Maybe you'd say it's brighter... If the highs are reduced (excessively) I say "dull" and the opposite is "bright". I remember lots of vinyl records from the analog days sounding "dull" and when I occasionally digitize one that sounds like that I'll boost the highs a bit.
But usually if I say "dull" I try to remember to also say "rolled-off highs".
I try to be specific rather than using all of these vague words...
Some amplifiers (in the 1970s?) had a 3rd tone control. In addition to bass and treble, there was a midrange (or mid-high?) control called "presence". Now with multi-band equalizers you rarely see that. Occasionally you'll find a "presence" knob on a 3-way speaker and it adjusts signal to the midrange driver.
These words often have more than one meaning. I used to think "warm" is a mid-bass boost but some people say "warm" to describe slight "pleasing" distortion. So again, now I just try to avoid the word.
When someone says "detail" I think of high frequencies. But Dan Clark (headphone manufacturer) made a video where he said that when a headphone as more distortion it's often described as "more detail". That surprised me! It would be nice to say "distortion" if that's what you're hearing but I guess most listeners can't tell that what they are hearing is actually a particular kind of distortion...
Agreed ... so what is so called resolution in audio world. You hear louder sound in certain region of response? One speaker produce less while others more?
It's another commonly misused word.
Technically, resolution in the digital domain is related to bit depth. With 8-bits you have 256 "steps" between zero and maximum. With 16-bits you have 65,336 steps and with 24-bits there are 16,777,216 steps. The numbers in a 24-bit file are bigger, but it's not louder there is just more resolution. When you play the file it's scaled up or down to match the resolution of your DAC.
If you play an 8-bit file the loss of resolution is heard as quantization noise which is like a fuzz on top of the signal. It's a lot like analog noise in-that it's most noticeable with quiet sounds but unlike analog noise away it goes away completely with digital silence. A lot of people talk about audio resolution without knowing what resolution sounds like, and if it's 16-bits or better they're probably not hearing what they think they are hearing.
BTW - DACs have a smoothing filter so the analog output is continuous analog with no "steps".
I don't know if there are any DACs with
true 24-bit resolution. 18-20 bits seems to be about the best you can get with the last few bits being unstable (noise).
With analog, resolution is related to noise which is randomness or uncertainty. A lot of people think analog has infinite resolution because it's smooth and continuous and there are no "steps". But there is random constant noise and variation.
With digital photos or video, lower resolution has bigger pixels.
With analog photos or video low resolution makes the image "grainy".