![]() That issue is now fixed in the Pi firmware. For example: amixer cset numid=1 50% sets the headphone jack volume output to fifty percent.įor more information on audio out commands, I found the following web site useful: įor what it's worth, I was also experiencing a popping sound caused by a voltage jump when the audio starts and stops. Use amixer to control the volume output.For example: use omxplayer /usr/share/scratch/Media/Sounds/Effects/WaterDrop.mp3 or alternatively mpg123 /usr/share/scratch/Media/Sounds/Effects/WaterDrop.mp3 (If you don't already have mpg123, you should be able to install it with the command sudo apt-get install mpg123). For example: aplay /usr/share/scratch/Media/Sounds/Vocals/Singer2.wav (there are lots of sample audio files in /usr/share/scratch/Media/Sounds). Added a Sound copy constructor from another Sound object, making sure samplingfrequency also gets copied. Also ensure that you use a player appropriate for the audio format. Changed default value of the veryaccurate parameter of Sound.topitchac and Sound.topitchcc to False, matching Praats default. ![]() To test the sound output on your Pi, I found it best to the sample audio files that come with the Raspbian OS. Also, some of the MP3 files I used may not have been created with a compatible codec. ![]() Primarily, I tried to play an MP3 file with aplay, which only seems to support WAVs. I'm using Raspbian 3.6.11 (-wheezy-raspbian). But it was a problem with my approach, not the Pi itself. I ran into a problem where sound did not work or static played instead of my recording. To ensure the module is initialised on boot, add snd_bcm2835 to /etc/modules ( source). Sudo apt-get install alsa-utils is permanent, but sudo modprobe snd_bcm2835 only initialises the driver for the current session. And to test HDMI./hello_audio.bin 1Īlso note that you may have to add your user to the audio group to get permission to access the sound card. If you are running Debian, try cd /opt/vc/src/hello_pi Where n is one of: 0 = auto, 1 = headphones, 2 = hdmi. Assuming that by 'all possible data about audio' you only mean fundamental frequency, formant structure and intensity contour (and not, say, spectra, pulses, etc), the easiest way to do this is to generate respectively a Pitch, Formant, and Intensity objects. You can force it with: sudo amixer -c 0 cset numid=3 Sudo aplay /usr/share/sounds/alsa/Front_Center.wavīy default output will be automatic ( hdmi if hdmi supports audio, otherwise analogue). To try out sound, from the command prompt before "startx", type sudo apt-get install alsa-utils Sound is disabled by default because the ALSA sound driver is still "alpha" (not fully tested) on the R-Pi. Sound does not work at all, or in some applications This fix may be necessary even if other HDMI devices work perfectly on the same monitor (or TV)!Įdit the /boot/config.txt file ( see Raspberry-Pi Configuration File) and add the following line to the configuration file: hdmi_drive=2 This is caused by some computer monitors which select DVI mode even if an HDMI cable is connected.
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