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나중 참고를 위해 저장된 글임.

 

 

아래 글은 A list of Raspberry Pi compatible DACs

 

 

https://rataks.com/blog/a-list-of-raspberry-pi-compatible-dacs.html

 


 

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이것도 좋은 자료인 듯.

 

 

https://hifiduino.wordpress.com/2014/11/12/raspberry-pi-version-b/

 

 

 

Here is a list of DAC boards available for the Raspberry Pi (versus none for the BeagleBone Black as of this writing)

 

 


Notes:

  1. Notice that the DAC chips used are the ones that can cope without a Master Clock. RPi I2S does not Master Clock, so the DACs synch on bitclock and generate their own master clock.
  2. Products using PCM 5122 can use the DAC's internal volume control and therefore can be connected directly to an amplifier.
  3. There are companies such as diyinhk and curryman that are not listed because they do not specifically make DAC boards that conform to the RPi footprint but are fully functional as I2S DACs. Any I2S DAC that does not require master clock will work.

    My Favorite ones are the HIFIBerry DAC+ and the IQAudio PiDAC+, both based on the PCM 5122 with "hardware" volume control (meaning using the volume control in the DAC itself) 

     

     

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    https://github.com/guussie/PiDS/wiki/09.-How-to-make-various-DACs-work

    09. How to make various DACs work

    guussie edited this page on 13 Feb · 26 revisions

    Disable on-board sound

    sudo nano /etc/modprobe.d/alsa-blacklist.conf

    Enter the following text:

    blacklist snd_bcm2835

    Ctrl-X, Enter

    Hifiberry DAC+

    You can buy this DAC here:

    Hifiberry DAC+

    Source: HifiBerry installation instructions

    sudo nano /etc/modprobe.d/raspi-blacklist.conf

    Remove or comment (#) the following lines:

    blacklist i2c-bcm2708

    blacklist snd-soc-pcm512x

    blacklist snd-soc-wm8804

    Edit modules:

    sudo nano /etc/modules

    Remove or comment (#) the line:

    snd_bcm2835

    Edit /boot/config.txt

    sudo nano /boot/config.txt

    Add the following line:

    dtoverlay=hifiberry-dacplus

    Some alsa configuration:

    sudo nano /etc/asound.conf

    Paste the text below:

    pcm.!default {

    type hw card 0

    }

    ctl.!default {

    type hw card 0

    }

    Reboot

    sudo reboot

    Test if everything is OK:

    aplay -l

    You should see this:

    pi@raspberrypi ~ $ aplay -l

    **** List of PLAYBACK Hardware Devices ****

    card 0: sndrpihifiberry [snd_rpi_hifiberry_dac], device 0: HifiBerry DAC HiFi pcm5102a-hifi-0 []

    Subdevices: 1/1

    Subdevice #0: subdevice #0

    Note the HifiBerry DAC+ uses GPIO 18-21, so don't use these pins for anything else, such as LIRC.

    Make all changes to /etc/mpd.conf as described in "Build the software".

    Install mediaplayer as described in "Build the software".

    GPIO pin usage:

    HiFiBerry DAC

    Only the pins on the P5 header are used for the HiFiBerry DAC

    HiFiBerry Digi and Amp

    GPIO2-3 are used by our products for configuration. If you are experienced with I2C, you might add other slave devices, if you a a novice, we don't recommend this at all. GPIOs 28-31 are used for the sound interface. You can't use them for any other purpose.

    HiFiBerry DAC+, Digi+ and Amp+

    GPIO2-3 are used by our products for configuration. If you are experienced with I2C, you might add other slave devices, if you a a novice, we don't recommend this at all. GPIOs 18-21 are used for the sound interface. You can't use them for any other purpose.

    Cirrus-Wolfson DAC

    Before you decide to buy this DAC, think about it twice. This board has very extensive sound related capabilities but is very difficult to work with. It is likely that it will not cooperate well with other functionality you may want to build into your system. The sound quality of this DAC is very good, but if you only need sound output, I strongly suggest you use another DAC board.

    You can buy this DAC here:

    Cirrus-Wolfson DAC at Element 14

    Start with the latest installation of wheezy as described in "Build the software".

