diff --git a/overlay/opt/emcomm-tools/bin/et-audio b/overlay/opt/emcomm-tools/bin/et-audio
index 4aa9062..4008962 100755
--- a/overlay/opt/emcomm-tools/bin/et-audio
+++ b/overlay/opt/emcomm-tools/bin/et-audio
@@ -2,7 +2,7 @@
 #
 # Author  : Gaston Gonzalez
 # Date    : 31 October 2024
-# Updated : 5 October 2025
+# Updated : 13 October 2025
 # Purpose : Configures ET audio device with sane defaults
 #
 # Preconditions
@@ -10,6 +10,7 @@
 #
 # Postconditions
 # 1. ALSA settings set on ET audio device
+. /opt/emcomm-tools/bin/et-common
 
 usage() {
   echo "usage: $(basename $0) <command>"
@@ -48,10 +49,27 @@ update-config () {
 
        et-log "Updating audio device: '${ET_DEVICE_NAME}' (${FULL_AUDIO_DEVICE})' for ALSA PnP configuration."
 
+       # Handle audio settings specifically if defined in the radio configuration
+       AUDIO_INIT_SCRIPT=$(jq -r -e '.audio.script' ${ET_ACTIVE_RADIO_CONF})
+       if [[ $? -eq 0 ]]; then
+         et-log "Executing audio configuration script: ${AUDIO_INIT_SCRIPT}"
+
+         CMD="${AUDIO_INIT_SCRIPT} ${AUDIO_CARD} ${AUDIO_DEVICE}"
+         et-log "Running command: ${CMD}"
+         ${CMD}
+
+         if [[ $? -ne 0 ]]; then
+           et-log "Audio init script ${AUDIO_INIT_SCRIPT} failed. Can't start application."
+           notify-user "Audio init script failed. Can't start application."
+           exit 1
+         fi
+	 
+         exit 0
+       fi
+
+       # Handle audio generically for most sound card interfaces
        case ${ET_DEVICE_NAME} in
          "DIGIRIG_MOBILE")
-	   # TODO: 92% is needed for the TX-500MP. Revisit approach for setting speaker
-	   #       out differently across radios definitions.
            # Unmute Speaker a set volume. Adjust if remote station can't decode you. Your TX controls.
            amixer -q -c ${AUDIO_CARD} sset Speaker Playback Switch 42% unmute
            # Unmute Mic
@@ -99,31 +117,6 @@ update-config () {
 
            et-log "Applied amixer settings for ${ET_DEVICE_NAME}"
          ;;
-         "FX-4CR")
-           # Unmute the PCM and set the volume to 21% to get the full output power. This value is
-           # dependent on the settings defined for the FX-4CR in the et-radio notes. 
-	   amixer -q -c ${AUDIO_CARD} sset 'PCM' 31% unmute
-
-           # Set "L/R Capture" to 55%. Adjust if you can't decode received audio.
-	   amixer -q -c ${AUDIO_CARD} sset 'Mic' 67% unmute
-
-           # Disable Auto Gain Control
-           amixer -q -c ${AUDIO_CARD} sset 'Auto Gain Control' mute
-
-           et-log "Applied amixer settings for ${ET_DEVICE_NAME}"
-	   ;;
-         "X6100")
-           # Unmute Speaker a set volume. Adjust if remote station can't decode you.
-           amixer -q -c ${AUDIO_CARD} sset Speaker Playback Switch 42% unmute
-           # Unmute Mic
-           amixer -q -c ${AUDIO_CARD} sset Mic Playback Switch 52% unmute
-           # Set "L/R Capture" to 19. Adjust if you can't decode received audio. 
-           amixer -q -c ${AUDIO_CARD} sset Mic Capture Switch 31% unmute
-           # Disable Auto Gain Control
-           amixer -q -c ${AUDIO_CARD} sset 'Auto Gain Control' mute
-
-           et-log "Applied amixer settings for ${ET_DEVICE_NAME}"
-         ;;
          *)
            et-log "No ALSA configuration specified for this ET_DEVICE."
          ;;
diff --git a/overlay/opt/emcomm-tools/bin/et-radio b/overlay/opt/emcomm-tools/bin/et-radio
index e049fcf..54c4e8e 100755
--- a/overlay/opt/emcomm-tools/bin/et-radio
+++ b/overlay/opt/emcomm-tools/bin/et-radio
@@ -2,7 +2,7 @@
 #
 # Author   : Gaston Gonzalez
 # Date     : 11 October 2024
-# Updated  : 16 March 2025
+# Updated  : 13 March 2025
 # Purpose  : A script for managaing plug-and-play radios
 source /opt/emcomm-tools/bin/et-common
 
