diff --git a/buildroot-external/configs/rpi4_64-gui_defconfig b/buildroot-external/configs/rpi4_64-gui_defconfig
index 0e4b93c7..c0db087c 100644
--- a/buildroot-external/configs/rpi4_64-gui_defconfig
+++ b/buildroot-external/configs/rpi4_64-gui_defconfig
@@ -612,7 +612,6 @@ BR2_PACKAGE_USERLAND_TOOLS=y
 BR2_PACKAGE_VOCALFUSION=y
 BR2_PACKAGE_WIFI_CONNECT=y
 BR2_PACKAGE_WIRINGPI2=y
-BR2_PACKAGE_XVF3510=y
 BR2_PACKAGE_PYTHON_ADAPT_PARSER=y
 BR2_PACKAGE_PYTHON_ASTRAL=y
 BR2_PACKAGE_PYTHON_CLICK_DEFAULT_GROUP=y
@@ -701,7 +700,6 @@ BR2_PACKAGE_MYCROFT_SKILL_IP=y
 BR2_PACKAGE_MYCROFT_SKILL_JOKE=y
 BR2_PACKAGE_MYCROFT_SKILL_NAPTIME=y
 BR2_PACKAGE_MYCROFT_SKILL_NEWS=y
-BR2_PACKAGE_MYCROFT_SKILL_OSM=y
 BR2_PACKAGE_MYCROFT_SKILL_OVOS_COMMON_PLAY=y
 BR2_PACKAGE_MYCROFT_SKILL_OVOS_ENCLOSURE=y
 BR2_PACKAGE_MYCROFT_SKILL_OVOS_HOMESCREEN=y
diff --git a/buildroot-external/package/vocalfusion/app_xvf3510_int_spi_boot_v4_1_0.bin b/buildroot-external/package/vocalfusion/app_xvf3510_int_spi_boot_v4_1_0.bin
new file mode 100644
index 00000000..7a9ef5f6
Binary files /dev/null and b/buildroot-external/package/vocalfusion/app_xvf3510_int_spi_boot_v4_1_0.bin differ
diff --git a/buildroot-external/package/vocalfusion/vocalfusion.mk b/buildroot-external/package/vocalfusion/vocalfusion.mk
index a463916d..9536bafb 100644
--- a/buildroot-external/package/vocalfusion/vocalfusion.mk
+++ b/buildroot-external/package/vocalfusion/vocalfusion.mk
@@ -12,6 +12,13 @@ $(eval $(kernel-module))
 
 define VOCALFUSION_INSTALL_TARGET_CMDS
 	$(INSTALL) -D -m 0644 $(@D)/xvf3510.dtbo $(BINARIES_DIR)/overlays/
+
+	$(INSTALL) -D -m 755 $(BR2_EXTERNAL_OPENVOICEOS_PATH)/package/vocalfusion/xvf3510-flash \
+                $(TARGET_DIR)/usr/sbin/xvf3510-flash
+
+	mkdir -p $(TARGET_DIR)/usr/lib/firmware/xvf3510
+	$(INSTALL) -D -m 0644 $(BR2_EXTERNAL_OPENVOICEOS_PATH)/package/vocalfusion/app_xvf3510_int_spi_boot_v4_1_0.bin \
+                $(TARGET_DIR)/usr/lib/firmware/xvf3510/app_xvf3510_int_spi_boot_v4_1_0.bin
 endef
 
