From: Charles Kerr <[email protected]>
Reply-To: "[email protected]" <[email protected]>
Date: Friday, June 20, 2014 at 6:36 PM
To: "[email protected]" <[email protected]>
Subject: [beagleboard] Setting volume from C++ on the audio cape (Rev B1)
> I have the following code which I think should set the volume on the audio
> cape to 100%
Use alsamixer to experiment with the various settings. After that, it will
be easier to work out how to do this programatically.
Regards,
John
>
> int32_t mixer_fd=0;
>
>
> mixer_fd=open("/dev/mixer", O_WRONLY);
>
> if (mixer_fd>0)
>
>
> {
>
>
> int vol=0x6464;
>
>
> if
> (ioctl(mixer_fd, SOUND_MIXER_WRITE_VOLUME, &vol)==-1)
>
>
> {
>
>
> std::cout <<"Error setting volume"<<std::endl;
>
> }
>
> close(mixer_fd);
>
>
> }
>
>
>
> However, the volume is still barely audible. Is there something else that
> needs to be done?
> --
> For more options, visit http://beagleboard.org/discuss
> ---
> You received this message because you are subscribed to the Google Groups
> "BeagleBoard" group.
> To unsubscribe from this group and stop receiving emails from it, send an
> email to [email protected].
> For more options, visit https://groups.google.com/d/optout.
--
For more options, visit http://beagleboard.org/discuss
---
You received this message because you are subscribed to the Google Groups
"BeagleBoard" group.
To unsubscribe from this group and stop receiving emails from it, send an email
to [email protected].
For more options, visit https://groups.google.com/d/optout.
