Add live mesh traffic view

.gitignore

@@ -80,10 +80,11 @@ create_feature_graphic.py
 # Tool caches and local state
 .cachebro/
 .osgrep/
+third_party/lpcnet_flutter/
 
 # Claude Code local settings (permissions, personal config)
 .claude/settings.local.json
 
 # Dart code coverage
 coverage/
-lcov.info
+lcov.info

ios/Podfile.lock

@@ -57,8 +57,6 @@ PODS:
     - FlutterMacOS
   - image_picker_ios (0.0.1):
     - Flutter
-  - lpcnet_flutter (0.1.0):
-    - Flutter
   - nsd_ios (0.0.1):
     - Flutter
   - package_info_plus (0.4.5):
@@ -100,7 +98,6 @@ DEPENDENCIES:
   - flutter_local_notifications (from `.symlinks/plugins/flutter_local_notifications/ios`)
   - geolocator_apple (from `.symlinks/plugins/geolocator_apple/darwin`)
   - image_picker_ios (from `.symlinks/plugins/image_picker_ios/ios`)
-  - lpcnet_flutter (from `.symlinks/plugins/lpcnet_flutter/ios`)
   - nsd_ios (from `.symlinks/plugins/nsd_ios/ios`)
   - package_info_plus (from `.symlinks/plugins/package_info_plus/ios`)
   - path_provider_foundation (from `.symlinks/plugins/path_provider_foundation/darwin`)
@@ -144,8 +141,6 @@ EXTERNAL SOURCES:
     :path: ".symlinks/plugins/geolocator_apple/darwin"
   image_picker_ios:
     :path: ".symlinks/plugins/image_picker_ios/ios"
-  lpcnet_flutter:
-    :path: ".symlinks/plugins/lpcnet_flutter/ios"
   nsd_ios:
     :path: ".symlinks/plugins/nsd_ios/ios"
   package_info_plus:
@@ -182,7 +177,6 @@ SPEC CHECKSUMS:
   flutter_local_notifications: 643a3eda1ce1c0599413ca31672536d423dee214
   geolocator_apple: ab36aa0e8b7d7a2d7639b3b4e48308394e8cef5e
   image_picker_ios: e0ece4aa2a75771a7de3fa735d26d90817041326
-  lpcnet_flutter: 67a3c72ea4caa511373ee9b028223e33f0e85b97
   nsd_ios: 596ad79109ddd3e52d665f650f36428049e3653e
   package_info_plus: af8e2ca6888548050f16fa2f1938db7b5a5df499
   path_provider_foundation: bb55f6dbba17d0dccd6737fe6f7f34fbd0376880

lib/providers/voice_provider.dart

@@ -325,25 +325,7 @@ class VoiceProvider with ChangeNotifier {
   }
 
   Int16List _preparePlaybackPcm(Int16List pcm, VoicePacketMode mode) {
-    if (pcm.isEmpty) {
+    return pcm;
-      return pcm;
-    }
-
-    if (mode.codec != VoiceCodecKind.lpcnet) {
-      return pcm;
-    }
-
-    final output = Int16List(pcm.length);
-    var dc = 0.0;
-    const dcAlpha = 0.995;
-
-    for (var i = 0; i < pcm.length; i++) {
-      final sample = pcm[i].toDouble();
-      dc = (dcAlpha * dc) + ((1.0 - dcAlpha) * sample);
-      final filtered = sample - dc;
-      output[i] = filtered.clamp(-32768.0, 32767.0).round();
-    }
-    return output;
   }
 
