Global Feedback - A huge benefit for audio

Amen to both. But fidelity goes beyond measurable performance. There are certain subjective criteria that are straightforward and uncontroversial in listening tests, but are beyond available measurement. For example, stereo imaging, or ambience of a music hall. Faithful reproduction of micro detail.


At least you didn't mention DDR! Other than microdetail, everything else is fairly well understood with respect to the illusion the brain creates from the incoming data. The flat earth brigade like to believe there is some magic that cannot be measured, but I've yet to see any.
 
Amen to both. But fidelity goes beyond measurable performance. There are certain subjective criteria that are straightforward and uncontroversial in listening tests, but are beyond available measurement. For example, stereo imaging, or ambience of a music hall. Faithful reproduction of micro detail. To assume that such subtleties are predicted by relatively crude measurements betrays lack of understanding of what high fidelity sound reproduction is about.

This is nonsense.

If a well designed amplifier can produce signals over its whole dynamic range with fidelity then it can produce ‘micro detail’ and ‘ambiance‘.

You’re using hi-fi journo speak to try to describe (or is it obsfucate?) a technical point (accuracy, linearity). Please don’t do that here. The reason they use that talk in magazines is the vast majority are not technically qualified- believe me I know what I’m talking about - so they have to use terminology like that.
 
To say that consumer-oriented gear reviews are not valid because they are not written by engineers is same as saying that food reviews are not valid because they are not written by cooks. Both have their purpose and audience. And it is not all fraud as some believe.
 
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This can be explained without invoking brain. Two ears are like two small directional microphones. If you can evaluate level differences and time delays between the two microphones across the spectrum, you have information necessary to locate sound sources. Just need accurate measurements and some computing.
 
so go on, explain how a sound stage is created with 2 sources without bringing the brain into it?

You can't. Stereo is an illusion if there ever was one. we are all deluding ourselves when listening to stereo. Hint: there is no singer between the speakers ;-)

The big elephant in the room is perception. Everything you experience, perceive, has been heavily processed by the brain. That is also why your appreciation of music and your music system varies with how you feel and your 'body state', which influences the brain.

All this is well known stuff for anyone serious about music reproduction, but most audio diy-ers limit themselves to the hardware of the system, although the 'wetware' is the final arbiter of what you 'hear'.

Jan
 
A single one channel mono signal can contain no up/down or left/right information every speaker/room combination will create a different illusion. Any claim to the otherwise is extraordinary.

It may be similar to HDTV. When I first saw it, I was surprised how 3-d it was looking compared to standard definition. Similarly, high definition mono recording has some spacial cues that create semblance of 3-d effect.
 
This can be explained without invoking brain. Two ears are like two small directional microphones. If you can evaluate level differences and time delays between the two microphones across the spectrum, you have information necessary to locate sound sources. Just need accurate measurements and some computing.

... and who or what you think is doing the evaluation and computing ...?
And completely out of your control at that?

Jan
 
A single one channel mono signal can contain no up/down or left/right information every speaker/room combination will create a different illusion. Any claim to the otherwise is extraordinary.

Spacial cues in mono could be, for example, reflections of trumpet sound from side walls, back wall, and ceiling. Certain time delays and intensities of these reflections make kind of one-dimensional footprint of the instrument and microphone located at fixed positions in the hall.
 
Please re-read Scott's post above yours. The recording venue surely does color the sound, but with a mono speaker there is no spatial information in the sense that you can know the position of the sound source in the recording. It all comes from the single speaker.

Only in stereo you can trick your brain in thinking that there is *something* in the space between the speakers. The brain uses intensity and arrival-time differences between the ears to create a useful illusion.

Jan
 
One would think that this is absurd and could not be true, but the industry has actually adjusted to this and makes good money off of them.
Only fools are easily parted with their money 😉.
But there is no objective evidence for good measurements correlating with good sound. Their is faith, nothing more. You ridicule subjectivists for their faith, without noticing that you are as ridiculous with your objectivist faith.
Unless it is a guitar amplifier, hence a relevant part of the musical instrument, hence a sound producer, aka FX machine, an amplifer doesn't need to »sound« at all. Neither does it need some »sound signature«, as some stated here or in other threads. The ideal high fideltiy amplifier is the wire with gain. It doesn't add or omit anything to/from the input signal, neither colourizes it.
Best regards!
 
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