building volumio with Octo support

[flatmax]

This post will build volumio with Octo support ... I will do this all on a debian or related operating system ... if you aren't using Linux, well - what can I say ?

Following instructions from here :

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https://github.com/volumio/Build

Setup prereqs :

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sudo apt install git squashfs-tools kpartx multistrap qemu-user-static samba debootstrap parted dosfstools qemu binfmt-support qemu-utils

Clone and configure the volumio build system :

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git clone https://github.com/volumio/Build.git
cd Build

Now set the image creation into life :

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sudo ./build.sh -b arm -d pi -v 2.0 -l reponame

Once built, you will end up with the following file (similarly named) in the driectory :

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$ ls -l Volumio2.0-2017-07-23-pi.img 
-rw-r--r-- 1 root root 2936012800 Jul 23 14:16 Volumio2.0-2017-07-23-pi.img

I put an SDCARD into my computer and the operating system auto mounts it ... I firstly need to unmount it. In my case :

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$ mount
... SNIP ...
/dev/sdd3 on /media/flatmax/volumio_data type ext4 (rw,nosuid,nodev,relatime,stripe=1024,data=ordered,uhelper=udisks2)
/dev/sdd1 on /media/flatmax/boot type vfat (rw,nosuid,nodev,relatime,uid=1000,gid=1000,fmask=0022,dmask=0022,codepage=437,iocharset=iso8859-1,shortname=mixed,showexec,utf8,flush,errors=remount-ro,uhelper=udisks2)
/dev/sdd2 on /media/flatmax/volumio type ext4 (rw,nosuid,nodev,relatime,stripe=1024,data=ordered,uhelper=udisks2)

To unmount /dev/sdd1 sdd2 and sdd3 :

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sudo umount /dev/sdd[123]

You can use dd to write the volumio .img file to SDCARD or you can right click on it and use the disk image writer. Once written, pop it into your Pi and turn it on !

Once on, it boots login with the user name root and pass volumio. It gives you the following prompt :


I enable ssh access by creating an empty file in /boot :

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cat '' > /boot/ssh

I create a user audioinjector:

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adduser audioinjector

I can now log in here is what I see :

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$ ssh audioinjector@192.168.0.9
audioinjector@192.168.0.9's password: 
                       ___                                      
                      /\_ \                        __           
         __  __    ___\//\ \    __  __    ___ ___ /\_\    ___   
        /\ \/\ \  / __`\\ \ \  /\ \/\ \ /' __` __`\/\ \  / __`\ 
        \ \ \_/ |/\ \L\ \\_\ \_\ \ \_\ \/\ \/\ \/\ \ \ \/\ \L\ \
         \ \___/ \ \____//\____\\ \____/\ \_\ \_\ \_\ \_\ \____/
          \/__/   \/___/ \/____/ \/___/  \/_/\/_/\/_/\/_/\/___/ 
        
             Free Audiophile Linux Music Player - Version 2.0

          C 2015 Michelangelo Guarise - Volumio Team - Volumio.org
                               

Volumio Debian GNU/Linux comes with ABSOLUTELY NO WARRANTY, to the extent
permitted by applicable law.

I switch to superuser :

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su

I can now do anything I want ... such as adding the octo's device tree for boot up :

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echo 'dtoverlay=audioinjector-addons' >> /boot/config.txt

Sure enough, I reboot and the sound card is recognised :

root@volumio:/home/audioinjector# dmesg | grep octo

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[   11.914759] audioinjector-octo soc:sound: ASoC: CPU DAI (null) not registered - will retry
[   11.914776] audioinjector-octo soc:sound: snd_soc_register_card failed (-517)
[   13.477351] audioinjector-octo soc:sound: cs42448 <-> 3f203000.i2s mapping ok

I setup my asoundrc to ensure I can play/record any thing between 1 and 8 channels :

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echo 'pcm.!default {
        type plug
        slave.pcm "anyChannelCount"
}

ctl.!default {
        type hw
        card 0
}

pcm.anyChannelCount {
    type route
    slave.pcm "hw:0"
    slave.channels 8;
    ttable {
           0.0 1
           1.1 1
           2.2 1
           3.3 1
           4.4 1
           5.5 1
           6.6 1
}' > /etc/asound.conf

I check that I can see the anychannelcount plugin like so :

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root@volumio:/home/audioinjector# aplay -L | grep -C 1 anyCh
default
anyChannelCount
sysdefault:CARD=ALSA

I test play a track by installing mplayer first :

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apt install mplayer

I then play a track from the web :

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wget "https://mp3l.jamendo.com/?trackid=206413&format=mp31&from=app-97dab294" -O - | mplayer -

and it works !!!!

I secure my volumio system again by turning off ssh :

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rm /boot/ssh
reboot

Matt

[Painter1234]

Would this build work with the stereo version of the card ? What would need changing?

[Painter1234]

How could this be done for the stereo board?

[flatmax]

It would work. The only changes would be to /boot/config.txt and .asoundrc. You can find the setup for those on this thread :
http://forum.audioinjector.net/viewtopic.php?f=5&t=3

I would like to do a similar setup for the stereo card ... it is possible you don't need to compile it, simply put :

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 dtoverlay=audioinjector-wm8731-audio

into the /boot/config.txt on the stock standard volumio, however that still has to be tested.