   Future<void> clearStoredVoiceData() async {

lib/screens/messages_tab.dart

@@ -24,7 +24,6 @@ import '../widgets/messages/messages_content.dart';
 import '../widgets/common/contact_avatar.dart';
 import '../services/message_destination_preferences.dart';
 import '../services/voice_bitrate_preferences.dart';
-import '../services/voice_codec_preferences.dart';
 import '../services/voice_recorder_service.dart';
 import '../services/voice_codec_service.dart';
 import '../utils/toast_logger.dart';
@@ -72,7 +71,7 @@ class _MessagesTabState extends State<MessagesTab> {
   final VoiceRecorderService _voiceRecorder = VoiceRecorderService();
   bool _isRecording = false;
   bool _isSendingVoice = false;
-  static const Duration _maxVoiceRecordingDuration = Duration(seconds: 4);
+  static const Duration _maxVoiceRecordingDuration = Duration(seconds: 30);
   static const double _silenceRmsThreshold = 500.0;
   static const double _silencePeakThreshold = 1400.0;
   static const int _maxInteriorSilentChunks = 2;
@@ -82,7 +81,6 @@ class _MessagesTabState extends State<MessagesTab> {
   final List<Int16List> _recordedChunks = [];
   VoicePacketMode? _activeVoiceMode;
   int _selectedVoiceBitrate = VoiceBitratePreferences.defaultBitrate;
-  VoiceCodecKind _selectedVoiceCodec = VoiceCodecPreferences.defaultCodec;
 
   @override
   void initState() {
@@ -98,11 +96,9 @@ class _MessagesTabState extends State<MessagesTab> {
 
   Future<void> _loadVoiceSettings() async {
     final bitrate = await VoiceBitratePreferences.getBitrate();
-    final codec = await VoiceCodecPreferences.getCodec();
     if (!mounted) return;
     setState(() {
       _selectedVoiceBitrate = bitrate;
-      _selectedVoiceCodec = codec;
     });
   }
 
@@ -823,15 +819,12 @@ class _MessagesTabState extends State<MessagesTab> {
     debugPrint('🎙️ [Voice] _startVoiceRecording called');
     // Read fresh voice preferences so settings changes apply immediately.
     final selectedBitrate = await VoiceBitratePreferences.getBitrate();
-    final selectedCodec = await VoiceCodecPreferences.getCodec();
     if (mounted) {
       setState(() {
         _selectedVoiceBitrate = selectedBitrate;
-        _selectedVoiceCodec = selectedCodec;
       });
     } else {
       _selectedVoiceBitrate = selectedBitrate;
-      _selectedVoiceCodec = selectedCodec;
     }
     final hasPermission = await _voiceRecorder.requestPermission();
     debugPrint('🎙️ [Voice] hasPermission=$hasPermission');
@@ -859,9 +852,9 @@ class _MessagesTabState extends State<MessagesTab> {
       (_) => rng.nextInt(256),
     ).map((b) => b.toRadixString(16).padLeft(2, '0')).join();
 
-    _activeVoiceMode = _selectedVoiceCodec == VoiceCodecKind.lpcnet
+    _activeVoiceMode = VoiceBitratePreferences.toVoiceMode(
-        ? VoicePacketMode.lpcnet1600
+      _selectedVoiceBitrate,
-        : VoiceBitratePreferences.toVoiceMode(_selectedVoiceBitrate);
+    );
     final packetDuration = Duration(
       milliseconds: _activeVoiceMode!.packetDurationMs,
     );
@@ -878,7 +871,6 @@ class _MessagesTabState extends State<MessagesTab> {
       final stream = _voiceRecorder.startCapture(
         chunkDuration: packetDuration,
         sampleRateHz: _activeVoiceMode!.sampleRateHz,
-        codecKind: _activeVoiceMode!.codec,
         enableBandPassFilter: appProvider.isVoiceBandPassFilterEnabled,
         enableCompressor: appProvider.isVoiceCompressorEnabled,
         enableLimiter: appProvider.isVoiceLimiterEnabled,
@@ -1021,15 +1013,10 @@ class _MessagesTabState extends State<MessagesTab> {
     debugPrint(
       '🎙️ [Voice] encoding $total packets for deferred voice fetch, mode=${mode.label}, session=$sessionId',
     );
-    final encodedChunks = mode.codec == VoiceCodecKind.lpcnet
-        ? await _encodeLpcNetChunks(codec, chunks, mode)
-        : <Uint8List>[];
     for (var i = 0; i < total; i++) {
       if (!mounted) return;
       try {
-        final codec2Data = mode.codec == VoiceCodecKind.lpcnet
+        final codec2Data = await codec.encode(chunks[i], mode);
-            ? encodedChunks[i]
-            : await codec.encode(chunks[i], mode);
         debugPrint(
           '🎙️ [Voice] packet $i/$total encoded: ${codec2Data.length} bytes',
         );
@@ -1133,36 +1120,6 @@ class _MessagesTabState extends State<MessagesTab> {
     messagesProvider.markMessageSent(msgId, 0, 0);
   }
 
