Merge pull request #55 from thetechprepper/feature/fldigi

Merge updated feature/fldigi branch to R5. Initial attempt at full plug-and-play support.

overlay/etc/skel/.config/JS8Call.ini

@@ -17,7 +17,7 @@ Miles=true
 MyCall=N0CALL
 MyGrid=DM33
 MyGroups=@@TTP,@@TTPNET
-MyInfo=ETC R3
+MyInfo=ETC R5
 Polling=1
 PSKReporter=false
 PTTMethod=@Variant(\0\0\0\x7f\0\0\0\x1eTransceiverFactory::PTTMethod\0\0\0\0\xfPTT_method_CAT\0)

overlay/opt/emcomm-tools/bin/et-fldigi

@@ -0,0 +1,201 @@
+#!/bin/bash
+#
+# Author  : Gaston Gonzalez
+# Date    : 2 October 2025
+# Purpose : Wrapper script for starting fldigi with PnP support
+#
+# Preconditions
+# 1. Supported radio and audio interface are connected and properly detected
+#
+# Postconditions
+# 1. Stop all running EmComm Tools modes
+# 2. fldigi core settings updated (e.g., CAT, audio, user config and ETC defaults)
+# 3. fldigi started
+
+usage() {
+  echo "usage: $(basename $0) <command>"
+  echo "  start           - Update config and start fldigi"
+  echo "  update-config   - Update config"
+}
+
+if [[ $# -ne 1 ]]; then
+  usage
+  exit 1
+fi
+
+notify_user() {
+  notify-send \
+   -t 5000 \
+   --app-name="EmComm Tools" \
+   "$1"
+}
+
+start() {
+  /opt/emcomm-tools/bin/et-kill-all && update-config && /usr/local/bin/fldigi &
+}
+
+update-config () {
+
+    # 1. Check if the audio device symlink was created by the udev rules
+    if [[ -e /dev/et-audio ]]; then
+
+       # 2. Check that this device was properly tagged with the ET_AUDIO env variable 
+       APLAY_OUT=$(arecord -l | grep ET_AUDIO)
+       if [[ $? -eq 0 ]]; then
+
+         ## Configure ALSA settings for sound card
+         /opt/emcomm-tools/bin/et-audio update-config
+
+       else
+         et-log "No ET_AUDIO device detected."
+         notify_user "Can't start fldigi. No ET_AUDIO device detected."
+         exit 1
+       fi
+    else
+      et-log "No ET_AUDIO device plugged in."
+      notify_user "Can't start fldigi. No supported audio device plugged in."
+      exit 1
+    fi
+
+    PORT_AUDIO_CONF=/tmp/conf.tmp
+    GEO_CONF=/tmp/geo.tmp
+    FLDIGI_CONF_DIR="${HOME}/.fldigi"
+    FLDIGI_CONF_FILE="${FLDIGI_CONF_DIR}/fldigi_def.xml"
+
+    if [[ ! -e ${FLDIGI_CONF_DIR} ]]; then
+      et-log "${FLDIGI_CONF_DIR} does not exist. Creating it from template."
+      mkdir -v ${FLDIGI_CONF_DIR}
+      cp -v /etc/skel/.fldigi/fldigi_def.xml ${FLDIGI_CONF_DIR}
+    fi
+
+    [ -z "$ET_USER_CONFIG" ] && ET_USER_CONFIG="${HOME}/.config/emcomm-tools/user.json"
+
+    # clean up temporary config that may exist
+    [[ -e ${PORT_AUDIO_CONF} ]] && rm ${PORT_AUDIO_CONF}
+
+    et-portaudio 2>/dev/null > ${PORT_AUDIO_CONF}
+
+    if [[ $? -ne 0 ]]; then
+      echo "No supported ET_AUDIO device found"
+      exit 1
+    fi
+
+    DEVICE=$(jq -r -e '.device' ${PORT_AUDIO_CONF})
+    if [[ $? -ne 0 ]]; then
+      echo "Error getting PulseAudio device name for ET_AUDIO device"
+      exit 1
+    fi
+
+    INDEX=$(jq -r -e '.index' ${PORT_AUDIO_CONF})
+    if [[ $? -ne 0 ]]; then
+      echo "Error getting PulseAudio device index for ET_AUDIO device"
+      exit 1
+    fi
+
+    ##############################################
+    # Map ALSA ET_AUDIO device to PortAudio device
+    ##############################################
+    et-log "Updating PortAudio device configuration..."
+
+    sed -i "s|^<AUDIOIO>.*|<AUDIOIO>1</AUDIOIO>|" ${FLDIGI_CONF_FILE}
+
+    sed -i "s|^<PORTINDEVICE>.*|<PORTINDEVICE>${DEVICE}</PORTINDEVICE>|" ${FLDIGI_CONF_FILE}
