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bob katz · 25th December 2007, 09:00 PM

Dear Ethan:

I also suggest you find the article: "Subjective Evalation of Large and Small Impairments in Audio Codecs", by Gilbert A. Soulodre and Michel C. Lavoie. From the AES 17th International Conference on High Quality Audio Coding. The authors compare the BS.1116 method versus other sensitive methods and more relevant to your proposal---- one of the tests they conducted involved having subjects judge "audio impairment" when calibrated amounts of noise was added to material.

They then measured statistically with error bars the subject's results and came up with a test methodology that is extremely sensitive.

In the end, if you are trying to judge "how subtle dithering is", you have to perform the test correctly!

BK

25th December 2007, 09:00 PM	#54
bob katz Mastering Join Date: Mar 2006 Posts: 1,826	Dear Ethan: I also suggest you find the article: "Subjective Evalation of Large and Small Impairments in Audio Codecs", by Gilbert A. Soulodre and Michel C. Lavoie. From the AES 17th International Conference on High Quality Audio Coding. The authors compare the BS.1116 method versus other sensitive methods and more relevant to your proposal---- one of the tests they conducted involved having subjects judge "audio impairment" when calibrated amounts of noise was added to material. They then measured statistically with error bars the subject's results and came up with a test methodology that is extremely sensitive. In the end, if you are trying to judge "how subtle dithering is", you have to perform the test correctly! BK __________________ Bob Katz DIGITAL DOMAIN http://www.digido.com "There are two kinds of fools. One says-this is old and therefore good. The other says-this is new and therefore better." No trees were killed in the sending of this message. However a large number of electrons were terribly inconvenienced.