-  Future<List<Uint8List>> _encodeLpcNetChunks(
-    VoiceCodecService codec,
-    List<Int16List> chunks,
-    VoicePacketMode mode,
-  ) async {
-    final totalSamples = chunks.fold<int>(
-      0,
-      (sum, chunk) => sum + chunk.length,
-    );
-    final merged = Int16List(totalSamples);
-    final encodedByteLengths = <int>[];
-    var sampleOffset = 0;
-    for (final chunk in chunks) {
-      merged.setRange(sampleOffset, sampleOffset + chunk.length, chunk);
-      sampleOffset += chunk.length;
-      encodedByteLengths.add((chunk.length ~/ 640) * 8);
-    }
-
-    final encoded = await codec.encode(merged, mode);
-    final encodedChunks = <Uint8List>[];
-    var byteOffset = 0;
-    for (final length in encodedByteLengths) {
-      encodedChunks.add(
-        Uint8List.sublistView(encoded, byteOffset, byteOffset + length),
-      );
-      byteOffset += length;
-    }
-    return encodedChunks;
-  }
-
   List<Int16List> _prepareChunksForSending(
     List<Int16List> chunks,
     VoicePacketMode mode,

lib/screens/settings_screen.dart

@@ -19,7 +19,6 @@ import '../services/locale_preferences.dart';
 import '../services/mesh_map_nodes_service.dart';
 import '../services/update_checker_service.dart';
 import '../services/voice_bitrate_preferences.dart';
-import '../services/voice_codec_preferences.dart';
 import '../services/image_preferences.dart';
 import '../services/route_hash_preferences.dart';
 import '../services/image_codec_service.dart';
@@ -60,7 +59,6 @@ class _SettingsScreenState extends State<SettingsScreen> {
   bool _showRxTxIndicators = true;
   bool _isCheckingForUpdates = false;
   int _voiceBitrate = VoiceBitratePreferences.defaultBitrate;
-  VoiceCodecKind _voiceCodec = VoiceCodecPreferences.defaultCodec;
   int _routeHashSize = RouteHashPreferences.defaultHashSize;
   int _imageMaxSize = ImagePreferences.defaultMaxSize;
   int _imageCompression = ImagePreferences.defaultQuality;
@@ -181,11 +179,9 @@ class _SettingsScreenState extends State<SettingsScreen> {
 
   Future<void> _loadVoicePreferences() async {
     final value = await VoiceBitratePreferences.getBitrate();
-    final codec = await VoiceCodecPreferences.getCodec();
     if (!mounted) return;
     setState(() {
       _voiceBitrate = value;
-      _voiceCodec = codec;
     });
   }
 
@@ -197,27 +193,10 @@ class _SettingsScreenState extends State<SettingsScreen> {
     });
   }
 
-  Future<void> _saveVoiceCodecPreference(VoiceCodecKind value) async {
-    await VoiceCodecPreferences.setCodec(value);
-    if (!mounted) return;
-    setState(() {
-      _voiceCodec = value;
-    });
-  }
-
   String _voiceBitrateSubtitle(int bitrate) {
-    if (_voiceCodec == VoiceCodecKind.lpcnet) {
-      return 'Fixed 1600 bps';
-    }
     return '$bitrate bps';
   }
 
