diff --git a/stage2/01-sys-tweaks/01-run.sh b/stage2/01-sys-tweaks/01-run.sh
index 40041e5..d67d48c 100755
--- a/stage2/01-sys-tweaks/01-run.sh
+++ b/stage2/01-sys-tweaks/01-run.sh
@@ -241,6 +241,40 @@ sudo npm i
 
 
 
+
+## GPS  https://www.raspberrypi.org/forums/viewtopic.php?p=947968#p947968
+echo "========== Install GPS  ============"
+sudo apt-get install gpsd gpsd-clients cmake subversion build-essential espeak freeglut3-dev imagemagick libdbus-1-dev libdbus-glib-1-dev libdevil-dev libfontconfig1-dev libfreetype6-dev libfribidi-dev libgarmin-dev libglc-dev libgps-dev libgtk2.0-dev libimlib2-dev libpq-dev libqt4-dev libqtwebkit-dev librsvg2-bin libsdl-image1.2-dev libspeechd-dev libxml2-dev ttf-liberation -y
+
+sudo pip install pyserial
+
+
+echo "" >> /boot/config.txt
+echo "core_freq=250" >> /boot/config.txt
+echo "enable_uart=1" >> /boot/config.txt
+
+echo "dwc_otg.lpm_enable=0  console=tty1 root=/dev/mmcblk0p2 rootfstype=ext4  elevator=deadline fsck.repair=yes   rootwait" > /boot/cmdline.txt
+
+
+
+# 3)Run
+sudo systemctl stop serial-getty@ttyS0.service
+sudo systemctl disable serial-getty@ttyS0.service
+sudo systemctl stop gpsd.socket
+sudo systemctl disable gpsd.socket
+
+# reboot
+
+# 5) Execute the daemon reset
+sudo killall gpsd
+sudo gpsd /dev/ttyS0 -F /var/run/gpsd.sock
+
+
+
+
+
+
+
 echo "========== Downloading and installing OpenCV ============"
 cd /
 # git clone https://github.com/Itseez/opencv.git --depth 1
diff --git a/stage2/01-sys-tweaks/02-I2S.sh b/stage2/01-sys-tweaks/02-I2S.sh
new file mode 100755
index 0000000..82d570a
--- /dev/null
+++ b/stage2/01-sys-tweaks/02-I2S.sh
@@ -0,0 +1,388 @@
+#!/bin/bash
+
+: <<'DISCLAIMER'
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
+OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
+HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+OTHER DEALINGS IN THE SOFTWARE.
+
+This script is licensed under the terms of the MIT license.
+Unless otherwise noted, code reproduced herein
+was written for this script.
+
+- The Pimoroni Crew - (modified by Adafruit!)
+
+DISCLAIMER
+
+# script control variables
+
+productname="i2s amplifier" # the name of the product to install
+scriptname="i2samp" # the name of this script
+spacereq=1 # minimum size required on root partition in MB
+debugmode="no" # whether the script should use debug routines
+debuguser="none" # optional test git user to use in debug mode
+debugpoint="none" # optional git repo branch or tag to checkout
+forcesudo="no" # whether the script requires to be ran with root privileges
+promptreboot="no" # whether the script should always prompt user to reboot
+mininstall="no" # whether the script enforces minimum install routine
+customcmd="yes" # whether to execute commands specified before exit
+armhfonly="yes" # whether the script is allowed to run on other arch
+armv6="yes" # whether armv6 processors are supported
+armv7="yes" # whether armv7 processors are supported
+armv8="yes" # whether armv8 processors are supported
+raspbianonly="no" # whether the script is allowed to run on other OSes
+osreleases=( "Raspbian" ) # list os-releases supported
+oswarning=( "Debian" "Kano" "Mate" "PiTop" "Ubuntu" ) # list experimental os-releases
+osdeny=( "Darwin" "Kali" ) # list os-releases specifically disallowed
