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+# Raspberry Pi configuration
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+
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+This documentation deals with the special configuration needed for get kalliope working on a RPi.
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+
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+## Packages
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+
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+On a Raspberry Pi, pulseaudio is not installed by default
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+```
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+sudo apt-get install pulseaudio pulseaudio-utils
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+```
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+
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+Start the pulseaudio server
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+```
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+pulseaudio -D
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+```
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+
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+## Microphone configuration
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+
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+Get your output card
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+```
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+aplay -l
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+```
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+
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+Output example with a USB headset connected
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+```
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+**** List of PLAYBACK Hardware Devices ****
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+card 0: ALSA [bcm2835 ALSA], device 0: bcm2835 ALSA [bcm2835 ALSA]
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+ Subdevices: 7/8
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+ Subdevice #0: subdevice #0
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+ Subdevice #1: subdevice #1
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+ Subdevice #2: subdevice #2
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+ Subdevice #3: subdevice #3
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+ Subdevice #4: subdevice #4
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+ Subdevice #5: subdevice #5
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+ Subdevice #6: subdevice #6
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+ Subdevice #7: subdevice #7
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+card 0: ALSA [bcm2835 ALSA], device 1: bcm2835 ALSA [bcm2835 IEC958/HDMI]
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+ Subdevices: 1/1
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+ Subdevice #0: subdevice #0
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+card 1: Headset [Logitech USB Headset], device 0: USB Audio [USB Audio]
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+ Subdevices: 0/1
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+ Subdevice #0: subdevice #0
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+```
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+
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+Here, we can see that we have
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+- the analog audio (where the jack is connected) on the card 0 and device 1
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+- usb audio on card 1 and device 1
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+
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+
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+Get your input (microphone card)
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+```
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+arecord -l
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+```
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+
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+Output example with a USB headset connected
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+```
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+**** List of CAPTURE Hardware Devices ****
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+card 1: Headset [Logitech USB Headset], device 0: USB Audio [USB Audio]
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+ Subdevices: 0/1
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+ Subdevice #0: subdevice #0
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+```
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+
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+Here we can see that we have one peripheral on card 1 and device 0
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+
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+Now, we create a configuration file that will do apply the following configuration:
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+- output audio (what Kalliope say) on the analog audio (via speakers connected to the jack)
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+- input audio (what we say to Kalliope) on the USB microphone
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+
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+Create a file in `/home/pi/.asoundrc` with the content bellow
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+```
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+pcm.!default {
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+ type asym
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+ playback.pcm {
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+ type plug
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+ slave.pcm "hw:1,0"
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+ }
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+ capture.pcm {
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+ type plug
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+ slave.pcm "hw:1,0"
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+ }
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+}
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+```
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+
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+Where `playback.pcm` is the output audio and the `capture.pcm` is the input audio.
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+
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+Restart alsa to apply changes
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+```
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+sudo /etc/init.d/alsa-utils restart
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+```
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+
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+Do not forget to test recording your voice:
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+
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+Capture audio from your microphone
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+```
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+rec test.wav
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+```
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+
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+Then play the recorded audio file
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+```
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+mplayer test.wav
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+```
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+
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+
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+## HDMI / Analog audio
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+
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+By default the audio stream will get out by HDMI if something is plugged to this port.
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+Check the [official documentation](https://www.raspberrypi.org/documentation/configuration/audio-config.md) to switch from HDMI to analog.
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+
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+```
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+sudo raspi-config
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+```
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