@@ -18,7 +18,7 @@ while IFS= read -r radio; do
     MODEL=$(cat $radio | jq -r .model)
 
     options+=("$ID" "$VENDOR $MODEL")
-done < <(find $ET_HOME/conf/radios.d -type f | grep -v "bt.json" | sort)
+done < <(find $ET_HOME/conf/radios.d -type f -name \*.json | grep -v "bt.json" | sort)
 
 SELECTED_RADIO=$(dialog --clear --menu "Select a radio:" 21 60 10 "${options[@]}" 3>&1 1>&2 2>&3)
 exit_status=$?
diff --git a/overlay/opt/emcomm-tools/bin/et-yaac b/overlay/opt/emcomm-tools/bin/et-yaac
index 02b4a68..d9c7c31 100755
--- a/overlay/opt/emcomm-tools/bin/et-yaac
+++ b/overlay/opt/emcomm-tools/bin/et-yaac
@@ -2,7 +2,7 @@
 #
 # Author  : Gaston Gonzalez
 # Date    : 3 November 2024
-# Updated : 16 March 2025
+# Updated : 13 October 2025
 # Purpose : Wrapper script for starting YAAC with PnP support
 #
 # Preconditions:
@@ -40,7 +40,7 @@ start() {
   update-config
   
   if [[ $? -eq 0 ]]; then
-    CMD="java -jar /opt/yaac/YAAC.jar"
+    CMD="java -Xms2g -Xmx6g -XX:+UseG1GC -jar /opt/yaac/YAAC.jar"
 