+    sed -i "s|^<PORTININDEX>.*|<PORTININDEX>${INDEX}</PORTININDEX>|" ${FLDIGI_CONF_FILE}
+
+    sed -i "s|^<PORTOUTDEVICE>.*|<PORTOUTDEVICE>${DEVICE}</PORTOUTDEVICE>|" ${FLDIGI_CONF_FILE}
+    sed -i "s|^<PORTOUTINDEX>.*|<PORTOUTINDEX>${INDEX}</PORTOUTINDEX>|" ${FLDIGI_CONF_FILE}
+
+    et-log "Using device '${DEVICE}' and device index '${INDEX}' for PortAudio configuration"
+
+
+    #################
+    # Update callsign
+    #################
+    et-log "Updating callsign configuration..."
+    CALLSIGN=$(jq -r -e '.callsign' ${ET_USER_CONFIG})
+
+    if [[ "${CALLSIGN}" = "N0CALL" ]]; then
+       et-log "Exiting early. No callsign set. Run: et-user."
+       exit 1
+    fi
+
+    et-log "Using callsign '${CALLSIGN}'"
+    sed -i "s|^<MYCALL>.*|<MYCALL>${CALLSIGN}</MYCALL>|" ${FLDIGI_CONF_FILE}
+
+
+    ###############################################
+    # Update grid based on ETC geolocation services
+    ###############################################
+    et-log "Updating your grid square..."
+    curl -f -s "http://localhost:1981/api/geo/position" > ${GEO_CONF}
+
+    if [[ $? -eq 0 ]]; then
+      GRID=$(jq -r -e '.position.gridSquare' ${GEO_CONF})
+      if [[ $? -eq 0 ]]; then
+        et-log "Using grid square '${GRID}' for your location"
+        sed -i "s|^<MYLOC>.*|<MYLOC>${GRID}</MYLOC>|" ${FLDIGI_CONF_FILE}
+      fi
+    fi
+
+    [[ -e ${GEO_CONF} ]] && rm ${GEO_CONF}
+
+
+    #####################################################################
+    # Configure CAT interface using Hamlib's rig control daemon (rigctld)
+    #####################################################################
+    et-log "Updating CAT control configuration..."
+
+    sed -i "s|^<CHKUSEHAMLIBIS>.*|<CHKUSEHAMLIBIS>1</CHKUSEHAMLIBIS>|" ${FLDIGI_CONF_FILE}
+    sed -i "s|^<HAMRIGMODEL>.*|<HAMRIGMODEL>2</HAMRIGMODEL>|" ${FLDIGI_CONF_FILE}
+    sed -i "s|^<HAMLIBCMDPTT>.*|<HAMLIBCMDPTT>1</HAMLIBCMDPTT>|" ${FLDIGI_CONF_FILE}
+    sed -i "s|^<HAMRIGDEVICE>.*|<HAMRIGDEVICE>localhost:4532</HAMRIGDEVICE>|" ${FLDIGI_CONF_FILE}
+
+
+    ######################################
+    # Enable Reed Soloman ID for RX and TX
+    ######################################
+    et-log "Enabling Reed Soloman ID for RX/TX..."
+
+    sed -i "s|^<RECEIVERSID>.*|<RECEIVERSID>1</RECEIVERSID>|" ${FLDIGI_CONF_FILE}
+    sed -i "s|^<TRANSMITRSID>.*|<TRANSMITRSID>1</TRANSMITRSID>|" ${FLDIGI_CONF_FILE}
+
+
+    ###########################
+    # Modem configuration: MT63
+    ###########################
+    et-log "Updating MT63 modem configuration..."
+
+    sed -i "s|^<MT63INTEGRATION>.*|<MT63INTEGRATION>1</MT63INTEGRATION>|" ${FLDIGI_CONF_FILE}
+
+
+    ########################
+    # Repeater configuration
+    ########################
+    et-log "Updating settings for linked repeater systems..."
+
+    # Key up for 2 seconds before transmitting tone. Needed for linked repeater systems.
+    sed -i "s|^<PRETONE>.*|<PRETONE>2</PRETONE>|" ${FLDIGI_CONF_FILE}
+
+
+    #####################
+    # NBEMS configuration
+    #####################
+    et-log "Updating settings for NBEMS..."
+
+    sed -i "s|^<OPEN_NBEMS_FOLDER>.*|<OPEN_NBEMS_FOLDER>1</OPEN_NBEMS_FOLDER>|" ${FLDIGI_CONF_FILE}
+    sed -i "s|^<FLMSG_PATHNAME>.*|<FLMSG_PATHNAME>/usr/local/bin/flmsg</FLMSG_PATHNAME>|" ${FLDIGI_CONF_FILE}
+}
+
+case $1 in
+  start)
+    start
+    ;;
+  update-config)
+    update-config
+    ;;
+  *)
+    echo "Invalid command."
+    usage
+    exit 1
+  ;;
+esac