 $(eval $(generic-package))
diff --git a/buildroot-external/package/vocalfusion/xvf3510-flash b/buildroot-external/package/vocalfusion/xvf3510-flash
new file mode 100644
index 00000000..11e79f09
--- /dev/null
+++ b/buildroot-external/package/vocalfusion/xvf3510-flash
@@ -0,0 +1,209 @@
+#!/usr/bin/env python3
+# Copyright (c) 2019-2020, XMOS Ltd, All rights reserved
+# requires dtparam=spi=on in /boot/config.txt
+
+"""
+This script configures the XVF3510 board in boot from SPI slave and load a
+binary file. It requires a bin file as input parameter.
+"""
+
+import sys
+import os
+import time
+import argparse
+import spidev
+import RPi.GPIO as GPIO
+from smbus import SMBus
+from pathlib import Path
+
+if sys.version[0] != '3':
+    print("Run this script with Python 3")
+    sys.exit(1)
+
+def bit_reversed_byte(byte_to_reverse):
+    """
+    Function to reverse the bit-order of a byte
+
+    Args:
+        byte_to_reverse: byte to process
+
+    Retruns:
+        byte in reversed order
+    """
+    return int('{:08b}'.format(byte_to_reverse)[::-1], 2)
+
+def set_boot_sel():
+    """
+    Function to set XVF3510 board in SPI slave boot mode
+
+    Args:
+        None
+
+    Returns:
+        None
+    """
+
+    bus = SMBus(1)
+
+    # reset BOOT_SEL
+    bus.write_byte_data(0x20, 3, 0xFE)
+    bus.write_byte_data(0x20, 7, 0xFF)
+
+    state = {}
+    for i in [2, 6]:
+        state[i] = bus.read_byte_data(0x20, i)
+
+    # start reset
+    data_to_write = 0x00 | (state[2] & 0xDF)
+    bus.write_byte_data(0x20, 2, data_to_write)
+    data_to_write = 0x00 | (state[6] & 0xDF)
+    bus.write_byte_data(0x20, 6, data_to_write)
+    # set BOOT_SEL high
+    data_to_write = 0x01
+    bus.write_byte_data(0x20, 3, data_to_write)
+    data_to_write = 0xFE
+    bus.write_byte_data(0x20, 7, data_to_write)
+    # stop reset
+    data_to_write = 0x20 | (state[2] & 0xDF)
+    bus.write_byte_data(0x20, 2, data_to_write)
+    data_to_write = 0x20 | (state[6] & 0xDF)
+    bus.write_byte_data(0x20, 6, data_to_write)
+
+
+
+def send_image(bin_filename, verbose=False, max_spi_speed_mhz = 5, block_transfer_pause_ms = 1, direct = False, delay = False):
+    """
+    Function to send the given image to the device via SPI slave
+
+    Args:
+        bin_filename:   binary file containing the image to boot
+        verbose:        flag to print debug printouts
+        direct:         Use Pi GPIO outputs rather than the XVF3510 Pi HAT
+        delay:          Release BootSel early to delay startup on version 4.0.0 onwards
+
+    Returns:
+        None
+    """
+
+    if direct:
+        #setup GPIO
+        GPIO.setmode(GPIO.BOARD)
+        GPIO.setwarnings(False)
+
+        #boot_sel = 8
+        #rst_n = 10
+        '''
+           Mycroft board update
+        '''
+        #GPIO.setmode(GPIO.BCM)
+
+        boot_sel = 37 #26 #= 25 # fix these numbers to be Wiring Pi
+        rst_n    = 13 #27 #= 2  
+        GPIO.setup(boot_sel, GPIO.IN) # Normally, the Pi should not drive this
+        GPIO.setup(rst_n, GPIO.OUT, initial=GPIO.HIGH)
+
+    #setup SPI
+    spi = spidev.SpiDev()
+    bus_spi = 0
+    device = 0
+    spi.open(bus_spi, device)
+
+    #SPI Settings
+    spi.max_speed_hz = int(max_spi_speed_mhz * 1000000)
+    spi.mode = 0b00 #XMOS supports 00 or 11
+
+    spi_block_size = 4096 #Limitation in spidev and xfer2 doesn't work!
+
+    if direct:
+        GPIO.output(rst_n, 0)
+        GPIO.setup(boot_sel, GPIO.OUT, initial=GPIO.HIGH)
+        GPIO.output(rst_n, 1)
+    else:
+        set_boot_sel()
+
+    # Create a table to map byte values to their bit-reversed values
+    reverse_table  = [bit_reversed_byte(byte) for byte in range(256)]
+
+    data = []
+    with open(bin_filename, "rb") as f:
+        bytes_read = f.read()
+        data = list(bytes_read)
+        binary_size = len(data)
+        block_count = 0
+        print('Read file "{0}" size: {1} Bytes'.format(args.bin_filename, binary_size))
+        if binary_size % spi_block_size != 0:
+            print("Warning - binary file not a multiple of {} - {} remainder".format( \
+                  spi_block_size, binary_size % spi_block_size))
+        while binary_size > 0:
+            block = [reverse_table[byte] for byte in data[:spi_block_size]]
+            del data[:spi_block_size]