     PS_OUT=$(ps -ef | grep "[r]fcomm0")
     if [[ $? -eq 0 ]]; then
diff --git a/overlay/opt/emcomm-tools/conf/radios.d/audio/bg2fx-fx4cr.sh b/overlay/opt/emcomm-tools/conf/radios.d/audio/bg2fx-fx4cr.sh
new file mode 100755
index 0000000..458e611
--- /dev/null
+++ b/overlay/opt/emcomm-tools/conf/radios.d/audio/bg2fx-fx4cr.sh
@@ -0,0 +1,35 @@
+#!/bin/bash
+#
+# Author  : Gaston Gonzalez
+# Date    : 13 October 2025
+# Purpose : Audio settings specific to the FX-4CR
+#
+# Preconditions
+# 1. Supported audio interface is connected and properly detected
+#
+# Postconditions
+# 1. ALSA settings set on ET audio device
+
+usage() {
+  echo "usage: $(basename $0) <ET audio card> <ET device name>"
+}
+
+if [[ $# -ne 2 ]]; then
+  usage
+  exit 1
+fi
+
+AUDIO_CARD=$1
+ET_DEVICE_NAME=$2
+
+# Unmute the PCM and set the volume to 21% to get the full output power. This value is
+# dependent on the settings defined for the FX-4CR in the et-radio notes. 
+amixer -q -c ${AUDIO_CARD} sset 'PCM' 31% unmute
+
+# Set "L/R Capture" to 55%. Adjust if you can't decode received audio.
+amixer -q -c ${AUDIO_CARD} sset 'Mic' 67% unmute
+
+# Disable Auto Gain Control
+amixer -q -c ${AUDIO_CARD} sset 'Auto Gain Control' mute
+
+et-log "Applied amixer settings for audio card ${AUDIO_CARD} on device ${ET_DEVICE_NAME}"
diff --git a/overlay/opt/emcomm-tools/conf/radios.d/audio/lab599-tx500mp.sh b/overlay/opt/emcomm-tools/conf/radios.d/audio/lab599-tx500mp.sh
new file mode 100755
index 0000000..93c7dbf
--- /dev/null
+++ b/overlay/opt/emcomm-tools/conf/radios.d/audio/lab599-tx500mp.sh
@@ -0,0 +1,38 @@
+#!/bin/bash
+#
+# Author  : Gaston Gonzalez
+# Date    : 9 October 2025
+# Purpose : Audio settings specific to the Lab599 TX-500MP
+#
+# Preconditions
+# 1. Supported audio interface is connected and properly detected
+#
+# Postconditions
+# 1. ALSA settings set on ET audio device
+
+usage() {
+  echo "usage: $(basename $0) <ET audio card> <ET device name>"
+}
+
+if [[ $# -ne 2 ]]; then
+  usage
+  exit 1
+fi
+
+AUDIO_CARD=$1
+ET_DEVICE_NAME=$2
+
+# Unmute Speaker and set the volume to 81. Adjust if the remote station
+# can't decode you or if there is no output power on TX.
+amixer -q -c ${AUDIO_CARD} sset Speaker Playback Switch 92% unmute
+
+# Unmute Mic
+amixer -q -c ${AUDIO_CARD} sset Mic Playback Switch 52% unmute
+
+# Set "L/R Capture" to 19. Adjust if you can't decode received audio.
+amixer -q -c ${AUDIO_CARD} sset Mic Capture Switch 31% unmute
+
+# Disable Auto Gain Control
+amixer -q -c ${AUDIO_CARD} sset 'Auto Gain Control' mute
+
+et-log "Applied amixer settings for audio card ${AUDIO_CARD} on device ${ET_DEVICE_NAME}"
diff --git a/overlay/opt/emcomm-tools/conf/radios.d/audio/xiegu-x6100.sh b/overlay/opt/emcomm-tools/conf/radios.d/audio/xiegu-x6100.sh
new file mode 100755
index 0000000..4829db5
--- /dev/null
+++ b/overlay/opt/emcomm-tools/conf/radios.d/audio/xiegu-x6100.sh
@@ -0,0 +1,38 @@
+#!/bin/bash
+#
+# Author  : Gaston Gonzalez
+# Date    : 13 October 2025
+# Purpose : Audio settings specific to the Xiegu X6100
+#
+# Preconditions
+# 1. Supported audio interface is connected and properly detected
+#
+# Postconditions
+# 1. ALSA settings set on ET audio device
+
+usage() {
+  echo "usage: $(basename $0) <ET audio card> <ET device name>"
+}
+
+if [[ $# -ne 2 ]]; then
+  usage
+  exit 1
+fi
+
+AUDIO_CARD=$1
+ET_DEVICE_NAME=$2
+
+# Unmute Speaker and set the volume to 27. Adjust if the remote station
+# can't decode you or if there is no output power on TX.
+amixer -q -c ${AUDIO_CARD} sset Speaker Playback Switch 42% unmute
+
+# Unmute Mic
+amixer -q -c ${AUDIO_CARD} sset Mic Playback Switch 52% unmute
+
+# Set "L/R Capture" to 19. Adjust if you can't decode received audio.
+amixer -q -c ${AUDIO_CARD} sset Mic Capture Switch 31% unmute
+
+# Disable Auto Gain Control
+amixer -q -c ${AUDIO_CARD} sset 'Auto Gain Control' mute
+
+et-log "Applied amixer settings for audio card ${AUDIO_CARD} on device ${ET_DEVICE_NAME}"