overlay/opt/emcomm-tools/bin/et-kill-all

@@ -2,7 +2,7 @@
 #
 # Author   : Gaston Gonzalez
 # Date     : 12 November 2024
-# Updated  : 7 February 2025
+# Updated  : 2 October 2025
 # Purpose  : Stops all EmComm Tools sound-based services (i.e. modems) and
 #            amatuer radio applications to ensure a clean start for the next mode.
 
@@ -33,6 +33,10 @@ stop_all_services() {
   pkill et-vara
   pkill VARA 
 
+  # Stop fldigi
+  pkill fldigi
+  pkill et-fldigi
+
   stop_pat
 }
 

overlay/usr/share/glib-2.0/schemas/90_ubuntu-settings.gschema.override

@@ -12,7 +12,7 @@ show-desktop-icons = false
 picture-uri = 'file:///usr/share/backgrounds/emcomm-tools-wallpaper.png'
 
 [org.gnome.shell]
-favorite-apps = ['emcomm-tools.desktop', 'js8call.desktop', 'et-aircraft.desktop', 'org.gnome.Terminal.desktop', 'navit.desktop', 'min.desktop', 'org.gnome.Nautilus.desktop']
+favorite-apps = ['emcomm-tools.desktop', 'js8call.desktop', 'fldigi.desktop', 'et-aircraft.desktop', 'org.gnome.Terminal.desktop', 'navit.desktop', 'min.desktop', 'org.gnome.Nautilus.desktop']
 last-selected-power-profile = 'performance'
 
 [org.gnome.system.location]

scripts/install-et-portaudio.sh

@@ -0,0 +1,31 @@
+#!/bin/bash
+# Author  : Gaston Gonzalez
+# Date    : 2 October 2025
+# Purpose : Builds and installs et-portaudio
+set -e
+trap 'last_command=$current_command; current_command=$BASH_COMMAND' DEBUG
+trap 'et-log "\"${last_command}\" command failed with exit code $?."' ERR
+
+. ./env.sh
+
+APP="et-portaudio"
+VERSION="1.0.0"
+APP_AND_VERSION="${APP}-${VERSION}"
+INSTALL_DIR="/opt/${APP_AND_VERSION}"
+LINK_PATH="/opt/${APP}"
+
+et-log "Installing ${APP} ${VERSION}"
+
+CWD_DIR=`pwd`
+
+cd ../src/et-portaudio
+
+# Compile
+make install
+
+[[ -e ${LINK_PATH} ]] && rm ${LINK_PATH}
+ln -v -s ${INSTALL_DIR} ${LINK_PATH}
+
+stow -v -d /opt ${APP} -t /usr/local
+
+cd ${CWD}

scripts/install-fldigi.sh

@@ -1,6 +1,7 @@
 #!/bin/bash
 # Author  : Gaston Gonzalez
 # Date    : 17 September 2025
+# Updated : 2 October 2025
 # Purpose : Builds and installs fldigi
 set -e
 trap 'last_command=$current_command; current_command=$BASH_COMMAND' DEBUG
@@ -36,6 +37,9 @@ make
 # Install
 make install
 
+# Use wrapper script as launcher executable
+sed -i 's|^Exec.*|Exec=/opt/emcomm-tools/bin/et-fldigi start|' /opt/fldigi/share/applications/fldigi.desktop
+
 [[ -e ${LINK_PATH} ]] && rm ${LINK_PATH}
 ln -v -s ${INSTALL_DIR} ${LINK_PATH}
 

scripts/install.sh

@@ -2,7 +2,7 @@
 #
 # Author  : Gaston Gonzalez
 # Date    : 16 March 2024
-# Updated : 30 September          2025
+# Updated : 2 October 2025
 # Purpose : Main installer for EmComm Tools Community (ETC)
 