+            binary_size = len(data)
+            if verbose:
+                print("Sending {} Bytes in block {} checksum 0x{:X}".format( \
+                      len(block), block_count, sum(block)))
+            spi.xfer(block)
+
+            if block_count == 0:
+                #Long delay for PLL reboot
+                time.sleep(0.1)
+
+                if delay:
+                    # release boot_sel early to prevent startup
+                    if direct:
+                        GPIO.setup(boot_sel, GPIO.IN)
+                    else:
+                        #bus = smbus.SMBus(1)
+                        bus = SMBus(1)
+                        data_to_write = 0xFE
+                        bus.write_byte_data(0x20, 3, data_to_write)
+                        data_to_write = 0xFF
+                        bus.write_byte_data(0x20, 7, data_to_write)
+
+            elif binary_size > 0:
+                time.sleep(block_transfer_pause_ms / 1000)
+            block_count += 1
+    print("Sending complete")
+
+    if direct:
+        GPIO.setup(boot_sel, GPIO.IN) # Once booted, the Pi should not need to drive boot_sel
+        GPIO.setup(rst_n, GPIO.OUT, initial=GPIO.HIGH) # Once booted, the Pi should not need to drive reset
+        #GPIO.cleanup()
+    else:
+        #bus = smbus.SMBus(1)
+        bus = SMBus(1)
+
+        # reset BOOT_SEL
+        data_to_write = 0xFE
+        bus.write_byte_data(0x20, 3, data_to_write)
+        data_to_write = 0xFF
+        bus.write_byte_data(0x20, 7, data_to_write)
+
+
+
+
+if __name__ == "__main__":
+    start_time = time.time()
+    parser = argparse.ArgumentParser(description='Load an image via SPI slave from an RPi')
+    parser.add_argument('bin_filename', help='binary file name')
+    parser.add_argument('--direct', action='store_true', \
+                        help='Use just direct GPIO outputs rather than using the XVF3510 Development Kit Pi HAT')
+    parser.add_argument('--delay', action='store_true', \
+                        help='Delay xvf3510 device start. Release the BootSel pin early to prevent the XVF3510 (V4.0.0 onwards) from starting with the default I2S configuration. This gives AP a chance to configure and start the XVF3510 device.')
+    parser.add_argument('--max-spi-speed-mhz', type=float, default=5, \
+                        help='Max SPI speed in MHz')
+    parser.add_argument('--block-transfer-pause-ms', type=float, default=1, \
+                        help='pause between SPI transfers in milliseconds, default 1ms')
+    parser.add_argument('--verbose', action='store_true', \
+                        help='print debug information')
+
+    args = parser.parse_args()
+
+    if not Path(args.bin_filename).is_file():
+        print("Error: input file {} not found".format(args.bin_filename))
+        exit(1)
+
+    send_image(args.bin_filename, args.verbose, args.max_spi_speed_mhz, args.block_transfer_pause_ms, args.direct, args.delay)
+
+    end_time = time.time()
+    if args.verbose:
+        print("Sending image took {:.3} seconds".format(end_time - start_time))
diff --git a/buildroot-external/rootfs-overlay/etc/asound.conf b/buildroot-external/rootfs-overlay/etc/asound.conf
deleted file mode 100644
index 23e1f11e..00000000
--- a/buildroot-external/rootfs-overlay/etc/asound.conf
+++ /dev/null
@@ -1,14 +0,0 @@
-# Use PulseAudio by default
-pcm.!default {
-  type pulse
-  fallback "sysdefault"
-  hint {
-    show on
-    description "Default ALSA Output (currently PulseAudio Sound Server)"
-  }
-}
-
-ctl.!default {
-  type pulse
-  fallback "sysdefault"
-}
diff --git a/buildroot-external/rootfs-overlay/etc/pulse/mycroft-sj201-daemon.conf b/buildroot-external/rootfs-overlay/etc/pulse/mycroft-sj201-daemon.conf
index 2b50a60c..6972d49a 100644
--- a/buildroot-external/rootfs-overlay/etc/pulse/mycroft-sj201-daemon.conf
+++ b/buildroot-external/rootfs-overlay/etc/pulse/mycroft-sj201-daemon.conf
@@ -92,8 +92,4 @@
 resample-method = ffmpeg
 default-sample-format = s32le
 default-sample-rate = 48000
-alternate-sample-rate = 44100
-default-sample-channels = 2
-default-channel-map = front-left,front-right
-avoid-resampling = true
 flat-volumes = no
diff --git a/buildroot-external/rootfs-overlay/etc/pulse/mycroft-sj201-default.pa b/buildroot-external/rootfs-overlay/etc/pulse/mycroft-sj201-default.pa