+
+FORCE=$1
+DEVICE_TREE=true
+ASK_TO_REBOOT=false
+CURRENT_SETTING=false
+UPDATE_DB=false
+
+BOOTCMD=/boot/cmdline.txt
+CONFIG=/boot/config.txt
+APTSRC=/etc/apt/sources.list
+INITABCONF=/etc/inittab
+BLACKLIST=/etc/modprobe.d/raspi-blacklist.conf
+LOADMOD=/etc/modules
+DTBODIR=/boot/overlays
+
+# function define
+
+prompt() {
+        read -r -p "$1 [y/N] " response < /dev/tty
+        if [[ $response =~ ^(yes|y|Y)$ ]]; then
+            true
+        else
+            false
+        fi
+}
+
+success() {
+    echo -e "$(tput setaf 2)$1$(tput sgr0)"
+}
+
+inform() {
+    echo -e "$(tput setaf 6)$1$(tput sgr0)"
+}
+
+warning() {
+    echo -e "$(tput setaf 1)$1$(tput sgr0)"
+}
+
+newline() {
+    echo ""
+}
+
+progress() {
+    count=0
+    until [ $count -eq $1 ]; do
+        echo -n "..." && sleep 1
+        ((count++))
+    done
+    echo
+}
+sudocheck() {
+    if [ $(id -u) -ne 0 ]; then
+        echo -e "Install must be run as root. Try 'sudo ./$scriptname'\n"
+        exit 1
+    fi
+}
+
+sysclean() {
+    sudo apt-get clean && sudo apt-get autoclean
+    sudo apt-get -y autoremove &> /dev/null
+}
+
+sysupdate() {
+    if ! $UPDATE_DB; then
+        echo "Updating apt indexes..." && progress 3 &
+        sudo apt-get update 1> /dev/null || { warning "Apt failed to update indexes!" && exit 1; }
+        echo "Reading package lists..."
+        progress 3 && UPDATE_DB=true
+    fi
+}
+
+sysupgrade() {
+    sudo apt-get upgrade
+    sudo apt-get clean && sudo apt-get autoclean
+    sudo apt-get -y autoremove &> /dev/null
+}
+
+sysreboot() {
+    warning "Some changes made to your system require"
+    warning "your computer to reboot to take effect."
+    newline
+    if prompt "Would you like to reboot now?"; then
+        sync && sudo reboot
+    fi
+}
+
+arch_check() {
+    IS_ARMHF=false
+    IS_ARMv6=false
+
+    if uname -m | grep "armv.l" > /dev/null; then
+        IS_ARMHF=true
+        if uname -m | grep "armv6l" > /dev/null; then
+            IS_ARMv6=true
+        fi
+    fi
+}
+
+os_check() {
+    IS_RASPBIAN=false
+    IS_MACOSX=false
+    IS_SUPPORTED=false
+    IS_EXPERIMENTAL=false
+
+    if [ -f /etc/os-release ]; then
+        if cat /etc/os-release | grep "Raspbian" > /dev/null; then
+            IS_RASPBIAN=true && IS_SUPPORTED=true
+        fi
+        if command -v apt-get > /dev/null; then
+            for os in ${osreleases[@]}; do
+                if cat /etc/os-release | grep $os > /dev/null; then
+                    IS_SUPPORTED=true && IS_EXPERIMENTAL=false
+                fi
+            done
+            for os in ${oswarning[@]}; do
+                if cat /etc/os-release | grep $os > /dev/null; then
+                    IS_SUPPORTED=false && IS_EXPERIMENTAL=true
+                fi
+            done
+            for os in ${osdeny[@]}; do
+                if cat /etc/os-release | grep $os > /dev/null; then
+                    IS_SUPPORTED=false && IS_EXPERIMENTAL=false
+                fi
+            done
+        fi
+    fi
+    if [ -d ~/.kano-settings ] || [ -d ~/.kanoprofile ]; then
+        IS_RASPBIAN=false
+        for os in ${oswarning[@]}; do
+            if [ $os == "Kano" ]; then
+                IS_SUPPORTED=false && IS_EXPERIMENTAL=true