 . ./env.sh
@@ -90,4 +90,6 @@ exitIfNotRoot
 
 # Install fldigi suite
 ./install-fldigi.sh
+./install-et-portaudio.sh
+
 # TODO: add installers for flmsg and flamp

src/et-portaudio/.gitignore

@@ -0,0 +1,2 @@
+et-portaudio
+*.o

src/et-portaudio/Makefile

@@ -0,0 +1,25 @@
+CC = gcc
+CFLAGS = -Wall -O2
+LDFLAGS = -lportaudio -lasound
+
+TARGET = et-portaudio
+SRC = main.c
+VERSION=1.0.0
+INSTALL_DIR = /opt/et-portaudio-$(VERSION)/bin
+
+.PHONY: install
+
+all: $(TARGET)
+
+$(TARGET): $(SRC)
+	$(CC) $(CFLAGS) -o $(TARGET) $(SRC) $(LDFLAGS)
+
+install: $(TARGET)
+	@echo "Installing $(TARGET) to $(INSTALL_DIR)..."
+	@mkdir -p $(INSTALL_DIR)
+	@cp $(TARGET) $(INSTALL_DIR)/
+	@chmod 755 $(INSTALL_DIR)/$(TARGET)
+	@echo "Done."
+
+clean:
+	rm -f $(TARGET) *.o

src/et-portaudio/README.md

@@ -0,0 +1,32 @@
+# et-portaudio
+
+A utility program intended for script use to convert a supported
+EmComm Tools ALSA audio device (i.e. `ET_AUDIO`) to a PulseAudio device. 
+
+## Usage
+
+Returns a JSON object with the PulseAudio device details on success.
+
+```bash
+./et-portaudio 2>/dev/null
+{
+  "device": "USB Audio Device: - (hw:1,0)",
+  "index": 6
+}
+```
+
+If no supported device is found or on error, the utility exits with an
+exit status of 1.
+
+
+## Build
+
+``bash
+make
+```
+
+## Install
+
+```bash
+sudo make install
+```

