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Originally Posted by andy_simpson  I'm sure there were some 'listening tests' done involving a trumpet recording, but I can't remember who did them. |
There was a report a few years ago in the AES journal with the headline claiming that absolute polarity is audible. But when you read the article, and especially the conclusion, the authors admitted it was barely perceptible and only on certain types of program material.
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Originally Posted by narco I made a saw tooth wave and flipped its polarity every second or so, there was an obvious difference. |
Yes, and I've done that too. But I hear no difference except at very low frequencies, where loudspeakers and headphones are not as linear. What frequency did you try?
Even if absolute polarity is barely discernible in a few situations, to me it seems a non-issue. Versus distortion or rolled-off highs etc that really do impact quality.
--Ethan