deleted file mode 100644
index 326fe0a9..00000000
--- a/buildroot-external/rootfs-overlay/etc/pulse/mycroft-sj201-default.pa
+++ /dev/null
@@ -1,77 +0,0 @@
-#!/usr/bin/pulseaudio -nF
-#
-# This file is part of PulseAudio.
-#
-# PulseAudio is free software; you can redistribute it and/or modify it
-# under the terms of the GNU Lesser General Public License as published by
-# the Free Software Foundation; either version 2 of the License, or
-# (at your option) any later version.
-#
-# PulseAudio is distributed in the hope that it will be useful, but
-# WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
-# General Public License for more details.
-#
-# You should have received a copy of the GNU Lesser General Public License
-# along with PulseAudio; if not, see <http://www.gnu.org/licenses/>.
-
-# This startup script is used only if PulseAudio is started in system
-# mode.
-
-### Automatically restore the volume of streams and devices
-load-module module-device-restore
-load-module module-stream-restore
-load-module module-card-restore
-
-### Automatically load driver modules depending on the hardware available
-.ifexists module-udev-detect.so
-load-module module-udev-detect tsched=0
-.else
-### Use the static hardware detection module (for systems that lack udev/hal support)
-load-module module-detect
-.endif
-
-### Load several protocols
-.ifexists module-esound-protocol-unix.so
-load-module module-esound-protocol-unix
-.endif
-load-module module-native-protocol-unix auth-anonymous=1
-
-### Network access (may be configured with paprefs, so leave this commented
-### here if you plan to use paprefs)
-#load-module module-esound-protocol-tcp
-load-module module-native-protocol-tcp auth-ip-acl=127.0.0.1;192.168.0.0/16;172.16.0.0/12;10.0.0.0/8 auth-anonymous=1
-load-module module-zeroconf-publish
-
-### Automatically restore the default sink/source when changed by the user
-### during runtime
-### NOTE: This should be loaded as early as possible so that subsequent modules
-### that look up the default sink/source get the right value
-load-module module-default-device-restore
-
-### Automatically move streams to the default sink if the sink they are
-### connected to dies, similar for sources
-load-module module-rescue-streams
-
-### Make sure we always have a sink around, even if it is a null sink.
-load-module module-always-sink
-
-### Automatically suspend sinks/sources that become idle for too long
-load-module module-suspend-on-idle
-
-### Enable positioned event sounds
-load-module module-position-event-sounds
-
-### OpenVoiceOS Audio Settings
-unload-module module-suspend-on-idle
-load-module module-role-ducking
-load-module module-combine-sink sink_name=OpenVoiceOS
-load-module module-remap-source source_name=VF_ASR_L source_properties="device.description='VocalFusion ASR recording'" master=alsa_input.platform-asoc-simple-card.0.stereo-fallback remix=no master_channel_map=front-left channel_map=mono
-load-module module-remap-source source_name=VF_Comms_R source_properties="device.description='VocalFusion Comms recording'" master=alsa_input.platform-asoc-simple-card.0.stereo-fallback remix=no master_channel_map=front-right channel_map=mono
-set-default-source VF_ASR_L
-set-default-sink OpenVoiceOS
-
-### Enable Echo/Noise-Cancellation
-#load-module module-echo-cancel aec_method=webrtc source_name=echoCancel_source sink_name=echoCancel_sink
-#set-default-source echoCancel_source
-#set-default-sink echoCancel_sink
diff --git a/buildroot-external/rootfs-overlay/etc/pulse/pulseaudio-daemon.conf b/buildroot-external/rootfs-overlay/etc/pulse/pulseaudio-daemon.conf
index 00773376..9752e35e 100644
--- a/buildroot-external/rootfs-overlay/etc/pulse/pulseaudio-daemon.conf
+++ b/buildroot-external/rootfs-overlay/etc/pulse/pulseaudio-daemon.conf
@@ -93,5 +93,4 @@ resample-method = ffmpeg
 default-sample-format = s16le
 default-sample-rate = 44100
 alternate-sample-rate = 48000
-; avoid-resampling = true
 flat-volumes = no
diff --git a/buildroot-external/rootfs-overlay/usr/bin/tas5806-init b/buildroot-external/rootfs-overlay/usr/bin/tas5806-init
index a73c7916..1b6fd4de 100755
--- a/buildroot-external/rootfs-overlay/usr/bin/tas5806-init
+++ b/buildroot-external/rootfs-overlay/usr/bin/tas5806-init
@@ -181,7 +181,7 @@ class tasTest:
 
