Show pageOld revisionsBacklinksBack to top This page is read only. You can view the source, but not change it. Ask your administrator if you think this is wrong. ======Installation of an Equalizer====== Install **Alsaequal** with the following command: <code bash> sudo apt-get install libasound2-plugin-equal </code> Answer **yes** to all the questions List the cards available in the system by typing: <code bash> aplay -l </code> <code bash> **** List of Peripherals Devices PLAYBACK **** carte 0: Device [USB PnP Sound Device], périphérique 0: USB Audio [USB Audio] Sous-périphériques: 1/1 Sous-périphérique #0: subdevice #0 carte 1: ALSA [bcm2835 ALSA], périphérique 0: bcm2835 ALSA [bcm2835 ALSA] Sous-périphériques: 8/8 Sous-périphérique #0: subdevice #0 Sous-périphérique #1: subdevice #1 Sous-périphérique #2: subdevice #2 Sous-périphérique #3: subdevice #3 Sous-périphérique #4: subdevice #4 Sous-périphérique #5: subdevice #5 Sous-périphérique #6: subdevice #6 Sous-périphérique #7: subdevice #7 carte 1: ALSA [bcm2835 ALSA], périphérique 1: bcm2835 ALSA [bcm2835 IEC958/HDMI] Sous-périphériques: 1/1 Sous-périphérique #0: subdevice #0 </code> I want to use the USB sound card "C-Media USB Headphone Set". This is the "Card 0". The card number (0 in our case) will be used in the next step configuration. Create a config file asound.conf We need to connect Alsa and the plugin **Alsaequal**, so that the settings be applied to this plugin. This is done in the file asound.conf. You can create it with this command: <code bash> sudo nano -c /etc/asound.conf </code> Copy the following content: <code python | asound.conf> ctl.equal { type equal; controls "/home/pi/.alsaequal.bin" } pcm.plugequal { type equal; slave.pcm "plughw:0,0"; controls "/home/pi/.alsaequal.bin" } pcm.equal { type plug; slave.pcm plugequal; } </code> Change the first "0" with your sound card number [plughw:''0'',0]. Save and quit We must now configure SvxLink so that it uses equalizer: Edit **svxlink.conf** In the part Tx1 remplace the line //AUDIO_DEV=alsa:plughw:0// with **AUDIO_DEV=alsa:plug:plugequal** <code bash> [Tx1] TYPE=Local #AUDIO_DEV=alsa:plughw:0 AUDIO_DEV=alsa:plug:plugequal AUDIO_CHANNEL=0 </code> Reboot <code bash> sudo reboot </code> To access the equalizer settings, type the following command: <code bash> sudo alsamixer -D equal </code> {{ :fr:documents:alsamixer_d_equal.jpg?nolink&800 |}} Use the arrow keys on the keyboard, right and left to move up and down to adjust the levels. en/equalizer.txt Last modified: 2020/07/05 17:13(external edit)