-  String _voiceCodecSubtitle() {
-    return _voiceCodec == VoiceCodecKind.codec2
-        ? 'Selectable low-bitrate modes'
-        : 'Fixed 16 kHz / 1.6 kbps mode';
-  }
-
   Future<void> _loadRouteHashSizePreference() async {
     final value = await RouteHashPreferences.getHashSize();
     if (!mounted) return;
@@ -1179,7 +1158,6 @@ class _SettingsScreenState extends State<SettingsScreen> {
           Consumer2<AppProvider, ConnectionProvider>(
             builder: (context, appProvider, connectionProvider, child) =>
                 _buildVoiceStatsCard(
-                  codec: _voiceCodec,
                   bitrate: _voiceBitrate,
                   connectionProvider: connectionProvider,
                   bandPassEnabled: appProvider.isVoiceBandPassFilterEnabled,
@@ -1194,22 +1172,12 @@ class _SettingsScreenState extends State<SettingsScreen> {
                 ),
           ),
           _buildSettingsCard([
-            ListTile(
-              leading: const Icon(Icons.record_voice_over),
-              title: const Text('Voice codec'),
-              subtitle: Text(_voiceCodecSubtitle()),
-              trailing: const Icon(Icons.chevron_right),
-              onTap: _showVoiceCodecDialog,
-            ),
             ListTile(
               leading: const Icon(Icons.graphic_eq),
               title: const Text('Voice bitrate'),
               subtitle: Text(_voiceBitrateSubtitle(_voiceBitrate)),
               trailing: const Icon(Icons.chevron_right),
-              enabled: _voiceCodec == VoiceCodecKind.codec2,
+              onTap: _showVoiceBitrateDialog,
-              onTap: _voiceCodec == VoiceCodecKind.codec2
-                  ? _showVoiceBitrateDialog
-                  : null,
             ),
             Consumer<AppProvider>(
               builder: (context, appProvider, child) => SwitchListTile(
@@ -1797,7 +1765,6 @@ class _SettingsScreenState extends State<SettingsScreen> {
   }
 
   Widget _buildVoiceStatsCard({
-    required VoiceCodecKind codec,
     required int bitrate,
     required ConnectionProvider connectionProvider,
     required bool bandPassEnabled,
@@ -1826,9 +1793,7 @@ class _SettingsScreenState extends State<SettingsScreen> {
     final radioSf = connectionProvider.deviceInfo.radioSf;
     final radioCr = connectionProvider.deviceInfo.radioCr;
     final bwHz = _resolveBandwidthHz(radioBw);
-    final voiceMode = codec == VoiceCodecKind.lpcnet
+    final voiceMode = VoiceBitratePreferences.toVoiceMode(bitrate);
-        ? VoicePacketMode.lpcnet1600
-        : VoiceBitratePreferences.toVoiceMode(bitrate);
     const voicePreviewMs = 10000; // 10-second reference clip
     final packetDurationMs = voiceMode.packetDurationMs;
     final voicePacketCount =
@@ -1865,7 +1830,7 @@ class _SettingsScreenState extends State<SettingsScreen> {
             ),
             const SizedBox(height: 8),
             Text(
-              'Codec: ${voiceMode.label}${codec == VoiceCodecKind.codec2 ? ' · $bitrate bps' : ' · 1600 bps'}',
+              'Codec: ${voiceMode.label} · $bitrate bps',
               style: Theme.of(context).textTheme.bodySmall,
             ),
             const SizedBox(height: 4),
@@ -2219,47 +2184,6 @@ class _SettingsScreenState extends State<SettingsScreen> {
     );
   }
 
-  void _showVoiceCodecDialog() {
-    showDialog(
-      context: context,
-      builder: (context) => AlertDialog(
-        title: const Text('Voice codec'),
-        content: SingleChildScrollView(
-          child: RadioGroup<VoiceCodecKind>(
-            groupValue: _voiceCodec,
-            onChanged: (value) {
-              if (value != null) {
-                _saveVoiceCodecPreference(value);
-              }
-              Navigator.pop(context);
-            },
-            child: Column(
-              mainAxisSize: MainAxisSize.min,
-              children: [
-                RadioListTile<VoiceCodecKind>(
-                  value: VoiceCodecKind.codec2,
-                  title: const Text('Codec2'),
-                  subtitle: const Text('Selectable ultra-low bitrate modes'),
-                ),
-                RadioListTile<VoiceCodecKind>(
-                  value: VoiceCodecKind.lpcnet,
-                  title: const Text('LPCNet'),
-                  subtitle: const Text('Fixed 16 kHz / 1.6 kbps neural mode'),
-                ),
-              ],
-            ),
-          ),
-        ),
-        actions: [
-          TextButton(
-            onPressed: () => Navigator.pop(context),
-            child: Text(AppLocalizations.of(context)!.cancel),
-          ),
-        ],
-      ),
-    );
-  }
-
   void _showAboutDialog() {
     showDialog(
       context: context,

lib/services/voice_codec_service_io.dart

@@ -1,6 +1,5 @@
 import 'dart:typed_data';
 import 'package:codec2_flutter/codec2_flutter.dart';
-import 'package:lpcnet_flutter/lpcnet_flutter.dart';
 import 'package:flutter/foundation.dart';
 import '../utils/voice_message_parser.dart';
 