         return x * p1 + x0        
         
-    def setVolume(self, vol=1.0):
+    def setVolume(self, vol=0.5):
         # vol takes a float from 0.0 - 1.0
         # default vol 0.5 = 50%
         hw_vol = self.calc_log_y(vol * 100.0)
diff --git a/buildroot-external/rootfs-overlay/usr/libexec/ovos-i2csound b/buildroot-external/rootfs-overlay/usr/libexec/ovos-i2csound
index 5ef51851..f65a58e2 100755
--- a/buildroot-external/rootfs-overlay/usr/libexec/ovos-i2csound
+++ b/buildroot-external/rootfs-overlay/usr/libexec/ovos-i2csound
@@ -16,13 +16,9 @@
 ##########################################################################
 
 # Set default configurations
-ASOUND_STATE=/var/lib/alsa/default-asound.state
 PULSE_SYSTEM=/etc/pulse/pulseaudio-system.pa
 PULSE_DAEMON=/etc/pulse/pulseaudio-daemon.conf
 
-# Set known hat overlay variables
-RPI_HATS="seeed-2mic-voicecard seeed-4mic-voicecard seeed-8mic-voicecard"
-
 # Scanning the I2C bus for know addresses 
 is_1a=$(i2cdetect -y 1 0x1a 0x1a | egrep "(1a|UU)" | awk '{print $2}') # ReSpeaker 2-mic / WM8960
 if [ "${is_1a}" == "1a" ] || [ "${is_1a}" == "UU" ] ; then
@@ -62,12 +58,6 @@ fi
 
