linuxonly
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Thread Starter
- Joined
- Jul 27, 2024
- Posts
- 108
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- Preamp, Processor or Receiver
- Logitech Z906
- DAC
- AMD FCH Azalia
- Computer Audio
- SPDIF output with alsa, pipewire, wireplumber on Fedora 40
- Streaming Equipment
- Kodi
- Front Height Speakers
- 33 in
- Middle Height Speakers
- 30 in
- Rear Height Speakers
- 57 in
- Video Display Device
- X11/VGA + X11/DVI
I asked myself what this phenomenon was. After correcting the frequency response of my speakers with an inverse filter, I performed a slow sweep from 20 Hz to 20 kHz using a DSP with these filters on each speaker. The speakers are in good condition and identical. Only their positioning in the room varies. They are fixed to the wall with a mount and about 12 cm away from the wall. There is no interference with the subwoofer due to filters to eliminate crosstalk. The phenomenon in question emphasizes certain frequencies between 100 and 2000 Hz, different for each speaker, for example 105, 250, 400, 500, 700 Hz, up to 2, 3 or even 4 times normal intensity. The source seems to come from the speaker itself. At normal audio material listening, it bothers not really but I assume that if this phenomenon were corrected, the listening experience would improve. What exactly is going on here?