    Source: https://blog.georgmill.de/2015/02/18/update-for-wolfson-audio-card-on-raspberry-pi/

    wget https://blog.georgmill.de/wp-content/uploads/2015/02/linux-image-3.12.33-rt47-georg_3.12.33-rt47-georg-1_armhf.deb

    dpkg -i linux-image-3.12.33-rt47-georg_3.12.33-rt47-georg-1_armhf.deb

    sudo mv /boot/vmlinuz-3.12.33-rt47-georg /boot/kernel-rt-georg.img

    sudo nano /boot/config.txt

    Change or add this line:

    kernel=kernel-rt-georg.img

    Edit modules:

    sudo nano /etc/modules

    and change OR add these lines:

    spi-bcm2708

    i2c-bcm2708

    arizona-spi

    snd-soc-wm5102

    snd-soc-pcm5102a

    snd-soc-wm8804

    snd-soc-rpi-wsp

    snd-soc-rpi-wsp

       

    bcm2708-rng

    snd-bcm2835

    gpio_arizona

    arizona_micsupp

    snd_soc_bcm2708_i2s

    snd-soc-arizona

    snd-soc-wm-adsp

    snd-soc-wm5102

    snd-soc-rpi-wsp

    Edit blacklist:

    sudo nano /etc/modprobe.d/raspi-blacklist.conf

    and change OR add these lines:

    #blacklist spi-bcm2708

    #blacklist i2c-bcm2708

    blacklist snd-soc-pcm512x

    #blacklist snd-soc-wm8804

    softdep arizona-spi pre: arizona-ld

    Edit cmdline.txt:

    sudo nano /boot/cmdline.txt

    and change OR add this line to the other boot params

    sdhci_bcm2708.enable_llm=0

    Reboot

    sudo shutdown -r now

    If everything runs o.k.

    uname -r

    should show

    3.12.33-rt47-georg

    Now you have to create a script that will tell the Raspberry Pi to output sound to the Wolfson DAC:

    mkdir use_case_scripts

    cd use_case_scripts

    sudo nano Playback_to_Lineout.sh

    Paste the text below:

    #!/bin/bash

       

    #Playback from AP to Headset

    amixer -Dhw:0 cset name='HPOUT2 Digital Switch' on

    amixer -Dhw:0 cset name='HPOUT2L Input 1' AIF1RX1

    amixer -Dhw:0 cset name='HPOUT2L Input 1 Volume' 32

    amixer -Dhw:0 cset name='HPOUT2R Input 1' AIF1RX2

    amixer -Dhw:0 cset name='HPOUT2R Input 1 Volume' 32

       

    # The following command can be used to test

    # aplay -Dhw:0 -r 44100 -c 2 -f S32_LE <file>

    Ctrl-X-Enter

    Make the file executable:

    sudo chmod +x Playback_to_Lineout.sh

    Run the script:

    ./Playback_to_Lineout.sh

    Make the changes permanent:

    sudo alsactl store

    Reboot:

    sudo reboot

    Test if everything is OK:

    aplay -l

    You should see this:

    **** List of PLAYBACK Hardware Devices ****

    card 0: sndrpiwsp [snd_rpi_wsp], device 0: WM5102 AiFi wm5102-aif1-0 []

    Subdevices: 1/1

    Subdevice #0: subdevice #0

    Make all changes to /etc/mpd.conf as described in "Build the software".

    Install mediaplayer as described in "Build the software".

    In case you want to add functionality through the GPIO pins, you can use the Extension Header on the Cirrus-Logic Audio Card.

    The available expansion header pins are:

    EXP pin

    RPi Pin

    GPIO

    1

    2

    5V

    2

    -

    3.3V

    7

    6

    GND

    8

    6

    GND

    13

    6

    GND

    14

    29

    5

    16

    22

    25

    17

    31

    6

    18

    32

    12

    19

    36

    16

    20

    37

    26

    It is possible to use the on-board volume control. However, at any volume setting above 70 there is very noticeable and horrible distortion.

