Disable analog input due buffer issues. #1 #6

config/sample-docker.engine-core.ini

@@ -41,7 +41,7 @@ soundsystem="alsa"
 # With 'alsa' you have to write the devicenames like 'default' to use the system default or 'hw:0' to use the 1st audio device directly.
 # With Pulse Audio and Jack => an non empty value means it is used
 # Devices with empty string are ignored and not used
-input_device_0="default"
+input_device_0=""
 input_device_1=""
 input_device_2=""
 input_device_3=""