src/et-portaudio/gen-fldigi-cfg.sh

@@ -0,0 +1,147 @@
+#!/bin/bash
+# Author  : Gaston Gonzalez
+# Date    : 1 October 2025
+# Updated : 2 October 2025
+# Purpose : Temporary script to fast-fail dynamic fldigi config for PnP
+#
+# NOTE: THIS IS SCRIPT IS INTENDED FOR DEVELOPMENT OF THE PNP SOLUTION. 
+
+CMD=et-portaudio
+PORT_AUDIO_CONF=/tmp/conf.tmp
+GEO_CONF=/tmp/geo.tmp
+FLDIGI_CONF_DIR="${HOME}/.fldigi"
+FLDIGI_CONF_FILE="${FLDIGI_CONF_DIR}/fldigi_def.xml"
+
+[ -z "$ET_USER_CONFIG" ] && ET_USER_CONFIG="${HOME}/.config/emcomm-tools/user.json"
+
+# clean up temporary config that may exist
+[[ -e ${PORT_AUDIO_CONF} ]] && rm ${PORT_AUDIO_CONF}
+
+[[ ! -e ${CMD} ]] && make
+./${CMD} 2>/dev/null > ${PORT_AUDIO_CONF}
+
+if [[ $? -ne 0 ]]; then
+  echo "No supported ET_AUDIO device found"
+  exit 1
+fi
+
+DEVICE=$(jq -r -e '.device' ${PORT_AUDIO_CONF})
+if [[ $? -ne 0 ]]; then
+  echo "Error getting PulseAudio device name for ET_AUDIO device"
+  exit 1
+fi
+
+INDEX=$(jq -r -e '.index' ${PORT_AUDIO_CONF})
+if [[ $? -ne 0 ]]; then
+  echo "Error getting PulseAudio device index for ET_AUDIO device"
+  exit 1
+fi
+
+################################
+# Bootstrap fldigi configuration
+################################
+et-log "Checking for .fldigi directory"
+[[ ! -e ${FLDIGI_CONF_DIR} ]] && mkdir -v ${FLDIGI_CONF_DIR}
+
+et-log "Copying fldigi template..."
+cp -v ../../overlay/etc/skel/.fldigi/fldigi_def.xml ~/.fldigi/
+
+
+##############################################
+# Map ALSA ET_AUDIO device to PortAudio device
+##############################################
+et-log "Updating PortAudio device configuration..."
+
+sed -i "s|^<AUDIOIO>.*|<AUDIOIO>1</AUDIOIO>|" ${FLDIGI_CONF_FILE}
+
+sed -i "s|^<PORTINDEVICE>.*|<PORTINDEVICE>${DEVICE}</PORTINDEVICE>|" ${FLDIGI_CONF_FILE}
+sed -i "s|^<PORTININDEX>.*|<PORTININDEX>${INDEX}</PORTININDEX>|" ${FLDIGI_CONF_FILE}
+
+sed -i "s|^<PORTOUTDEVICE>.*|<PORTOUTDEVICE>${DEVICE}</PORTOUTDEVICE>|" ${FLDIGI_CONF_FILE}
+sed -i "s|^<PORTOUTINDEX>.*|<PORTOUTINDEX>${INDEX}</PORTOUTINDEX>|" ${FLDIGI_CONF_FILE}
+
+et-log "Using device '${DEVICE}' and device index '${INDEX}' for PortAudio configuration"
+
+
+#################
+# Update callsign
+#################
+et-log "Updating callsign configuration..."
+CALLSIGN=$(jq -r -e '.callsign' ${ET_USER_CONFIG})
+
+if [[ "${CALLSIGN}" = "N0CALL" ]]; then
+   et-log "Exiting early. No callsign set. Run: et-user."
+   exit 1
+fi
+
+et-log "Using callsign '${CALLSIGN}'"
+sed -i "s|^<MYCALL>.*|<MYCALL>${CALLSIGN}</MYCALL>|" ${FLDIGI_CONF_FILE}
+
+
+###############################################
+# Update grid based on ETC geolocation services
+###############################################
+et-log "Updating your grid square..."
+curl -f -s "http://localhost:1981/api/geo/position" > ${GEO_CONF}
+
+if [[ $? -eq 0 ]]; then
+  GRID=$(jq -r -e '.position.gridSquare' ${GEO_CONF})
+  if [[ $? -eq 0 ]]; then
+    et-log "Using grid square '${GRID}' for your location"
+    sed -i "s|^<MYLOC>.*|<MYLOC>${GRID}</MYLOC>|" ${FLDIGI_CONF_FILE}
+  fi
+fi
+
+[[ -e ${GEO_CONF} ]] && rm ${GEO_CONF}
+
+
+#####################################################################
+# Configure CAT interface using Hamlib's rig control daemon (rigctld)
+#####################################################################
+et-log "Updating CAT control configuration..."
+
+sed -i "s|^<CHKUSEHAMLIBIS>.*|<CHKUSEHAMLIBIS>1</CHKUSEHAMLIBIS>|" ${FLDIGI_CONF_FILE}
+sed -i "s|^<HAMRIGMODEL>.*|<HAMRIGMODEL>2</HAMRIGMODEL>|" ${FLDIGI_CONF_FILE}
+sed -i "s|^<HAMLIBCMDPTT>.*|<HAMLIBCMDPTT>1</HAMLIBCMDPTT>|" ${FLDIGI_CONF_FILE}
+sed -i "s|^<HAMRIGDEVICE>.*|<HAMRIGDEVICE>localhost:4532</HAMRIGDEVICE>|" ${FLDIGI_CONF_FILE}
+
+
+######################################
+# Enable Reed Soloman ID for RX and TX
+######################################
+et-log "Enabling Reed Soloman ID for RX/TX..."
+
+sed -i "s|^<RECEIVERSID>.*|<RECEIVERSID>1</RECEIVERSID>|" ${FLDIGI_CONF_FILE}
+sed -i "s|^<TRANSMITRSID>.*|<TRANSMITRSID>1</TRANSMITRSID>|" ${FLDIGI_CONF_FILE}
+
+
+###########################
+# Modem configuration: MT63
+###########################
+et-log "Updating MT63 modem configuration..."
+
+sed -i "s|^<MT63INTEGRATION>.*|<MT63INTEGRATION>1</MT63INTEGRATION>|" ${FLDIGI_CONF_FILE}
+
+
+########################
+# Repeater configuration
+########################
+et-log "Updating settings for linked repeater systems..."
+
+# Key up for 2 seconds before transmitting tone. Needed for linked repeater systems.
+sed -i "s|^<PRETONE>.*|<PRETONE>2</PRETONE>|" ${FLDIGI_CONF_FILE}
+
+
+#####################
+# NBEMS configuration
+#####################
+et-log "Updating settings for NBEMS..."
+
+sed -i "s|^<OPEN_NBEMS_FOLDER>.*|<OPEN_NBEMS_FOLDER>1</OPEN_NBEMS_FOLDER>|" ${FLDIGI_CONF_FILE}
+sed -i "s|^<FLMSG_PATHNAME>.*|<FLMSG_PATHNAME>/usr/local/bin/flmsg</FLMSG_PATHNAME>|" ${FLDIGI_CONF_FILE}
+
+# TODO: Add flmsg to ETC installer
+# TODO: Add flamp to ETC installer
+# TODO: Revisit autostart configuration to start flamp
+# TODO: Revisit TCP/IP configuration when porting ETC R2 Build 56
+# TODO: Define TTP/ETC macros

