Raspian Buster

How to setup a Pi3b to be a NAA using Buster Lite as the OS

download last Buster lite version zip file from:

https://www.raspberrypi.org/downloads/raspbian/

http://downloads.raspberrypi.org/raspbian_lite/images/raspbian_lite-2019-04-09/

Unzip file

write to sd card with Etcher

Copy 0 length (empty) file named "ssh" (not ssh.txt) to /boot to enable SSH

Install micro sd card in pi and power on with ethernet connected.

Find ip address (I find from my router) and make ssh terminal connection

sudo raspi-config

select Change User Password and change password

Finish to exit

1) Install latest OS updates

sudo apt-get update

sudo apt-get -y dist-upgrade

2) Install necessary dependencies (alsa-utils is optional, but the utilities are helpful sometimes). I'm not sure you need to do this, seems like they were already there

sudo apt-get install libasound2 alsa-utils

3) Download the latest networkaudiod deb package for armhf architecture using “wget”. You should go to https://www.signalyst.eu/bins/naa/linux/stretch/

and see if there is a new version. As of Oct 20,2019, this is latest.

wget  https://www.signalyst.eu/bins/naa/linux/stretch/networkaudiod_3.6.0-42_armhf.deb

4) Install the package (correct the version number to what ever is latest at the time)

sudo dpkg -i networkaudiod_3.6.0-42_armhf.deb

Tab, then OK to install

reboot

sudo reboot

To check if NAA software is running:

sudo systemctl status networkaudiod

Control and c and same time to exit

If you have a problem, you get something like this:

networkaudiod.service: Failed with result 'signal'

Otherwise, something like this if working:

Oct 05 14:54:42 raspberrypi systemd[1]: Started Network Audio Adapter daemon.

Oct 05 14:54:43 raspberrypi networkaudiod[493]: [/usr/sbin/networkaudiod] (493): asoundlib version: 1.1.8

Oct 05 14:54:43 raspberrypi networkaudiod[493]: [/usr/sbin/networkaudiod] (493): clSocket::SetOption(): setsockopt(): No such device

Oct 05 14:54:44 raspberrypi networkaudiod[493]: [/usr/sbin/networkaudiod] (493): clSocket::SetOption(): setsockopt(): No such device

Oct 05 14:54:45 raspberrypi networkaudiod[493]: [/usr/sbin/networkaudiod] (493): clSocket::SetOption(): setsockopt(): No such device

Oct 05 14:54:46 raspberrypi networkaudiod[493]: [/usr/sbin/networkaudiod] (493): clSocket::SetOption(): setsockopt(): No such device

Turn on dac, config for Hifiberry Dacplus (add dtoverlay=hifiberry-dacplus to /boot/config.txt)

sudo nano /boot/config.txt

Add line

dtoverlay=hifiberry-dacplus

Add # in front of dtparam=audio=on. This turns off pi internal audio.

#dtparam=audio=on

Exit and save, then reboot

sudo reboot

After it comes back, check for audio device

aplay -l

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

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

Subdevices: 1/1

Subdevice #0: subdevice #0

Tweaks

For some of the changes, reference https://www.runeaudio.com/forum/tweaking-the-audio-performance-rpi3-t4301.html

sudo nano /boot/config.txt

Reference page for config.txt https://elinux.org/RPiconfig

add lines to config.txt to disable wifi, bluetooth

# Disable wifi

dtoverlay=pi3-disable-wifi

# Disable bluetooth

dtoverlay=pi3-disable-bt

Add lines below to config.txt to underclock and undervolt

disable pvt (temperature measurements) and avoid PWM_PLL

reference https://github.com/raspberrypi/firmware/issues/497

# underclock and undervolt settings

force_turbo=1

arm_freq=800

#arm_freq_min=400

# arm freq 400 and other 3 at 200 are ok with dietpi

#gpu_freq=200

#core_freq=200

#sdram_freq=200

# over voltage -3 is ok

#over_voltage=-3

#over_voltage_min=-5

#over_voltage_sdram=-3

#following four lines ok

#sdram_schmoo=0x02000020

#over_voltage_sdram_p=-5

#over_voltage_sdram_i=-14

#over_voltage_sdram_c=-6

# Force max current to USB 0=OFF (600mA) 1=ON (1.2A)

max_usb_current=0

gpu_mem=16

disable_l2cache=0

disable_pvt=1

force_turbo=1

avoid_pwm_pll=1

install Linux Audio Adjustments

https://github.com/dynobot/Linux-Audio-Adjustments

wget https://github.com/dynobot/Linux-Audio-Adjustments/raw/master/basic-install.sh

chmod 755 basic-install.sh

sudo ./basic-install.sh

edit rc.local and turn off hdmi, leds, ...

sudo nano /etc/rc.local

Add lines so it looks like this, note that "/usr/bin/Sound.sh" line should be near top.

#call Linux Audio Adjustments script

/usr/bin/Sound.sh

#turn off HDMI

sudo /opt/vc/bin/tvservice -o

#Power LED off

sudo sh -c 'echo 0 > /sys/class/leds/led1/brightness'

sudo sh -c 'echo none > /sys/class/leds/led1/trigger'

#Activity LED off

sudo sh -c 'echo 0 > /sys/class/leds/led0/brightness'

sudo nano /boot/cmdline.txt

Add lines after the long first line:

dwc_otg.microframe_schedule=0

dwc_otg.nak_holdoff_enable=1

dwc_otg.fiq_fix_enable=0

smsc95xx.turbo_mode=N

dwc_otg.lpm_enable=0

If wifi, turn off ethernet and usb ports

sudo nano /usr/bin/Sound.sh

Uncomment line:

echo 0x0 > /sys/devices/platform/soc/3f980000.usb/buspower

exit and save

Ethernet version

Install hub-cntl, need to install a couple other programs first

sudo apt-get install libusb-dev git

git clone https://github.com/codazoda/hub-ctrl.c

cd hub-ctrl.c

gcc -o hub-ctrl hub-ctrl.c -lusb

Copy hub-ctrl program to /bin so it can be executed

sudo cp hub-ctrl /bin

cd ..

turn off all usb port

sudo ./hub-ctrl -h 0 -P 2 -p 0

check

lsusb

Set to Ethernet to 100 mb to save power

sudo nano /etc/network/interfaces

auto lo

iface lo inet loopback

auto eth0

allow-hotplug eth0

iface eth0 inet dhcp

        link-speed 100

        link-duplex full

Check which processes are running

ps aux

real time processes

htop

Display temperature

vcgencmd measure_temp

Removing applications:

apt remove --purge [app]

sudo apt remove --purge avahi-daemon

Assign to a core

To find PID for networkaudiod

pgrep networkaudiod

422

or pidof networkaudiod

ps aux

USER PID %CPU %MEM VSZ RSS TTY STAT START TIME COMMAND

root 423 1.8 0.7 19032 7660 ? S<Ls 00:38 18:07 /usr/sbin/networkaudiod

Note PID = 423 this time, changed after reboot

ps aux | grep -i networkaudiod

To isolate a cpu core you have to edit /boot/cmdline.txt:

sudo nano /boot/cmdline.txt

add line

isolcpus=3

reboot

htop

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