@@ -20,8 +19,6 @@ Codec2Mode codec2ModeFor(VoicePacketMode pktMode) {
       return Codec2Mode.mode1300;
     case VoicePacketMode.mode2400:
       return Codec2Mode.mode2400;
-    case VoicePacketMode.lpcnet1600:
-      throw ArgumentError('LPCNet mode does not map to Codec2');
   }
 }
 
@@ -48,22 +45,12 @@ class VoiceCodecService {
 
   Future<Uint8List> encode(Int16List pcm, VoicePacketMode mode) {
     _ensureCodec2Supported();
-    switch (mode.codec) {
+    return Codec2.encodeInIsolate(pcm, codec2ModeFor(mode));
-      case VoiceCodecKind.codec2:
-        return Codec2.encodeInIsolate(pcm, codec2ModeFor(mode));
-      case VoiceCodecKind.lpcnet:
-        return LpcNet.encodeInIsolate(pcm);
-    }
   }
 
   Future<Int16List> decode(Uint8List codec2Bytes, VoicePacketMode mode) {
     _ensureCodec2Supported();
-    switch (mode.codec) {
+    return Codec2.decodeInIsolate(codec2Bytes, codec2ModeFor(mode));
-      case VoiceCodecKind.codec2:
-        return Codec2.decodeInIsolate(codec2Bytes, codec2ModeFor(mode));
-      case VoiceCodecKind.lpcnet:
-        return LpcNet.decodeInIsolate(codec2Bytes);
-    }
   }
 
   /// Decode and concatenate multiple [packets] into a single PCM Int16List.
@@ -73,9 +60,6 @@ class VoiceCodecService {
     VoicePacketMode mode,
   ) async {
     _ensureCodec2Supported();
-    if (mode.codec == VoiceCodecKind.lpcnet) {
-      return _decodeLpcNetPackets(packets, mode);
-    }
     final all = <Int16List>[];
     for (final pkt in packets) {
       if (pkt == null || pkt.codec2Data.isEmpty) {
@@ -93,38 +77,4 @@ class VoiceCodecService {
     }
     return result;
   }
-
-  Future<Int16List> _decodeLpcNetPackets(
-    List<VoicePacket?> packets,
-    VoicePacketMode mode,
-  ) async {
-    final segments = <Int16List>[];
-    final run = <int>[];
-
-    Future<void> flushRun() async {
-      if (run.isEmpty) return;
-      final decoded = await LpcNet.decodeInIsolate(Uint8List.fromList(run));
-      segments.add(decoded);
-      run.clear();
-    }
-
-    for (final pkt in packets) {
-      if (pkt == null || pkt.codec2Data.isEmpty) {
-        await flushRun();
-        segments.add(Int16List(mode.samplesPerPacket));
-        continue;
-      }
-      run.addAll(pkt.codec2Data);
-    }
-    await flushRun();
-
-    final total = segments.fold<int>(0, (sum, chunk) => sum + chunk.length);
-    final result = Int16List(total);
-    var offset = 0;
-    for (final chunk in segments) {
-      result.setRange(offset, offset + chunk.length, chunk);
-      offset += chunk.length;
-    }
-    return result;
-  }
 }

lib/services/voice_codec_service_stub.dart

@@ -60,8 +60,6 @@ Codec2Mode codec2ModeFor(VoicePacketMode pktMode) {
       return Codec2Mode.mode1300;
     case VoicePacketMode.mode2400:
       return Codec2Mode.mode2400;
-    case VoicePacketMode.lpcnet1600:
-      throw ArgumentError('LPCNet mode does not map to Codec2');
   }
 }
 

lib/services/voice_recorder_service.dart

@@ -3,7 +3,6 @@ import 'dart:math' as math;
 import 'dart:typed_data';
 import 'package:flutter/foundation.dart';
 import 'package:record/record.dart';
-import '../utils/voice_message_parser.dart';
 