diff --git a/overlay/opt/emcomm-tools/conf/radios.d/audio/yaesu-ft857d.sh b/overlay/opt/emcomm-tools/conf/radios.d/audio/yaesu-ft857d.sh
new file mode 100755
index 0000000..847b2bf
--- /dev/null
+++ b/overlay/opt/emcomm-tools/conf/radios.d/audio/yaesu-ft857d.sh
@@ -0,0 +1,37 @@
+#!/bin/bash
+#
+# Author  : Gaston Gonzalez
+# Date    : 14 October 2025
+# Purpose : Audio settings specific to the Yaesu FT-857D via DigiRig Mobile
+#
+# Preconditions
+# 1. Supported audio interface is connected and properly detected
+#
+# Postconditions
+# 1. ALSA settings set on ET audio device
+
+usage() {
+  echo "usage: $(basename $0) <ET audio card> <ET device name>"
+}
+
+if [[ $# -ne 2 ]]; then
+  usage
+  exit 1
+fi
+
+AUDIO_CARD=$1
+ET_DEVICE_NAME=$2
+
+# Unmute Speaker a set volume. Adjust if remote station can't decode you. Your TX controls.
+amixer -q -c ${AUDIO_CARD} sset Speaker Playback Switch 42% unmute
+
+# Unmute Mic
+amixer -q -c ${AUDIO_CARD} sset Mic Playback Switch 52% unmute
+
+# Set "L/R Capture" to 19. Adjust if you can't decode received audio. Your RX controls.
+amixer -q -c ${AUDIO_CARD} sset Mic Capture Switch 25% unmute
+
+# Disable Auto Gain Control
+amixer -q -c ${AUDIO_CARD} sset 'Auto Gain Control' mute
+
+et-log "Applied amixer settings for audio card ${AUDIO_CARD} on device ${ET_DEVICE_NAME}"
diff --git a/overlay/opt/emcomm-tools/conf/radios.d/bg2fx-fx4cr.json b/overlay/opt/emcomm-tools/conf/radios.d/bg2fx-fx4cr.json
index 6c39035..cc4c407 100644
--- a/overlay/opt/emcomm-tools/conf/radios.d/bg2fx-fx4cr.json
+++ b/overlay/opt/emcomm-tools/conf/radios.d/bg2fx-fx4cr.json
@@ -9,6 +9,9 @@
     "conf": "data_bits=8,serial_handshake=None,stop_bits=1,rts_state=OFF",
     "pttOnly": "false"
   },
+  "audio": {
+    "script": "/opt/emcomm-tools/conf/radios.d/audio/bg2fx-fx4cr.sh"
+  },
   "notes": [
     "Short press [PWR], then rotate AF knob until POW = 5.0",
     "Toggle [SSB] button until both USB and DIG appear",
diff --git a/overlay/opt/emcomm-tools/conf/radios.d/lab599-tx500mp.json b/overlay/opt/emcomm-tools/conf/radios.d/lab599-tx500mp.json
index 63331ac..773d60e 100644
--- a/overlay/opt/emcomm-tools/conf/radios.d/lab599-tx500mp.json
+++ b/overlay/opt/emcomm-tools/conf/radios.d/lab599-tx500mp.json
@@ -8,6 +8,9 @@
     "ptt": "RTS",
     "pttOnly": "false"
   },
+  "audio": {
+    "script": "/opt/emcomm-tools/conf/radios.d/audio/lab599-tx500mp.sh"
+  },
   "notes": [
     "1. Set MENU 36 CAT PROTOCOL = TS2000",
     "2. Set MODE = DIGI",
diff --git a/overlay/opt/emcomm-tools/conf/radios.d/xiegu-x6100.json b/overlay/opt/emcomm-tools/conf/radios.d/xiegu-x6100.json
index 2550b68..3e71fa6 100644
--- a/overlay/opt/emcomm-tools/conf/radios.d/xiegu-x6100.json
+++ b/overlay/opt/emcomm-tools/conf/radios.d/xiegu-x6100.json
@@ -9,6 +9,9 @@
     "conf": "timeout=1000,retry=1,timeout_retry=1",
     "primeRig": true
   },
+  "audio": {
+    "script": "/opt/emcomm-tools/conf/radios.d/audio/xiegu-x6100.sh"
+  },
   "notes": [
     "Turn on radio",
     "Plug USB-C cable into the DEV port",
diff --git a/overlay/opt/emcomm-tools/conf/radios.d/yaesu-ft857d.json b/overlay/opt/emcomm-tools/conf/radios.d/yaesu-ft857d.json
index f52d8fc..e0036db 100644
--- a/overlay/opt/emcomm-tools/conf/radios.d/yaesu-ft857d.json
+++ b/overlay/opt/emcomm-tools/conf/radios.d/yaesu-ft857d.json
@@ -7,6 +7,9 @@
     "baud": "38400",
     "ptt": "RTS"
   },
+  "audio": {
+    "script": "/opt/emcomm-tools/conf/radios.d/audio/yaesu-ft857d.sh"
+  },
   "notes": [
     "Menu 019 CAT RATE = 38400",
     "Menu 020 CAT = CAT",
diff --git a/scripts/install-emcomm-tools.sh b/scripts/install-emcomm-tools.sh
index 186544a..745ce6a 100755
--- a/scripts/install-emcomm-tools.sh
+++ b/scripts/install-emcomm-tools.sh
@@ -2,7 +2,7 @@
 #
 # Author  : Gaston Gonzalez
 # Date    : 6 October 2024
-# Updated : 1 November 2024
+# Updated : 9 October 2025
 # Purpose : Install EmComm Tools applications
 
