Daltong
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- Joined
- Mar 9, 2022
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So basically I have AeonRT and Qudelix (both reviewed by Amir and so far very okay experience)
For some reason I decided to check if reducing signal below 20hz (which shouldn't be audible or particularly relevant to headphones experience due to limited excursion magnitude, "bone bass" is not what headphones are reasonably expected to do... I mean Amir doesn't even measure that low haha ) would change anything about the experience.
So I've used Amir's EQ recipe and just added a couple of filters to cause a large signal drop below 20 Hz (Qudelix's EQ goes as low as 10 Hz), tweaked it so that the decrease would start at 18 Hz and not affect the shape of bass bump much (as per Qudelix's own curve visualization)
So I expected there to be no effect / subtle placeboish stuff. Like changing between two good cables stuff.
The change felt distinct, substantial.
So I thought that's weird.
So I took 20 Hz sine wave tests (one flac file and also online sine tone generator as additional reference) and listened to them at "detectable but not uncomfortable" loudness using Amir EQ as "baseline".
The tests sound differently based on whether the "below 20 Hz cut" is in or not.
This is true both for Syznalski's online tone generator and high quality 20 Hz flac file so it is unlikely to be an issue with the sine signal being somehow wrong.
What's going on and why is it going on ?
P.S.: I am so mystified I might get myself a semi-decent headphones recording mic just to take a look at what exactly is being played back with and without the "cut below 20" tweak
For some reason I decided to check if reducing signal below 20hz (which shouldn't be audible or particularly relevant to headphones experience due to limited excursion magnitude, "bone bass" is not what headphones are reasonably expected to do... I mean Amir doesn't even measure that low haha ) would change anything about the experience.
So I've used Amir's EQ recipe and just added a couple of filters to cause a large signal drop below 20 Hz (Qudelix's EQ goes as low as 10 Hz), tweaked it so that the decrease would start at 18 Hz and not affect the shape of bass bump much (as per Qudelix's own curve visualization)
So I expected there to be no effect / subtle placeboish stuff. Like changing between two good cables stuff.
The change felt distinct, substantial.
So I thought that's weird.
So I took 20 Hz sine wave tests (one flac file and also online sine tone generator as additional reference) and listened to them at "detectable but not uncomfortable" loudness using Amir EQ as "baseline".
The tests sound differently based on whether the "below 20 Hz cut" is in or not.
This is true both for Syznalski's online tone generator and high quality 20 Hz flac file so it is unlikely to be an issue with the sine signal being somehow wrong.
What's going on and why is it going on ?
P.S.: I am so mystified I might get myself a semi-decent headphones recording mic just to take a look at what exactly is being played back with and without the "cut below 20" tweak