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FLAC / Re: FLAC v1.4.x Performance Tests
Last post by bennetng -
It is pretty easy to kill -e too. The plot is configured in a way that signal below 16-bit noise floor appears black:

23.6 GB (25365043448 bytes)

23.5 GB (25329260329 bytes)

-8b8192 -A "subdivide_tukey(3);blackman"
23.4 GB (25181478740 bytes)

So, a 16/176.4 conversion using shaped dither makes -e a waste of time.
Other Lossy Codecs / Re: Descript Audio Codec (.dac) - 90x smaller than .wav?
Last post by Porcus -
90x smaller than wav, huh?  Assuming they mean 16/44.1 PCM wav files, that'd be somewhere in the ballpark of 16 kbps, right?
Yeah, except: the sample files are mono.
So that means CDDA encoded at 16 kbps as dual mono, without any stereo decorrelation strategy. I have not bothered to look up whether they have any stereo decorreleation algorithm (yet), but obviously that is room for improvement - and also an opportunity to spend more processing power.

I'm going to go out on a limb and say it either sounds bad
Well you can test it ... ? Although the samples are not that interesting ...
or is completely impractical for most use cases.
As of now? Sure.
Other Lossy Codecs / Re: Descript Audio Codec (.dac) - 90x smaller than .wav?
Last post by przemyslawo -
Python is slower than compiled languages such as C++ or Go:

But efforts have been made for speeding up Python, such as Codon compiler:

I don't know if Python code would be that slow on a GPU as well as in a CPU, but it would be awesome to have this codec compiled through LLVM.

Codon is still not ready to compile 100% of Python code. But the developers are working to implement the missing features such as metaclass support.
Other Lossy Codecs / Re: Descript Audio Codec (.dac) - 90x smaller than .wav?
Last post by C.R.Helmrich -
... it's made a 40MB exe ...
This does not include the weights file which is ~300MB. The weights file contains the model data used to encode and decode the audio and is a necessity, and the model is not interchangeable. You have to use the same model to decode any encoded file.
Thanks for the analysis! Out of curiosity: could you 7zip (preset Ultra) that 40MB exe and 300MB weight file and let us know what file size comes out? That would be a rough estimate of how much room for reduction there is.