Why Linear Phase Filters are Used 

This video is an eye opener! I especially liked the part when you explained why linear phase shift preserved the shape of the waveform. Not a lot of lectures/books/tutorials explain that like you did intuitively. So ironically the part where you said it was the least important is what I thought was the most important for me...

Essentially the FIR filter introduces a delay that's constant across all frequencies. Good video!

Omg there is no lecturer in my whole university that during lessons explained why GLP, not how(with all thoose fancy equations). I hope you became a big man in DSP world, cuz you are the guy with ANSWERS.

Best explanation of linear phase. thank you so much!

Amazing tutorial. Covered all the important points. Thank you!

Thanks for the wonderful explanation. This has helped me understand many concepts including causality.

Excellent explanation. Very helpful. Thank you!

Excellent explanation and visualization

Awesome video . Thank You Sir

Very useful and great amount of information. Thanks

Excellent video!

Thank you so much, it is very useful!

Perfect^10000000... Real eye opener video

thank you so much

very unbelievable fantastic tutorial ....damn, you are a genius teacher sir....lol.

this was great! thank you. so basically a linear phase filter provides a certain phase shift at a certain frequency, and for example twice that phase shift at twice the frequency? (in your case 5/3 the shift because the frequency was multiplied by 5/3 when going from 3 to 5)

thank you

this is G"DAMMED BEAUTIFUL!!!!

Amazing Video. thanks for that. But regarding "Audio applications do not require linear phase filters because the human ear cannot detect phase change" - as this is a correct statements, but while audio processing does not stop at the non-liner phase filter, some further processes may be applied after the filer, such as a compressor/limiter, or a distortion (non-linear process) , which then the wave shape difference may cause the non-linear system to behave differently and produce different harmonic distortions or such... thanks.

Awesome

thanks bro!

I'm not quite sure about that but shouldn't you include the group delay in the filtered data? Linear phase = const. group delay, so the time signal must be shifted by the group delay to be exactely aligned with unfiltered signal

Sorry why do you use FIR as linear filter and IIR as non linear filter?

Heighth?

very cool, linear phase preserves the phase of the signal but why dont you use a sound to show this. I mean music, it will be more convincing...because the magnitude used here are not equal it might be bcos of this, I actually understand the whole concept and phenomenon, but I have never seen any one using music to illustrate this concept, of linear phase and non linear phase.