+            fi
+        done
+        for os in ${osdeny[@]}; do
+            if [ $os == "Kano" ]; then
+                IS_SUPPORTED=false && IS_EXPERIMENTAL=false
+            fi
+        done
+    fi
+    if [ -f ~/.pt-dashboard-config ] || [ -d ~/.pt-dashboard ]; then
+        IS_RASPBIAN=false
+        for os in ${oswarning[@]}; do
+            if [ $os == "PiTop" ]; then
+                IS_SUPPORTED=false && IS_EXPERIMENTAL=true
+            fi
+        done
+        for os in ${osdeny[@]}; do
+            if [ $os == "PiTop" ]; then
+                IS_SUPPORTED=false && IS_EXPERIMENTAL=false
+            fi
+        done
+    fi
+    if [ -d ~/.config/ubuntu-mate ]; then
+        for os in ${osdeny[@]}; do
+            if [ $os == "Mate" ]; then
+                IS_SUPPORTED=false && IS_EXPERIMENTAL=false
+            fi
+        done
+    fi
+    if uname -s | grep "Darwin" > /dev/null; then
+        IS_MACOSX=true
+        for os in ${osdeny[@]}; do
+            if [ $os == "Darwin" ]; then
+                IS_SUPPORTED=false && IS_EXPERIMENTAL=false
+            fi
+        done
+    fi
+}
+
+raspbian_check() {
+    IS_SUPPORTED=false
+    IS_EXPERIMENTAL=false
+
+    if [ -f /etc/os-release ]; then
+        if cat /etc/os-release | grep "/sid" > /dev/null; then
+            IS_SUPPORTED=false && IS_EXPERIMENTAL=true
+        elif cat /etc/os-release | grep "stretch" > /dev/null; then
+            IS_SUPPORTED=false && IS_EXPERIMENTAL=true
+        elif cat /etc/os-release | grep "jessie" > /dev/null; then
+            IS_SUPPORTED=true && IS_EXPERIMENTAL=false
+        elif cat /etc/os-release | grep "wheezy" > /dev/null; then
+            IS_SUPPORTED=true && IS_EXPERIMENTAL=false
+        else
+            IS_SUPPORTED=false && IS_EXPERIMENTAL=false
+        fi
+    fi
+}
+
+: <<'MAINSTART'
+
+Perform all global variables declarations as well as function definition
+above this section for clarity, thanks!
+
+MAINSTART
+
+# checks and init
+
+arch_check
+os_check
+
+if [ $debugmode != "no" ]; then
+    echo "USER_HOME is $USER_HOME" && newline
+    echo "IS_RASPBIAN is $IS_RASPBIAN"
+    echo "IS_MACOSX is $IS_MACOSX"
+    echo "IS_SUPPORTED is $IS_SUPPORTED"
+    echo "IS_EXPERIMENTAL is $IS_EXPERIMENTAL"
+    newline
+fi
+
+if ! $IS_ARMHF; then
+    warning "This hardware is not supported, sorry!"
+    warning "Config files have been left untouched"
+    newline && exit 1
+fi
+
+if $IS_ARMv8 && [ $armv8 == "no" ]; then
+    warning "Sorry, your CPU is not supported by this installer"
+    newline && exit 1
+elif $IS_ARMv7 && [ $armv7 == "no" ]; then
+    warning "Sorry, your CPU is not supported by this installer"
+    newline && exit 1
+elif $IS_ARMv6 && [ $armv6 == "no" ]; then
+    warning "Sorry, your CPU is not supported by this installer"
+    newline && exit 1
+fi
+
+if [ $raspbianonly == "yes" ] && ! $IS_RASPBIAN;then
+        warning "This script is intended for Raspbian on a Raspberry Pi!"
+        newline && exit 1
+fi
+
+if $IS_RASPBIAN; then
+    raspbian_check
+    if ! $IS_SUPPORTED && ! $IS_EXPERIMENTAL; then
+        newline && warning "--- Warning ---" && newline
+        echo "The $productname installer"
+        echo "does not work on this version of Raspbian."
