Show HN: HiFiScan, a Python app to optimize your loudspeakers

Post by patrakov » Sun, Sep 11, 2022, 5:48 PM UTC

erdewit wrote: post #40

patrakov wrote: post #24

There is an older project with better math inside: http://drc-fir.sourceforge.net/ For starters, it doesn't try to achieve a phase-neutral response, because a phase-neutral response created in a room is only valid in one point of the room, and creates pre-echo artifacts elsewhere. In fact, it tries to separate the response of the speaker itself from the response of the room, by setting a threshold in the time domain,…

> because a phase-neutral response created in a room is only valid in one point of the room Author here. The term "phase-neutral" simply means here that the impulse response is symmetrical and doesn't add a phase shift. It doesn't even try to neutralize the phase characteristics of the room, which is what you may be thinking. In fact the phase information from the measurement is completely discarded. Furthermore, the…

Post by [deleted] » Sun, Sep 11, 2022, 6:17 PM UTC

patrakov wrote: post #24

There is an older project with better math inside: http://drc-fir.sourceforge.net/ For starters, it doesn't try to achieve a phase-neutral response, because a phase-neutral response created in a room is only valid in one point of the room, and creates pre-echo artifacts elsewhere. In fact, it tries to separate the response of the speaker itself from the response of the room, by setting a threshold in the time domain,…

Post by willis936 » Sun, Sep 11, 2022, 7:03 PM UTC

aeturnum wrote: post #35

ttpphd wrote: post #28

I'm a psychoacoustician and this is not the way, very sorry to report. Others have touched on the acoustic issues already, so let me touch on the psychological ones: your perception of sound from loudspeakers doesn't just depend on the acoustic waves hitting your ears. It also depends on your personality and expectations. If you genuinely believe that doing a seance to drive out the poltergeist from your speaker set…

A friend loaned me a fancy usb DAC a while back and I used it to listen to music while I worked. After about a day or so I asked her if it was my imagination or if the audio really did sound better. Her answer was that there's no difference between those situations: if I imagine it sounds better, it does sound better.

Post by newaccount74 » Sun, Sep 11, 2022, 7:10 PM UTC

solardev wrote: post #48

zihotki wrote: post #47

Earlier quoted context omitted.

That one is an automatic room equalization, it's different from speaker equalization and it probably should be done after speaker equalization. But it's more useful for the end user.

Sorry, I might've linked the wrong patent then. (I meant to, but failed to, find the one that handles speaker equalization for a single speaker). By room equalization, do you mean normalizing volumes between different rooms, or...?

Post by its_bbq » Sun, Sep 11, 2022, 7:24 PM UTC

vladvasiliu wrote: post #46

IAmGraydon wrote: post #21

I'm not an audiophile in the obsessive-compulsive sense, but I've been recording music in my home studio for 20 years and I know my way around it. This sort of calibration is not ideal. Not only are you measuring with a device that has an imperfect response curve, but you are also measuring the room at a single monophonic point in space. The way that sound interacts with the room and your ears is far more complex tha…

> you're far better off learning how to treat the room properly Would you have some pointers on this? I've been looking into this and while I've found pointers on "what to do", what's missing is where to actually find the necessary panels and how to figure if they're actually worth anything.