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redhawk
Posts: 3465
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How to disable onboard audio??

Mon Mar 24, 2014 10:32 pm

I would like to disable the analogue audio on the Pi and that includes the PWM engine.

I understand blacklisting the audio module should be possible but is it enough to prevent the PWM engine from starting up on boot??

What's the best procedure for this??

Richard S.

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ReBoot
Posts: 147
Joined: Mon Sep 17, 2012 2:23 pm
Location: Germany
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Re: How to disable onboard audio??

Tue Mar 25, 2014 4:14 pm

What exactly do you want to achieve? Disabling Audio isn't a Goal in itself, you follow a Goal and the way would be to disable Audio. What's the actual Goal?

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redhawk
Posts: 3465
Joined: Sun Mar 04, 2012 2:13 pm
Location: ::1

Re: How to disable onboard audio??

Tue Mar 25, 2014 4:45 pm

The onboard audio PWM is generating frequencies in the RF region it's also active at all times whether I like it or not.
I believe this maybe causing interference with one of my I2C radio modules but to find out for sure I need some way of turning it off.
This was possible with the old "click-pop" audio firmware but not anymore. :(

Edit: okay I've found a solution thanks to another post, you need to add the following line to the boot config.txt file force_pwm_open=0

Richard S.

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