On 5/20/14, 3:40 AM, "Raphael Philipe" <[email protected]> wrote:
>It seems that I messed with the amixer parameters. Now I can not even >hear from the speaker test. Is there a way of reseting alsa >parameters, not only the general audio volume? > >I saw something like >alsactl restore -P >and removing '/var/lib/alsa/asound.state To restart alsa-utils, do the following: invoke-rc.d alsa-utils restart Regards, John >but it didn't work for parameters specifically to the DA830 EVM. > >Why the audio cape is recognized as a DA830 EVM? > >I suspect that the audio input is not working due to one of that >parameters. > >Regards, Raphael. > >On Sun, May 18, 2014 at 8:22 PM, John Syn <[email protected]> wrote: >> >> From: Raphael Philipe <[email protected]> >> Reply-To: <[email protected]> >> Date: Sunday, May 18, 2014 at 3:30 PM >> To: <[email protected]> >> Subject: [beagleboard] Beaglebone Audio Cape Rev B audio Input >> >> >> Hi >> >> I've acquired an Audio Cape Rev B >> http://elinux.org/CircuitCo:Audio_Cape_RevB for my Beaglebone Black. >> >> Following the instructions I was able to make it work. The audio >>playback is >> working pretty well. However, I cannot test the audio input. I saw that >>it >> is a line level input (line in), so it cannot be connected to a regular >> microphone. >> >> I want to test it through an echo scheme. I will produce some sound >>through >> q source (connected to the line in input of the cape) and check the >>response >> in the audio output, through an earphone. >> >> I tried to connect the cape line in to the earphone output of an old >> cellphone through a male male jack cable (I saw in some forums that the >>line >> level is similar to the earphone output of some appliances, apart from >>the >> impedance difference.). Unfortunately, it didn't work. >> >> The interesting thing is that when the cable is connected to the cape >>audio >> input and the other connector is unplluged, I can hear the noise from >> static, similar to an unplugged to the amplifier electric guitar . >> >> Can someone suggest me a simple form to test the audio input? >> >> I don¹t have the Audio Cape, but I do have a TLV320AIC3106EVM connected >>to >> my BBB and it works fine. You may want to try the following command: >> >> arecord -r 44100 -c 1 -f S16_LE -t wav -vv -d 25 example.wav >> >> This will show you a bar graph in the terminal so you can see the input >> levels. I would just connect the output from you phone to the line >>input of >> your audio cape. In another terminal, run amixer to adjust the input >>levels. >> >> Regards, >> John >> >> >> Regards. >> >> -- >> 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. > >-- >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.
