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raspberry:audio_injector [2020/02/06 20:13]
admin [I2S Pins] 		raspberry:audio_injector [2020/03/05 23:38]
admin [Alsa Mixer Settings]
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 ===== Audio Injector Installation ===== ===== Audio Injector Installation =====
  
-[[http://www.audioinjector.net/rpi-hat|Audio Injector]] is a audio hat for the [[https://www.raspberrypi.org/|Raspberry Pi]]. This sound card comes with two inputs and two outputs, plus a build in microphone.\\+[[http://www.audioinjector.net/rpi-hat|Audio Injector Stereo Soundcard]] and the [[http://www.audioinjector.net/rpi-zero|Raspberry Zero Soundcard]] by [[http://www.audioinjector.net/|Audio Injector]] are audio hats for the [[https://www.raspberrypi.org/|Raspberry Pi]]. These sound cards comes with two inputs and two outputs, plus a build in microphone.\\
  
-==== Installation === +---- 
-This manual is made for an Raspberry Pi 4 running [[https://www.raspberrypi.org/downloads/raspbian/|Raspian Buster]] on it.\\ +==== Installation ==== 
-After connecting the Audio Injector to the Raspberry Pi change some configurations, in:+ 
 +This manual is made for an Raspberry Pi 4 running [[https://www.raspberrypi.org/downloads/raspbian/|Raspian Buster]] on it. It's also tested with a Raspberry Pi Zero running Raspian Buster.\\ 
 + 
 +After connecting the Audio Injector to the Raspberry Pi some software should be installed.\\ 
 +First you have to download the deb package from [[http://forum.audioinjector.net/viewtopic.php?f=5&t=3]]. Unpack it: 
 +   $ tar -xf audio.injector.scripts_0.1-1_all.deb.tar.gz 
 +And install it: 
 +   $ sudo apt install ./audio.injector.scripts_0.1-1_all.deb 
 +Change some configurations, in:
    $ sudo nano /boot/config.txt    $ sudo nano /boot/config.txt
 Comment out: Comment out:
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 Reboot your Raspberry Pi: Reboot your Raspberry Pi:
    $ sudo reboot    $ sudo reboot
-\\ + 
-After the reboot download:+---- 
 +---- 
 +==== Alsa Mixer Settings ==== 
 + 
 +[[https://github.com/Audio-Injector/stereo-and-zero]]\\ 
 +There are two reference alsa mixer files which will allow you to setup default output with either line input or microphone input : 
 +Download:
    $ wget https://github.com/Audio-Injector/stereo-and-zero/archive/master.zip    $ wget https://github.com/Audio-Injector/stereo-and-zero/archive/master.zip
 Unpack it: Unpack it:
    $ unzip master.zip    $ unzip master.zip
 go into the folder: go into the folder:
-   $ cd stereo-and-zero-master/+   $ cd stereo-and-zero-master/audio.injector.scripts-0.1
 and run: and run:
    $ alsactl --file asound.state.MIC.thru.test restore    $ alsactl --file asound.state.MIC.thru.test restore
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 ---- ----
 ==== Test ==== ==== Test ====
-For testing follow the instructions on [[https://github.com/Audio-Injector/stereo-and-zero]]. Then install sox:+For the 10 kHz test follow the instructions on [[https://github.com/Audio-Injector/stereo-and-zero]].\\ 
 +Then install sox:
    $ sudo apt install sox    $ sudo apt install sox
 In /home/pi/stereo-and-zero-master/ run: In /home/pi/stereo-and-zero-master/ run:
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 ---- ----
-==== I2S Pins ==== +==== Simple Play and Record ==== 
-Beside the power and ground the I2S bus needs the following pins: +Recording:\\ 
-   GPIO 18 (Pin12)    BITCLOCK; +   $ arecord -r 48000 -f S16_LE -c 2 -d 20 test.wav 
-   GPIO 19 (Pin 35)   LRCLOCK; +Playing back:\\ 
-   GPIO 20 (Pin 38)   DATA IN; +   $ aplay test.wav 
-   GPIO 21 (Pin 40)   DATA OUT;+ 
 +---- 
 +==== I2S and I2C Pins ==== 
 + 
 +The following pins are used by the sound card, don't use them for anything else!\\ 
 +Beside the power (5V and 3V3) and ground (GND) the I2S bus needs the following pins: 
 +   GPIO 18 (Pin12)    BIT CLOCK (BCLK); 
 +   GPIO 19 (Pin 35)   IN and OUT LR CLOCK (DACLRC and ADCLRC); 
 +   GPIO 20 (Pin 38)   DATA IN (ADCDAT); 
 +   GPIO 21 (Pin 40)   DATA OUT (DACDAT); 
 +And the I2C bus needs these pins: 
 +   GPIO 02 (pin 03)   SDIN 
 +   GPIO 03 (pin 05)   SCLK
  
 <html> <html>
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 </html> </html>
  
-graphic from: +//graphic from: 
-[[https://hifiduino.wordpress.com/2014/11/13/raspberry-pi-b-digital-audio/]]\\+[[https://hifiduino.wordpress.com/2014/11/13/raspberry-pi-b-digital-audio/]]//\\
  
 ---- ----
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 [[https://github.com/Audio-Injector/stereo-and-zero]]\\ [[https://github.com/Audio-Injector/stereo-and-zero]]\\
 [[https://learn.adafruit.com/adafruit-max98357-i2s-class-d-mono-amp/raspberry-pi-usage]]\\ [[https://learn.adafruit.com/adafruit-max98357-i2s-class-d-mono-amp/raspberry-pi-usage]]\\
 +[[https://www.richardmudhar.com/blog/2018/07/raspberry-pi-zero-audio-recording-with-the-audioinjector-hat/]]\\
  
 ---- ----