Print Page - A20 SOM record from Line In

Title: A20 SOM record from Line In
Post by: anthonym on December 18, 2014, 02:55:20 PM

Hi All,

I am trying to get audio recording working via the line in connections on the A20 SOM (GPIO1) but unfortunately no luck so far.

Everything works fine if I use the MIC input on the Evaluation board but I cannot get anything from the Line In connections.

I have noticed that if I enable Left Cap and Right Cap in alsamixer as soon as try to arecord they are set back to off.

Anyone got any ideas?

Title: Re: A20 SOM record from Line In
Post by: Gerrit on December 18, 2014, 03:48:10 PM

To select the input port you have to set the mixer control called ADC Input Mux

You can adjust it with alsamixer or amixer

http://linux-sunxi.org/Audio_Codec

Title: Re: A20 SOM record from Line In
Post by: anthonym on December 18, 2014, 04:43:15 PM

Thanks for the reply, tried input 0-7 still no luck

Title: Re: A20 SOM record from Line In
Post by: anthonym on December 18, 2014, 06:14:53 PM

Hi,

Check that, working fine, think I had the pre-amp set too high and it was overloaded (i.e. no input).

Thanks for your help.

Olimex Support Forum

OLinuXino Android / Linux boards and System On Modules => A20 => Topic started by: anthonym on December 18, 2014, 02:55:20 PM