Shadorne,
I stand corrected. I should not have described the shift in velocity as instantaneous. That would be a near digital event. I was thinking of an instant in time where the velocity has shifted slightly higher causing the 1000 hz to appear as 1005 hz. I am certainly aware that all deviations from true linearity are generally smooth transitions. (A kind of bend or warp in the shape of the sine wave.)
This brings me back to my earlier attempt to describe a 2khz measurement from a 1khz fundamental. The shape of the sine wave will have to have at least a portion of its rise or fall time doubled in speed. That is a considerable bend in the shape to be seen by the THD analyzer as twice the frequency (harmonic).
If you can reduce the bending and warping to a fraction of that amount you can limit the distortion to one of mere phase shift instead of frequency shift. Instead of the energy sliding up the spectrum to 2khz - it only moves slightly up the spectrum and is limited to a region at or around the fundamental frequency. (1005 hz)
If you can detect the START of this deviation AS IT HAPPENS and correct it on the fly it will never have a chance to inflict damage on the final acoustic output. Dealing with this issue while it was reduced to phase errors instead of frequency errors is why the system I developed is a Doppler control system. The entire complex musical event is phase locked to the fundamental (primary) image. As a result it has a massive stabilizing effect on the perceived location of sound objects and is totally transparent.
Roger
I stand corrected. I should not have described the shift in velocity as instantaneous. That would be a near digital event. I was thinking of an instant in time where the velocity has shifted slightly higher causing the 1000 hz to appear as 1005 hz. I am certainly aware that all deviations from true linearity are generally smooth transitions. (A kind of bend or warp in the shape of the sine wave.)
This brings me back to my earlier attempt to describe a 2khz measurement from a 1khz fundamental. The shape of the sine wave will have to have at least a portion of its rise or fall time doubled in speed. That is a considerable bend in the shape to be seen by the THD analyzer as twice the frequency (harmonic).
If you can reduce the bending and warping to a fraction of that amount you can limit the distortion to one of mere phase shift instead of frequency shift. Instead of the energy sliding up the spectrum to 2khz - it only moves slightly up the spectrum and is limited to a region at or around the fundamental frequency. (1005 hz)
If you can detect the START of this deviation AS IT HAPPENS and correct it on the fly it will never have a chance to inflict damage on the final acoustic output. Dealing with this issue while it was reduced to phase errors instead of frequency errors is why the system I developed is a Doppler control system. The entire complex musical event is phase locked to the fundamental (primary) image. As a result it has a massive stabilizing effect on the perceived location of sound objects and is totally transparent.
Roger