 et-log "Installing EmComm Tools applications..."
@@ -18,6 +18,10 @@ chgrp -v -R $ET_GROUP $ET_HOME/conf/radios.d
 chmod -v 775 $ET_HOME/conf/radios.d
 chmod -v 664 $ET_HOME/conf/radios.d/*.json
 
+chgrp -v -R $ET_GROUP $ET_HOME/conf/radios.d/audio
+chmod -v 775 $ET_HOME/conf/radios.d/audio
+chmod -v 664 $ET_HOME/conf/radios.d/audio/*.sh
+
 chgrp -v -R $ET_GROUP $ET_HOME/conf/template.d/packet
 chmod -v 775 $ET_HOME/conf/template.d/packet
 chmod -v 664 $ET_HOME/conf/template.d/packet/*.conf
diff --git a/scripts/install-hamlib.sh b/scripts/install-hamlib.sh
index 174745f..3a22533 100755
--- a/scripts/install-hamlib.sh
+++ b/scripts/install-hamlib.sh
@@ -2,7 +2,7 @@
 #
 # Author  : Gaston Gonzalez
 # Date    : 25 November 2022
-# Updated : 6 October 2025
+# Updated : 13 October 2025
 # Purpose : Install hamlib for rig control (rigctld)
 set -e
 trap 'last_command=$current_command; current_command=$BASH_COMMAND' DEBUG
@@ -12,7 +12,11 @@ trap 'et-log "\"${last_command}\" command failed with exit code $?."' ERR
 . ../overlay/opt/emcomm-tools/bin/et-common
 
 APP="hamlib"
-VERSION=4.6.5
+# The latest verion of Hamlib 4.6.5 has a problem with initial client
+# connections that can lead to rig control timeouts in applications like 
+# JS8Call. Rolling back to version 4.5 which was stable.
+#VERSION=4.6.5
+VERSION=4.5
 APP_AND_VERSION="${APP}-${VERSION}"
 INSTALL_DIR="/opt/${APP_AND_VERSION}"
 LINK_PATH="/opt/${APP}"