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Compensating physical limitations to create a neutral sounds profile is useful regardless of the size of the speaker. I have a custom-made subwoofer that can h

by Aeolos 3y ago

Compensating physical limitations to create a neutral sounds profile is useful regardless of the size of the speaker. I have a custom-made subwoofer that can hit 12Hz (measured), and creating a DSP profile to compensate for my room + speaker acoustics has significantly improved the listening experience.[1][2] [1] https://www.hifiberry.com/shop/boards/beocreate-4-channel-amplifier/ https://www.hifiberry.com/shop/boards/beocreate-4-channel-am... [2] https://github.com/hifiberry/hifiberry-dsp/blob/master/doc/rew-basics.md https://github.com/hifiberry/hifiberry-dsp/blob/master/doc/r...

globular-toast 3y ago
Is this more than just EQ? I think AVRs do some latency compensation too, although that's probably only a problem in multi-channel set ups.
- Aeolos 3y ago
  It's primarily EQ calibrated via a frequency sweep of the room + speaker acoustics. The hifiberry DSP does primarily three things: - equalization for speaker + room acoustics - customizable crossover frequency for speakers (in my case a 2.1 setup) - loudness equalization across speakers There may be a latency compensation module, but that's not something I needed in my case. None of this is rocket science, but audio does sound significantly better after compensation. Specifically, my living room geometry was causing standing waves in the ~200 Hz range, making the low-end sound unpleasantly boomy. The calibrated compensation pretty much eliminated this, without needing to invest in physical sound traps and the like. This is a fun little project for really not much money. I recommend it to everyone who likes tinkering, all you need is a <$100 measurement mic, REW, and a tiny bit of patience.
  - globular-toast 3y ago
    If your standing waves mean you only need to attenuate frequencies with EQ then you're very lucky! A standing wave means there will be some parts of the room that are too loud (antinodes) and some that are too quiet (nodes). Bass traps are to eliminate standing waves such that you won't have this variance around the room. The bigger problem is when your sitting position is in a node meaning you will completely lose a bass frequency. You can't EQ that back. EQing out bass if you sit in an antinode is definitely better than nothing, though.

by Aeolos 3y ago

globular-toast 3y ago

Is this more than just EQ? I think AVRs do some latency compensation too, although that's probably only a problem in multi-channel set ups.

Aeolos 3y ago
It's primarily EQ calibrated via a frequency sweep of the room + speaker acoustics. The hifiberry DSP does primarily three things: - equalization for speaker + room acoustics - customizable crossover frequency for speakers (in my case a 2.1 setup) - loudness equalization across speakers There may be a latency compensation module, but that's not something I needed in my case. None of this is rocket science, but audio does sound significantly better after compensation. Specifically, my living room geometry was causing standing waves in the ~200 Hz range, making the low-end sound unpleasantly boomy. The calibrated compensation pretty much eliminated this, without needing to invest in physical sound traps and the like. This is a fun little project for really not much money. I recommend it to everyone who likes tinkering, all you need is a <$100 measurement mic, REW, and a tiny bit of patience.
- globular-toast 3y ago
  If your standing waves mean you only need to attenuate frequencies with EQ then you're very lucky! A standing wave means there will be some parts of the room that are too loud (antinodes) and some that are too quiet (nodes). Bass traps are to eliminate standing waves such that you won't have this variance around the room. The bigger problem is when your sitting position is in a node meaning you will completely lose a bass frequency. You can't EQ that back. EQing out bass if you sit in an antinode is definitely better than nothing, though.