Thanks for this tutorial! Why not use the magnitude filter banks01 previously build in EQ vecav-MP? and adjust GD on this basis? It would be a better image of the major EQ effect on phase during FIR treatment, or i am wrong?
So sorry... vecav-MP? I'm not sure I understand what you're asking. If you are referring to adjusting group delay it needs to be done with a smooth response, and 1/6th smoothing is too coarse. I have a better way of doing this that I will share soon.
Hi David, you mention that there is another way to align group delay(GD). My L/R measurements from 20hz-400hz is totally non cohesive. It seems that the timing is totally off. I am using a pair of subs pairing with a pair of bookshelf. Would appreciate if you can do a detailed video on this. Cheers
I think what I was trying to say, if I understand your question correctly, is that you can go back in and refine the group delay by being meticulous in getting those left and right graphs to align as closely as possible. It's especially important to line them up below 150Hz, which is something I have come to realize through additional experimentation since making this video. There isn't another way to do it, but there is more tweaking you can do, definitely. I just didn't want to make the tutorial an hour long by making you watch all of that. It can get tedious. I'd love to do just that (make a dual sub video), but unfortunately I don't have two subs in a single system to test. I haven't done it myself yet. One of these days I will, but for now the tutorials can only get you started. Maybe you'll figure it out before I do!
Hi David, thanks for the reply. Your tutorials are extremely helpful. The dual sub phase alignment is a nightmare to deal with one of the sub having huge peaks & dips in the 40hz region.
Just a thought that I have observed after correction is that the corrected sound may sound ‘thinner’ and seems to lost some of the ‘grunt’. The more precise and thinner sounding sound may be good for certain genre like vocals or perhaps electronic music. At the same time it may also sound weird on Rock and Metal. My guess is that a lot of sound pressure is being removed in the 200-800 hz region, especially for my case, the pair of speakers is only 5cm off the wall which exacerbated the problem.
Just speculating here, but there is a need to increase the volume level of the output (amplifier) to compensate for the loss of level introduced by the filter. I assume you've turned the level up to where it should be; to where it's optimal. If you are listening at lower levels, there is going to some perceived loss of "grunt" as you say. There needs to be a level-matched output in order to make comparative conclusions. It could also be that you just aren't used to the sound of a neutral response, which definitely can be weird at first. Unfortunately I can't hear your room, but my advice is to just make sure you've done everything right, turn up the volume, then live with the filter for a while. If it is doing its job correctly, the moment you turn the filter off you'll be thinking to yourself just how bad the system sounds without it. Something else you can try is just a simple frequency response filter that only acts as an inverter EQ. Try that and see what it gives you. I just put up a new video explaining how to do it.
Loved all the parts and the idea. BUT READ CAREFULLY. You NEED a top end 2013 Haswell Laptop CPU or Top end Haswell Desktop CPU or ABOVE to complete all the steps. This piece of shit of software that i love so much called REW isn't Optimized to work with lower CPUs than the Top End Haswell. I did all the steps till REW crashed on my face. I obviously DID ALL AGAIN BECAUSE Im just a perfectionist like you that does not give up. returning to the first 14 measurements and again crashed in the lasts steps on my face this not greatly Optimized Software. SO. You Need at LEAST a Top end 4th Gen Intel or equivalent AMD cpu. You have been Warned.
Thanks for this tutorial! Why not use the magnitude filter banks01 previously build in EQ vecav-MP? and adjust GD on this basis? It would be a better image of the major EQ effect on phase during FIR treatment, or i am wrong?
So sorry... vecav-MP? I'm not sure I understand what you're asking. If you are referring to adjusting group delay it needs to be done with a smooth response, and 1/6th smoothing is too coarse. I have a better way of doing this that I will share soon.
Hi David, you mention that there is another way to align group delay(GD). My L/R measurements from 20hz-400hz is totally non cohesive. It seems that the timing is totally off. I am using a pair of subs pairing with a pair of bookshelf. Would appreciate if you can do a detailed video on this. Cheers
I think what I was trying to say, if I understand your question correctly, is that you can go back in and refine the group delay by being meticulous in getting those left and right graphs to align as closely as possible. It's especially important to line them up below 150Hz, which is something I have come to realize through additional experimentation since making this video. There isn't another way to do it, but there is more tweaking you can do, definitely. I just didn't want to make the tutorial an hour long by making you watch all of that. It can get tedious.
I'd love to do just that (make a dual sub video), but unfortunately I don't have two subs in a single system to test. I haven't done it myself yet. One of these days I will, but for now the tutorials can only get you started. Maybe you'll figure it out before I do!
Hi David, thanks for the reply. Your tutorials are extremely helpful. The dual sub phase alignment is a nightmare to deal with one of the sub having huge peaks & dips in the 40hz region.
Just a thought that I have observed after correction is that the corrected sound may sound ‘thinner’ and seems to lost some of the ‘grunt’. The more precise and thinner sounding sound may be good for certain genre like vocals or perhaps electronic music. At the same time it may also sound weird on Rock and Metal. My guess is that a lot of sound pressure is being removed in the 200-800 hz region, especially for my case, the pair of speakers is only 5cm off the wall which exacerbated the problem.
Just speculating here, but there is a need to increase the volume level of the output (amplifier) to compensate for the loss of level introduced by the filter. I assume you've turned the level up to where it should be; to where it's optimal. If you are listening at lower levels, there is going to some perceived loss of "grunt" as you say. There needs to be a level-matched output in order to make comparative conclusions. It could also be that you just aren't used to the sound of a neutral response, which definitely can be weird at first. Unfortunately I can't hear your room, but my advice is to just make sure you've done everything right, turn up the volume, then live with the filter for a while. If it is doing its job correctly, the moment you turn the filter off you'll be thinking to yourself just how bad the system sounds without it.
Something else you can try is just a simple frequency response filter that only acts as an inverter EQ. Try that and see what it gives you. I just put up a new video explaining how to do it.
How did you hide the waterfall plot graph in the EQ section?
Un Equalizzatore free che carica il risultato? Per poterlo usare il Cubase?
Loved all the parts and the idea. BUT READ CAREFULLY. You NEED a top end 2013 Haswell Laptop CPU or Top end Haswell Desktop CPU or ABOVE to complete all the steps. This piece of shit of software that i love so much called REW isn't Optimized to work with lower CPUs than the Top End Haswell. I did all the steps till REW crashed on my face. I obviously DID ALL AGAIN BECAUSE Im just a perfectionist like you that does not give up. returning to the first 14 measurements and again crashed in the lasts steps on my face this not greatly Optimized Software. SO. You Need at LEAST a Top end 4th Gen Intel or equivalent AMD cpu. You have been Warned.