Lot of nice posts here.
Measurements are needed for development, quality control etc. It would be impossible to design and produce equipment based only on auditory results.
Math is philosophy which is applied in measurements. Measurements quantify a set of known errors. Noise is assumed to be random. Depth of human perception have not as far as know been quantified. Thus measurements will tell what is wrong with equipment, not what is right, but is a good starting point.
Digital music formats introduced a new set of errors old systems were not adapted to.
Test signals are usually simple to make the math easy. That obviously does not paint a complete picture. How do you extract deviations in stochastic signals where complex intermods will happen?
Pseudo random noise with a swept -130dB notch source signal measured with a corresponding analyzer rejecting everything but the swept notch?
(I thought about that back in the early 70's but had no way to design and build it.)
How much, or more importantly exactly what, is tolerable to a critical ear?
Why not introduce quantifiable errors abd and guage their perceptability?
Measurements are needed for development, quality control etc. It would be impossible to design and produce equipment based only on auditory results.
Math is philosophy which is applied in measurements. Measurements quantify a set of known errors. Noise is assumed to be random. Depth of human perception have not as far as know been quantified. Thus measurements will tell what is wrong with equipment, not what is right, but is a good starting point.
Digital music formats introduced a new set of errors old systems were not adapted to.
Test signals are usually simple to make the math easy. That obviously does not paint a complete picture. How do you extract deviations in stochastic signals where complex intermods will happen?
Pseudo random noise with a swept -130dB notch source signal measured with a corresponding analyzer rejecting everything but the swept notch?
(I thought about that back in the early 70's but had no way to design and build it.)
How much, or more importantly exactly what, is tolerable to a critical ear?
Why not introduce quantifiable errors abd and guage their perceptability?