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Topic: Question - advice on dither  (Read 5778 times) previous topic - next topic
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Re: Question - advice on dither

Reply #25 –
Quote from: greynol on
controlled in such a way that the use of dither is the only variable.

I am not an expert but this can be done by comparing the SoX FLAC created with and without dither - if this is not enough more sophisticaed methods are probably too difficult for him to conduct.

Re: Question - advice on dither

Reply #26 –
That way should be fine.  If a difference is heard then further testing would need to be conducted in order to determine if either are distinguishable from the original.  It is possible that they sound different from each other but neither sounds different from the original, however.

Re: Question - advice on dither

Reply #27 –
Quote from: greynol on
That way should be fine.  If a difference is heard then further testing would need to be conducted in order to determine if either are distinguishable from the original.  It is possible that they sound different from each other but neither sounds different from the original, however.

Thank you. It seems that audio science can get a little bit complicated sometimes ;-)

Re: Question - advice on dither

Reply #28 –
I only said it was a possibility.  I have no idea how likely it would be.  But since there's already been some hand waving in the discussion I thought I'd drop that in.

I'm doubtful he'll be able to distinguish the dithered version from the non-dithered version.

Re: Question - advice on dither

Reply #29 –
Alright. I will speak to him and we'll see how he evaluates the results.

Thanks for advices!

Re: Question - advice on dither

Reply #30 –
Personally I don't really care about 16-bit dithering. I can only hear noise if I use a very high volume or if the file is recorded in very low volume.

Orchestral recordings can have low volume passages but breathing, coughing, paper flipping, mic noise and other ambient noise are much louder than the dither noise themselves, think about 4:33 for orchestra.

Maybe some experimental synth music can have very very low level which can benefit from dither but if it is audible then it also means it will be painfully loud in loud passages which will overload my ears so it is also a kind of distortion.

Apart from the test files in the Upload forum here are some other dither audio samples:
http://audio.rightmark.org/lukin/dither/

The sample files are amplified as well, it actually means 16-bit dither can hardly make any audible effect in real life in their original volume, especially when masked with louder signals.

Try Ethan Winer's dither challenge below. Can you tell which file is dithered?
http://ethanwiner.com/dither.html

Not to mention noise shaping sometimes can yield harmful consequences as well:
http://www.hardwareheaven.com/community/threads/kx-vs-creative-audio-quality-1-0-why.113346/

Re: Question - advice on dither

Reply #31 –
Quote from: bennetng on
Not to mention noise shaping sometimes can yield harmful consequences as well:
http://www.hardwareheaven.com/community/threads/kx-vs-creative-audio-quality-1-0-why.113346/
Can you please explain? Noise shaping is part of delta-sigma DACs and the noise should not rise in the audible range.
Is troll-adiposity coming from feederism?
With 24bit music you can listen to silence much louder!

Re: Question - advice on dither

Reply #32 –
Quote from: Wombat on
Quote from: bennetng on
Not to mention noise shaping sometimes can yield harmful consequences as well:
http://www.hardwareheaven.com/community/threads/kx-vs-creative-audio-quality-1-0-why.113346/
Can you please explain? Noise shaping is part of delta-sigma DACs and the noise should not rise in the audible range.
You are correct, but it seems that you didn't read my link carefully, otherwise you will not reply in this way.