src/et-portaudio/main.c

@@ -0,0 +1,89 @@
+/*
+ * Author  : Gaston Gonzalez
+ * Date    : 1 October 2025
+ * Purpose : Maps an ET_AUDIO ALSA device to a PortAudio device.
+ *
+ * This utility enumerates all ALSA audio devices using PortAudio
+ * to identify a currently plugged-in ET_AUDIO device. If a matching 
+ * device is found, it generates a JSON object on STDOUT containing:
+ *
+ *  - PortAudio device name
+ *  - PortAudio device index
+ *
+ * Exit Status:
+ *   0 - ET_AUDIO device found and JSON output generated successfully
+ *   1 - ET_AUDIO device not found
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include "portaudio.h"
+
+#define PROC_ALSA_PATH_FMT "/proc/asound/card%d/id"
+
+// Read the ALSA card ID from the /proc filesystem
+int get_alsa_card_id(int card, char *id_buf, size_t buf_size) {
+    char path[64];
+    snprintf(path, sizeof(path), PROC_ALSA_PATH_FMT, card);
+    FILE *f = fopen(path, "r");
+    if (!f) return -1;
+    if (!fgets(id_buf, buf_size, f)) {
+        fclose(f);
+        return -1;
+    }
+    id_buf[strcspn(id_buf, "\n")] = 0; 
+    fclose(f);
+
+    return 0;
+}
+
+int main(void) {
+    PaError err;
+    int i, numDevices;
+    const PaDeviceInfo *deviceInfo;
+    const PaHostApiInfo *hostApiInfo;
+    int found = 0;  
+
+    err = Pa_Initialize();
+    if (err != paNoError) {
+        fprintf(stderr, "PortAudio error: %s\n", Pa_GetErrorText(err));
+        return 1;
+    }
+
+    numDevices = Pa_GetDeviceCount();
+    if (numDevices < 0) {
+        fprintf(stderr, "No audio devices found");
+        Pa_Terminate();
+        return 1;
+    }
+
+    for (i = 0; i < numDevices; i++) {
+        deviceInfo = Pa_GetDeviceInfo(i);
+        hostApiInfo = Pa_GetHostApiInfo(deviceInfo->hostApi);
+
+        // Only show ALSA devices
+        if (hostApiInfo && strcmp(hostApiInfo->name, "ALSA") == 0) {
+            int card = -1, device = -1;
+
+            // Extract ALSA card and device (hw:X,Y)
+            if (sscanf(deviceInfo->name, "%*[^()](hw:%d,%d)", &card, &device) == 2) {
+                char card_id[64];
+                if (get_alsa_card_id(card, card_id, sizeof(card_id)) == 0) {
+
+                    // Only print if card ID matches ET_AUDIO
+                    if (strcmp(card_id, "ET_AUDIO") == 0) {
+                        found = 1;
+                        printf("{\n");
+                        printf("  \"device\": \"%s\",\n", deviceInfo->name);
+                        printf("  \"index\": %d\n", i);
+                        printf("}\n");
+                    }
+                }
+            }
+        }
+    }
+
+    Pa_Terminate();
+    return found ? 0 : 1;
+}

tests/test-et-portaudio.sh

@@ -0,0 +1,7 @@
+#!/bin/bash
+# Author   : Gaston Gonzalez
+# Date     : 2 October 2025
+# Purpose  : Test et-portaudio installation
+
+OUT=$(which et-portaudio)
+exit $?