up until now, I also have often been disappointed with 'digital' sound. I quit the hobby many years ago because to me the sound made listening unenjoyable.
This program does NOT invent a sound, but only makes the sound much closer to the original intent of the artist and engineer.
This decoder can be very useful to those with archives on Intel-style computers (for now), and will probably be implemented in a more commodity form in the future.