Equalization

[Macdelf]

I don’t know if anyone else is trying to get camilla to wok, but I have hit a snag. After replacing the device alsaequal with camilladsp I get “device not found”. Any advice is welcome.

The alsa_cdsp module is in the wrong location (my bad), you can correct it by running the following command:

Code:

sudo install -m 644 `pkg-config --variable=libdir alsa`/libasound_module_pcm_cdsp.so `pkg-config --variable=libdir alsa`/alsa-lib/

That got it to work. Thank You. One question I am using a Biquad High pass filter with a Q of 2. Camilla outputs coefficients (printed when run from ssh) that look like a Q of 0.5 instead. It is easier to ask than to try to measure it. I want the 6 dB peak in the frequency response. The speakers were designed to have it.


devices:
  samplerate: 44100
  chunksize: 1024
  queuelimit: 1
  capture:
    type: File
    channels: 2
    filename: "/dev/stdin"
    format: S16LE
    extra_samples: 8192
  playback:
    type: Alsa
    channels: 2
    device: "hw:0,0"
    format: S32LE

filters:
  hp_802:
    type: Biquad
    parameters:
      type: Highpass
      freq: 26
      q: 2.0

pipeline:
  - type: Filter
    channel: 0
    names:
      - hp_802
  - type: Filter
    channel: 1
    names:
      - hp_802