Requesting help from Dr. Geddes, or other experts

[Key]

I guess I tried to make it clear. I gave two examples that I thought were simple enough for you to see what I was getting at - all pass applied to one channel of a stereo signal, and a mismatched polarity between a stereo set of speakers.

All I was trying to do was point out that exact detail with the thread. It's HOW you distort the time which can make it audible. I kept seeing the figure 6 microseconds thrown around without any specific qualification of that time margin. I tried pointing it out to them that errors which happen on only one side of your head and not the other are much much easier to spot than errors which happen equally to both sides of the head.

Having someone with your credibility entering the thread and just say something which is at complete odds with what I was proving to myself and trying to give an opportunity for others to prove to themselves. It forced me to do a little side track. I thought "oh someone will listen to this and say "well that's obviously audible compared to the symmetrical distortions"" and we could move on. But you simply didn't want to get what I was saying or just thought it was tainted and waste of your time. That's fine and all but I personally think that someone could walk away from that thread siding with you - much more credible than me - and they would be very wrong in that conclusion.

[gedlee]

Originally Posted by Key

I guess I tried to make it clear. I gave two examples that I thought were simple enough for you to see what I was getting at - all pass applied to one channel of a stereo signal, and a mismatched polarity between a stereo set of speakers.

All I was trying to do was point out that exact detail with the thread. It's HOW you distort the time which can make it audible. I kept seeing the figure 6 microseconds thrown around without any specific qualification of that time margin. I tried pointing it out to them that errors which happen on only one side of your head and not the other are much much easier to spot than errors which happen equally to both sides of the head.

Having someone with your credibility entering the thread and just say something which is at complete odds with what I was proving to myself and trying to give an opportunity for others to prove to themselves. It forced me to do a little side track. I thought "oh someone will listen to this and say "well that's obviously audible compared to the symmetrical distortions"" and we could move on. But you simply didn't want to get what I was saying or just thought it was tainted and waste of your time. That's fine and all but I personally think that someone could walk away from that thread siding with you - much more credible than me - and they would be very wrong in that conclusion.

If thats the case then I appologize because that was not what I understood nor what I intended to do. When I saw the words "symmetrical distortions" this means something very precise to me, but its not what you meant. So this was all a misunderstanding. You meant symetrical from channel to channel and to me it means from plus to minus on the waveform - completely different things. One is highly audible and the other is not.

It's always difficult to jump into a thread and know exactly what is going on. Specifically when the terminology can differ from thread to thread. You (I) think that you understand but you don't.

[Key]

I was pretty certain that it was a misunderstanding in that case. And I wasn't exactly mad or anything about it. I did get a little angry when it seemed like you were sighting it as an example of me being stubborn. Anyway apology accepted and sorry that I got heated over this stuff.

[loddie]

Earl,

Will you be posting your white paper on this thread or your website (or both)?

Thanks!

[gedlee]

Originally Posted by loddie

Earl,

Will you be posting your white paper on this thread or your website (or both)?

Thanks!

Both

[dantheman]

Any updates here?

Dan

[gedlee]

Originally Posted by dantheman

Any updates here?

Dan

Only this - I had it done or about 98% finished, then the program crashed and I lost a few hours of work so I am back to only about 90%. A few more days.

[dantheman]

Originally Posted by gedlee

Only this - I had it done or about 98% finished, then the program crashed and I lost a few hours of work so I am back to only about 90%. A few more days.

That stinks.

This might be of some interest to those who followed this thread and my other thread on driver break up. I replaced my cheapy eminence tweeter with the Selenium D220t. Here's the results:
on axis

11.25 off axis

22.5 off axis

33.75 off axis

45 off axis

The tweeter definitely has a wider dispersion in the upper octaves, but little less extension on the low end. I have a couple more questions:

1)The wider dispersion thing, does that mean the wavefront is more spherical at the mouth of the cd/throat of the horn?

2)When I actually mount the WG on a baffle will it get better low end extension?

Thanks again Gentlemen!

Dan