initial commit

test_dsoundcard.sh

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+#!/bin/bash
+
+# Test recording script using dsoundcard ALSA plugin
+# This plugin bridges DEP audio without requiring hardware clocking
+
+OUTPUT_DIR="./recordings"
+DURATION=10  # seconds
+TIMESTAMP=$(date +%Y%m%d_%H%M%S)
+OUTPUT_FILE="${OUTPUT_DIR}/dsoundcard_${TIMESTAMP}.wav"
+
+# Create output directory
+mkdir -p "$OUTPUT_DIR"
+
+echo "=========================================="
+echo "DEP dsoundcard ALSA Plugin Test"
+echo "=========================================="
+echo "Recording from DEP via dsoundcard plugin"
+echo "Duration: $DURATION seconds"
+echo "Output file: $OUTPUT_FILE"
+echo "=========================================="
+echo ""
+
+# Check if DEP is running
+if ! pgrep -f "dep_manager" > /dev/null; then
+    echo "ERROR: DEP is not running!"
+    echo "Start DEP first: cd /home/caster/dante_beacon && sudo bash dep.sh start"
+    exit 1
+fi
+
+# Check if dsoundcard is available
+if ! aplay -L | grep -q "dsoundcard"; then
+    echo "ERROR: dsoundcard ALSA plugin not found!"
+    echo "Make sure dsoundcard.so is installed in /opt/dep/"
+    echo "And ~/.asoundrc is configured correctly"
+    exit 1
+fi
+
+echo "Starting recording..."
+echo ""
+
+# Record with larger buffer to avoid overruns
+# -D: ALSA device
+# -c: channels (6 for DEP RX)
+# -f: format (S16_LE = 16-bit signed little endian)
+# -r: sample rate (48000 Hz)
+# -d: duration
+# --buffer-size: larger buffer to prevent overruns
+arecord -D dsoundcard -c 6 -f S16_LE -r 48000 -d $DURATION --buffer-size=4096 "$OUTPUT_FILE"
+
+RECORD_EXIT=$?
+
+echo ""
+echo "=========================================="
+if [ $RECORD_EXIT -eq 0 ]; then
+    echo "Recording complete!"
+else
+    echo "Recording completed with warnings"
+fi
+echo "=========================================="
+
+# Check if file was created
+if [ -f "$OUTPUT_FILE" ]; then
+    FILE_SIZE=$(ls -lh "$OUTPUT_FILE" | awk '{print $5}')
+    echo "Output file: $OUTPUT_FILE"
+    echo "File size: $FILE_SIZE"
+    echo ""
+    
+    # Try to get audio info if sox is available
+    if command -v sox &> /dev/null; then
+        echo "Audio file info:"
+        sox "$OUTPUT_FILE" -n stat 2>&1 | grep -E "Sample Rate|Channels|Duration|Length|Maximum amplitude|RMS"
+    fi
+    
+    echo ""
+    echo "To play the recording:"
+    echo "  aplay $OUTPUT_FILE"
+    echo ""
+    echo "To split into individual channels:"
+    echo "  for i in {1..6}; do"
+    echo "    sox $OUTPUT_FILE ${OUTPUT_FILE%.wav}_ch\$i.wav remix \$i"
+    echo "  done"
+else
+    echo "ERROR: Recording file was not created!"
+fi
+
+echo ""
+echo "=========================================="
+echo ""
+echo "NOTE: The dsoundcard plugin provides direct access to DEP"
+echo "audio buffers without requiring hardware clock synchronization."
+echo "This is the recommended method for ALSA integration with DEP."
+echo ""