    In order to activate the on-board volume control:

    sudo nano /etc/mpd.conf

    Change the appropriate settings as below:

    audio_output {

       

    type "alsa"

    name "Output"

    device "hw:0,0"

    mixer_control "HPOUT2 Digital"

    mixer_device "hw:0"

    mixer_index "0"

    dop "no"

    }

    Ctrl-X-Y-Enter.

    If you want to undo the volume control (for instance to avoid the terrible distortion), change the appropriate settings as below:

    audio_output {

       

    type "alsa"

    name "Output"

    device "hw:0,0"

    mixer_control "HPOUT2 Digital"

    mixer_device "hw:0"

    mixer_index "0"

    dop "no"

    }

    Ctrl-X-Y-Enter.

    Source: https://www.bostonenginerd.com/posts/getting-the-wolfson-audio-card-working-with-volumio/

    Sabre ESS9023 DAC with Raspberry Pi Model B

    Sources:

    Raspberry Pi Forum Raspberry Pi documentation

    This was tested with a Sabre ESS9023 DAC board from www.hifimediy.com that can be found here: Sabre ESS9023 DAC Board), in combination with a Raspberry Pi Model B.

    This instruction may also work for other DAC chips such as the PCM5102A. We tested the predecessor of this one: PCM5102A DAC

    The Raspberry Pi is running the 3.18 kernel, which deals with peripherals in a different way than previous kernels. This kernel uses the Device Tree mechanism.

    The Raspberry Pi Model B uses the P5 header. use the image below to connect your DAC to the P5 header. Notice that there is no connection for the master clock as the DAC contains a crystal that creates the master clock on the DAC board. The Raspberry Pi does not provide a master clock.

    sudo nano /etc/modules

    Comment out (#) the following line:

    snd_bcm2835

    Now we need to load the correct device tree file by editing /boot/config.txt:

    sudo nano /boot/config.txt

    Add the following lines at the end of the file:

    dtparam=i2c_arm=on

    dtparam=i2s=on

    dtoverlay=hifiberry-dac

    Save the file (Ctrl-X, Y, Enter)

    Create the sound.conf file as follows:

    sudo nano /etc/asound.conf

       

    pcm.!default {

    type hw card 0

    }

    ctl.!default {

    type hw card 0

    }

    Save the file (Ctrl-X, Y, Enter) and reboot

    sudo reboot

    After reboot, check if the DAC is selected as your sound card:

    aplay -l

    Make all changes to /etc/mpd.conf as described in "Build the software".

    Install mediaplayer as described in "Build the software".

    PiFi DAC+ (AliExpress)

    Note that this card has an IR receiver built in. The IR receiver is connected to GPIO26. Remove JP2 to disable the IR receiver.

    sudo nano /etc/modules

    Comment out (#) the following line:

    snd_bcm2835

    Add the following lines:

    bcm2708_dmaengine

    snd_soc_pcm512x

    snd_soc_hifiberry_dacplus

    snd_soc_bcm2708_i2s

    Now we need to load the correct device tree file by editing /boot/config.txt:

    sudo nano /boot/config.txt

    Add the following lines at the end of the file:

    dtparam=i2c_arm=on

    dtparam=i2s=on

    dtoverlay=hifiberry-dacplus

    Save the file (Ctrl-X, Y, Enter)

    Create the sound.conf file as follows:

    sudo nano /etc/asound.conf

       

    pcm.!default {

    type hw card 0

    }

    ctl.!default {

    type hw card 0

    }

    Save the file (Ctrl-X, Y, Enter) and reboot

    sudo reboot

    After reboot, check if the DAC is selected as your sound card:

    aplay -l

    You should see this:

    card 0: sndrpihifiberry [snd_rpi_hifiberry_dacplus], device 0: HiFiBerry DAC+ HiFi pcm512x-hifi-0

    Subdevices: 0/1

    Subdevice #0: subdevice #0

    Make all changes to /etc/mpd.conf as described in "Build the software".

    Install mediaplayer as described in "Build the software".

    GPIO Pin Usage:

    GPIO2-3 are used for configuration. GPIOs 18-21 are used for the sound interface. You can't use them for any other purpose.

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