diff --git a/README.md b/README.md
index 847987a..dcb2121 100644
--- a/README.md
+++ b/README.md
@@ -6,6 +6,16 @@
 ## Operating System
  [Raspberry PI OS](/marcio.fernandes/raspberrypi)
 
+## alsa plugin equalizer
+
+### Install
+    
+    sudo apt install -y libasound2-plugin-equal
+
+### Hot to use
+
+    alsamixer -D equal
+
 ## HiFiBerry Setup
 *[Information source](https://www.hifiberry.com/docs/software/configuring-linux-3-18-x/)*
   
@@ -19,7 +29,7 @@ Add this lines to /boot/config.txt
     dtoverlay=hifiberry-dacplus
 
 Copy/download file [etc/asound.conf](etc/asound.conf) to /etc/    
-  
+
 Reboot
 
 ## Bluealsa/bluealsa-aplay  
@@ -27,7 +37,8 @@ Reboot
 
 ### Install
 
-    sudo apt update && sudo apt install bluealsa -y
+    sudo apt install bluealsa -y
+    
 
 ### Start on boot