+        echo "Check https://github.com/$gitusername/$gitreponame"
+        echo "for additional information and support"
+        newline && exit 1
+    fi
+fi
+
+if ! $IS_SUPPORTED && ! $IS_EXPERIMENTAL; then
+        warning "Your operating system is not supported, sorry!"
+        newline && exit 1
+fi
+
+if $IS_EXPERIMENTAL; then
+    warning "Support for your operating system is experimental. Please visit"
+    warning "forums.adafruit.com if you experience issues with this product."
+    newline
+fi
+
+if [ $forcesudo == "yes" ]; then
+    sudocheck
+fi
+
+newline
+echo "This script will install everything needed to use"
+echo "$productname"
+newline
+
+newline
+echo "Checking hardware requirements..."
+
+if [ -e $CONFIG ] && grep -q "^device_tree=$" $CONFIG; then
+    DEVICE_TREE=false
+fi
+
+if $DEVICE_TREE; then
+
+    newline
+    echo "Adding Device Tree Entry to $CONFIG"
+
+    if [ -e $CONFIG ] && grep -q "^dtoverlay=hifiberry-dac$" $CONFIG; then
+        echo "dtoverlay already active"
+    else
+        echo "dtoverlay=hifiberry-dac" | sudo tee -a $CONFIG
+        ASK_TO_REBOOT=true
+    fi
+
+    if [ -e $BLACKLIST ]; then
+        newline
+        echo "Commenting out Blacklist entry in "
+        echo "$BLACKLIST"
+        sudo sed -i -e "s|^blacklist[[:space:]]*i2c-bcm2708.*|#blacklist i2c-bcm2708|" \
+                    -e "s|^blacklist[[:space:]]*snd-soc-pcm512x.*|#blacklist snd-soc-pcm512x|" \
+                    -e "s|^blacklist[[:space:]]*snd-soc-wm8804.*|#blacklist snd-soc-wm8804|" $BLACKLIST &> /dev/null
+    fi
+else
+    newline
+    echo "No Device Tree Detected, not supported"
+    newline
+    exit 1
+fi
+
+if [ -e $CONFIG ] && grep -q -E "^dtparam=audio=on$" $CONFIG; then
+    bcm2835off="no"
+    newline
+    echo "Disabling default sound driver"
+    sudo sed -i "s|^dtparam=audio=on$|#dtparam=audio=on|" $CONFIG &> /dev/null
+    if [ -e $LOADMOD ] && grep -q "^snd-bcm2835" $LOADMOD; then
+        sudo sed -i "s|^snd-bcm2835|#snd-bcm2835|" $LOADMOD &> /dev/null
+    fi
+    ASK_TO_REBOOT=true
+elif [ -e $LOADMOD ] && grep -q "^snd-bcm2835" $LOADMOD; then
+    bcm2835off="no"
+    newline
+    echo "Disabling default sound module"
+    sudo sed -i "s|^snd-bcm2835|#snd-bcm2835|" $LOADMOD &> /dev/null
+    ASK_TO_REBOOT=true
+else
+    newline
+    echo "Default sound driver currently not loaded"
+    bcm2835off="yes"
+fi
+
+echo "Configuring sound output"
+if [ -e /etc/asound.conf ]; then
+    if [ -e /etc/asound.conf.old ]; then
+        sudo rm -f /etc/asound.conf.old
+    fi
+    sudo mv /etc/asound.conf /etc/asound.conf.old
+fi
+sudo echo -e "pcm.\041default {\n type hw\n card 0\n}" > ~/asound.conf
+sudo echo -e "ctl.\041default {\n type hw\n card 0\n}" >> ~/asound.conf
+sudo mv ~/asound.conf /etc/asound.conf
+
+if [ $bcm2835off == "yes" ]; then
+    newline
+    echo "We can now test your $productname"
+    warning "Set your speakers at a low volume!"
+    if confirm "Do you wish to test your system now?"; then
+        echo "Testing..."
+        speaker-test -l5 -c2 -t wav
+    fi
+fi
+newline
+success "All done!"
+newline
+echo "Enjoy your new $productname!"
+newline
+
+
+
+exit 0
\ No newline at end of file