A Question About Time Alignment

You are correct, all frequencies being played travel at different speeds to your ears

BS

they travel at very different speed so the higher sounds need to be delayed and the lowest played first

BS

This is like high school science stuff.

If it it did work like you say, then the lightening bolt would a crack and woofer notes arriving later. But roll of thunder is more likely stuff we cannot see happening above the clouds.

Please don’t be rude and call science BS because you don’t believe in it. These are measurable results that I can produce which you can hear and isn’t BS in any way.  Your example with thunder and lightening is a great practical high school example. Thunder is caused by the lightening strike by expanding air around the bolt. Light travels at the speed of 186,291 miles per second and sound travels at 1,088 feet per second (depending on the air temp) so if you count the number of seconds from when you see the lightening bolt to the sound you hear and divide by 5 that is roughly how many miles the strike is from you. If there is no time between the strike and the sound find cover! Science my save your life in a thunderstorm and it can help reproduce the best recording reproduction you will ever hear. I learned a lot from this site and feel it is important to respect all views on the forum. If you have measurable scientific data that I’m full of BS I’d love to research it but I’m afraid the entire study of Physics and my ears disagree with you. 
 

Thanks,

Steve

@hifidream Steve, your post was great except for the velocity being a function of the frequency.

I can see how one might think that the velocity is a function of frquency as t links like this show v = freg * wavelength

let’s just round off the speed to 1 foot/millisecond.
And at a 1000 feet away the 1Hz takes a second to travel it.
what amount of time does 20Hz take to arrive?
And what amount of time does 20kHz take to arrive?

I have no doubt you MiniDSP sound good, and I suspect that the tweeter to woofer delays are on the order or inches or fractions of a millisecond.

if the speed was a function of frequency the the lightening crack would sound like a descending chirp from 20KHz down to 20Hz.
But it doesn’t, we see the lightening and we hear the crack a bit later. When it is so close that it is almost simultaneous our we also tend to crap our britches.

I tried to read every post here but too many have confused light waves with sound waves, light travels as a electromagnetic wave composed of photons, all electromagnetic waves travel at the same speed which is the speed of light.

Sound waves are a vibration, does not contain any photons, the vibration alternately compresses and decompresses the air particles next to it, creating a wave that is composed of compressions and refractions. Sound cannot therefore travel through space where there are no particles to create a sound wave.

Everything affects sound when it is in the air there is no free ride it is not a electromagnetic wave...

I copied and pasted the following for those of you in need of quick refresher:

You can calculate the wavelengths of audible sound in air. Audible sounds in air have frequencies that range from roughly 20 Hz to 20 kHz. Not surprisingly, the wavelengths of audible sounds also vary widely. Assuming a speed of sound of 340 m/s,

For 20 Hz sound in air: $\lambda =\frac{v}{f}=\frac{340m/s}{20Hz}=17m$

For 20 kHz sound in air: $\lambda =\frac{v}{f}=\frac{340m/s}{20,000Hz}=0.017m=1.7cm$

This calculation shows that wavelengths of sounds in air are distinctly human sized. The wavelengths range from roughly the diameter of a dime (for the highest frequencies) to roughly the length of a city bus (for the lowest frequencies). For comparison, the wavelengths of visible light are all far smaller than the thickness of a single human hair and have a very narrow range (from roughly 400 to 700 nm).