I have Raspbian installed on my Rasperry Pi. I have a Delock USB Audio Card and setted it up, works good. My speaker set has a quite strong bass, so I need an equalizer.

There is an alsa plugin which gives me an equalizer, but it doesn't change the usb card sound. If I set the equalizer output as first output, I can't hear anything. I also tried "pulseaudio", but I don't get ho to set it up.

I'm not very familiar with such programs and quite new to Linux. I used this tutorial to set up the usb audio card: http://computers.tutsplus.com/articles/using-a-usb-audio-device-with-a-raspberry-pi--mac-55876

Can someone help me to install an equalizer?

edit: At first I installed the alsa equal plugin. I added the asound.conf file:

ctl.equal {
type equal;
controls "/home/pi/.alsaequal.bin"

pcm.plugequal {
type equal;
slave.pcm "plughw:1,0";
controls "/home/pi/.alsaequal.bin"

pcm.equal {
type plug;
slave.pcm plugequal;

When I type ´alsamixer -D equal´ an equalizer shows up, but changing the values has no effects. I tried to change the line

pcm.equal {


pcm.!default {

and rebooted, but then I couldn't hear anything. That's where I am right now.

  • 1
    Explain which part of the instructions you don't understand, then we can help you over that hump. – X Tian Jun 23 '15 at 20:32
  • @XTian I edited my question – wernersbacher Jun 23 '15 at 21:18

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