Audacity Forum

Did some suggested fixes, but not all so far... Added --input/--output, the program will bounce non-stereo files, etc. Clarified the use of the 'double dash' in documents. The only thing not handled is the several thousand sample loss/delay. The program does account for every sample, so something is...

I'll check the harmonic distortion thing right away. It appears to be due to an amount of positive gain on the high level 1 kHz sine, which pushes the waveform into clipping if the input level is too close to 0 dB. As I mentioned in the previous post, that exactly emulates a real DolbyA unit. Using...

Regarding the 'distortion', I have a full answer for you, and you happened to show that it is working EXACTLY the same as the DolbyA unit that we developed the curves for. Here are the details: If you provide a 0dB input at 1kHz, the decoder will provide a +0.33dB output. I assume that signed intege...

Okay -- I'll check the harmonic distortion thing right away. Any kind of fast compressor/expander like this will have some odd distortion characteristics -- even though in encode/decode they don't have much distortion. I'll verify the cause at least. Audibly, it has less distortion than either a sat...

I'm getting: $ ./da-avx -thresh=-15.50 input.wav output.wav LEFT-RIGHT dBthresh: (-15.50,-15.50), dBingain: ( 0.00, 0.00), dBoutgain: ( 0.00, 0.00) Cannot do audio input from tty Failure to start -- input file is incompatible The problem that you are having is exactly the kind of problem that happe...

Luckily, nowadays much older music (e.g. from HDtracks and other good sources) sell recordings that are 'close to' DolbyA encoded. What's "lucky" about that? As you said yourself, software Dolby A decoders are rare, so it would certainly not be "Greatest-Sounding Music Downloads", as HDtracks adver...

Look -- I wasn't talking about those people on the early part of the real creative process -- I am talking about the person who takes the 20-25dB long term dynamic range tape (still very compressed -- like ABBA), and then changes that into a 6dB or less dynamic range. People that you are talking abo...

The killer problem with that 'remastered' version is that it is so very compressed/limited, there is not much dynamic range EVEN for an expander (a kind of partial correction for a compressor) to be able to work with. Music that is so very compressed/limited like that just does NOT make sense. To gi...

DolbyA appears to sound like a compressed, HF intense version of ideal. Frankly, it doesn't seem all that much worse than DolbyC -- just compressing LF, MF and HF in two different attack/decay rate pairs. The attack/release times aren't bad enough to terribly intermodulate with the audio (it does a ...

If you are looking to remaster a commercial release, I have found that it is best to try to bring it back down to pristine. Luckily, nowadays much older music (e.g. from HDtracks and other good sources) sell recordings that are 'close to' DolbyA encoded. I think that they just might be running off m...