 
 # Remove old configurations
-if [ -f /var/lib/alsa/asound.state ] ; then
-    rm /var/lib/alsa/asound.state
-fi
-if [ -f /etc/ovos_asound.state ] ; then
-    rm /etc/ovos_asound.state
-fi
 if [ -f /etc/pulse/system.pa ] ; then
     rm /etc/pulse/system.pa
 fi
@@ -77,27 +67,19 @@ fi
 
 if [ "$RESPEAKER2" == "found" ] && [ "$RESPEAKER4" != "found" ] ; then
     echo "Installing and configuring ReSpeaker 2-mic"
-    modprobe snd-soc-wm8960
-    OVERLAY=seeed-2mic-voicecard
-    ASOUND_STATE=/etc/voicecard/wm8960_asound.state
+    dtoverlay seeed-2mic-voicecard
 fi
 
 if [ "${RESPEAKER6}" == "found" ] && [ "${RESPEAKER4}" != "found" ] ; then
     echo "Installing and configuring ReSpeaker 4-mic"
-    modprobe snd-soc-seeed-voicecard
-    modprobe snd-soc-ac108
-    OVERLAY=seeed-4mic-voicecard
-    ASOUND_STATE=/etc/voicecard/ac108_asound.state
+    dtoverlay seeed-4mic-voicecard
     PULSE_SYSTEM=/etc/pulse/seeed-voicecard-4mic-default.pa
     PULSE_DAEMON=/etc/pulse/seeed-voicecard-4mic-daemon.conf
 fi
 
 if [ "{$RESPEAKER6}" == "found" ] && [ "${RESPEAKER4}" == "found" ] ; then
     echo "Installing and configuring ReSpeaker 6mic"
-    modprobe snd-soc-seeed-voicecard
-    modprobe snd-soc-ac108
-    OVERLAY=seeed-8mic-voicecard
-    ASOUND_STATE=/etc/voicecard/ac108_6mic.state
+    dtoverlay seeed-8mic-voicecard
     PULSE_SYSTEM=/etc/pulse/seeed-voicecard-8mic-default.pa
     PULSE_DAEMON=/etc/pulse/seeed-voicecard-8mic-daemon.conf
 fi
@@ -110,7 +92,8 @@ fi
 if [ "$TAS5806" ] && [ "$SJ201LED" ]; then
     echo "Installing and configuring SJ201"
     # Initializing XMOS xvf3510
-    /usr/sbin/xvf3510-start
+    dtoverlay xvf3510
+    xvf3510-flash --direct "/usr/lib/firmware/xvf3510/app_xvf3510_int_spi_boot_v4_1_0.bin"
     # Initializing Texas Instruments 5806 Amplifier
     /usr/bin/tas5806-init
     # Initializing and resetting LED ring
@@ -118,27 +101,11 @@ if [ "$TAS5806" ] && [ "$SJ201LED" ]; then
     # Reset FAN to low speed
     /usr/sbin/i2cset -a -y 1 0x04 101 30 i
 
-    #PULSE_SYSTEM=/etc/pulse/mycroft-sj201-default.pa
-    #PULSE_DAEMON=/etc/pulse/mycroft-sj201-daemon.conf
+    PULSE_DAEMON=/etc/pulse/mycroft-sj201-daemon.conf
 fi
 
-# Load overlay
-if [ "$OVERLAY" ]; then
-    echo Loading $OVERLAY ...
-
-    # Make sure the driver loads correctly
-    dtoverlay $OVERLAY || true
-fi
-
-# Install soundstate
-echo "create asound status file"
-ln -s $ASOUND_STATE /etc/ovos_asound.state
-
 # Install pulseaudio files
 echo "create pulse system file"
 ln -s $PULSE_SYSTEM /etc/pulse/system.pa
 echo "create pulse daemon file"
 ln -s $PULSE_DAEMON /etc/pulse/daemon.conf
-
-# Restore sound levels
-alsactl -E HOME=/run/alsa -f /etc/ovos_asound.state restore