Atmasphere,
Ok here we go lets start with your first comment. I will try to use straight simple answers.
09-26-08: Atmasphere
Roger, 1/100th of a db? Really? So if the change in pitch cannot be detected by **musical instrument** tuning devices (which are quite sensitive, much more so that any frequency counter I've seen), it follows that it cannot also be heard by the human ear, but you say it can. How do you square your apparently contradictory statement?
Do you realize what you have just concluded?
If you cant measure it you cant hear it.
Any audiophile worth his salt will tell you that measurements and sound dont always add up.
You say that if it cannot be detected by [equipment] then it follows that it cannot also be heard by the human ear
Do you really believe that?
You would rank the human ear made by God in the same category as man-made test equipment?
NEXT -
The **amplifier** is changing gain? What is the mechanism for that?
Its called distortion. Simple non-linearitys that cause the amplification factor to deviate from a constant ideal value.
1) How have you measured this effect to prove or disprove your hypothesis and add what outcomes does it suggest?
I dont.
2)Given that a change in the speed of the amplifier has produce no measurable result, how were you able to test your hypothesis?
I listen.
3)For a given change in gain, say 20 db, over a period of 1/2 second how much change in pitch will be measured?
Cant measure it remember. But I do use a simple binary logic.
Smeared = bad
Clear = good
4)How do you measure Doppler effect in an amplifier?
Sorry - Still cant measure it.
5)What is the unit of measure?
Fractions of a degree / fractions of a db.
6)What test equipment do you use for this?
Nobody makes equipment to test this.
7)How much DE is reduced by your circuit?
Significant amounts verifiable via listening.
8)IME again, I have found that the measurable propagation delay in an amplifier circuit does not change with the input level. How do you square this with your hypothesis?
Actually with a fixed or constant input level applied the propagation delay will vary as signal goes through its 360 range. What your are reading with your test equipment is a worthless average.
9)Does your hypothesis support exceptions or does it predict that the experience of perspective is universal?
Changes in perspective were not my intention regarding the concert hall analogy just the relative distance from the stage based on the 3 seating positions and the necessity to move between them to alter the pitch.
10)Since when listening I am usually seated, why exactly should I care if there is Doppler effect if I move?
You will not hear / notice Doppler by simply moving around in your living room unless you are running VERY fast. Again the reference to the concert hall was to illustrate changes in gain you would implement via your volume control (rapidly) the physical equivalent would be a very brief jump" from seat to seat at which time you would hear a change in pitch. (Doppler).
11)In a real life situation, would you not also experience Doppler?
We experience it all the time.
12)It seems to me that you would want to preserve the Doppler effects of real life music. true/false?
True the same as you would want to preserve harmonic overtones that originate from the instruments.
--
Hope this has been of some value to you.
Regards,
Roger
Ok here we go lets start with your first comment. I will try to use straight simple answers.
09-26-08: Atmasphere
Roger, 1/100th of a db? Really? So if the change in pitch cannot be detected by **musical instrument** tuning devices (which are quite sensitive, much more so that any frequency counter I've seen), it follows that it cannot also be heard by the human ear, but you say it can. How do you square your apparently contradictory statement?
Do you realize what you have just concluded?
If you cant measure it you cant hear it.
Any audiophile worth his salt will tell you that measurements and sound dont always add up.
You say that if it cannot be detected by [equipment] then it follows that it cannot also be heard by the human ear
Do you really believe that?
You would rank the human ear made by God in the same category as man-made test equipment?
NEXT -
The **amplifier** is changing gain? What is the mechanism for that?
Its called distortion. Simple non-linearitys that cause the amplification factor to deviate from a constant ideal value.
1) How have you measured this effect to prove or disprove your hypothesis and add what outcomes does it suggest?
I dont.
2)Given that a change in the speed of the amplifier has produce no measurable result, how were you able to test your hypothesis?
I listen.
3)For a given change in gain, say 20 db, over a period of 1/2 second how much change in pitch will be measured?
Cant measure it remember. But I do use a simple binary logic.
Smeared = bad
Clear = good
4)How do you measure Doppler effect in an amplifier?
Sorry - Still cant measure it.
5)What is the unit of measure?
Fractions of a degree / fractions of a db.
6)What test equipment do you use for this?
Nobody makes equipment to test this.
7)How much DE is reduced by your circuit?
Significant amounts verifiable via listening.
8)IME again, I have found that the measurable propagation delay in an amplifier circuit does not change with the input level. How do you square this with your hypothesis?
Actually with a fixed or constant input level applied the propagation delay will vary as signal goes through its 360 range. What your are reading with your test equipment is a worthless average.
9)Does your hypothesis support exceptions or does it predict that the experience of perspective is universal?
Changes in perspective were not my intention regarding the concert hall analogy just the relative distance from the stage based on the 3 seating positions and the necessity to move between them to alter the pitch.
10)Since when listening I am usually seated, why exactly should I care if there is Doppler effect if I move?
You will not hear / notice Doppler by simply moving around in your living room unless you are running VERY fast. Again the reference to the concert hall was to illustrate changes in gain you would implement via your volume control (rapidly) the physical equivalent would be a very brief jump" from seat to seat at which time you would hear a change in pitch. (Doppler).
11)In a real life situation, would you not also experience Doppler?
We experience it all the time.
12)It seems to me that you would want to preserve the Doppler effects of real life music. true/false?
True the same as you would want to preserve harmonic overtones that originate from the instruments.
--
Hope this has been of some value to you.
Regards,
Roger