 /// Captures raw PCM audio at a codec-selected sample rate, 16-bit mono.
 ///
@@ -32,7 +31,6 @@ class VoiceRecorderService {
   Stream<Int16List> startCapture({
     Duration chunkDuration = const Duration(seconds: 1),
     int sampleRateHz = 8000,
-    VoiceCodecKind codecKind = VoiceCodecKind.codec2,
     bool enableBandPassFilter = true,
     bool enableCompressor = true,
     bool enableLimiter = true,
@@ -50,7 +48,6 @@ class VoiceRecorderService {
     _startRecording(
       chunkDuration,
       sampleRateHz: sampleRateHz,
-      codecKind: codecKind,
       enableBandPassFilter: enableBandPassFilter,
       enableCompressor: enableCompressor,
       enableLimiter: enableLimiter,
@@ -64,7 +61,6 @@ class VoiceRecorderService {
   Future<void> _startRecording(
     Duration chunkDuration, {
     required int sampleRateHz,
-    required VoiceCodecKind codecKind,
     required bool enableBandPassFilter,
     required bool enableCompressor,
     required bool enableLimiter,
@@ -72,10 +68,9 @@ class VoiceRecorderService {
     required bool enableEchoCancellation,
     required bool enableNoiseSuppression,
   }) async {
-    final bypassProcessing = codecKind == VoiceCodecKind.lpcnet;
+    final useBandPassFilter = enableBandPassFilter;
-    final useBandPassFilter = !bypassProcessing && enableBandPassFilter;
+    final useCompressor = enableCompressor;
-    final useCompressor = !bypassProcessing && enableCompressor;
+    final useLimiter = enableLimiter;
-    final useLimiter = !bypassProcessing && enableLimiter;
     final config = RecordConfig(
       encoder: AudioEncoder.pcm16bits,
       sampleRate: sampleRateHz,
@@ -88,25 +83,21 @@ class VoiceRecorderService {
 
     try {
       final stream = await _recorder.startStream(config);
-      final voiceFilter = bypassProcessing
+      final voiceFilter = _VoiceBandPassFilter(
-          ? null
+        sampleRate: sampleRateHz,
-          : _VoiceBandPassFilter(
+        lowCutHz: 250.0,
-              sampleRate: sampleRateHz,
+        highCutHz: 3400.0,
-              lowCutHz: 250.0,
+      );
-              highCutHz: 3400.0,
+      final dynamics = _VoiceDynamicsProcessor(
-            );
+        sampleRate: sampleRateHz,
-      final dynamics = bypassProcessing
+        thresholdDb: -18.0,
-          ? null
+        ratio: 2.5,
-          : _VoiceDynamicsProcessor(
+        attackMs: 8.0,
-              sampleRate: sampleRateHz,
+        releaseMs: 120.0,
-              thresholdDb: -18.0,
+        makeupGainDb: 4.0,
-              ratio: 2.5,
+        enableCompressor: useCompressor,
-              attackMs: 8.0,
+        enableLimiter: useLimiter,
-              releaseMs: 120.0,
+      );
-              makeupGainDb: 4.0,
-              enableCompressor: useCompressor,
-              enableLimiter: useLimiter,
-            );
       final chunkBytes =
           sampleRateHz * 2 * chunkDuration.inMilliseconds ~/ 1000;
       final buffer = <int>[];
@@ -118,28 +109,16 @@ class VoiceRecorderService {
             final chunk = buffer.sublist(0, chunkBytes);
             buffer.removeRange(0, chunkBytes);
             final pcm = _bytesToInt16(Uint8List.fromList(chunk));
-            if (bypassProcessing) {
+            final filtered = useBandPassFilter ? voiceFilter.process(pcm) : pcm;
-              _controller?.add(pcm);
+            _controller?.add(dynamics.process(filtered));
-            } else {
-              final filtered = useBandPassFilter
-                  ? voiceFilter!.process(pcm)
-                  : pcm;
-              _controller?.add(dynamics!.process(filtered));
-            }
           }
         },
         onDone: () {
           if (buffer.isNotEmpty) {
             final padded = _padToEven(buffer);
             final pcm = _bytesToInt16(Uint8List.fromList(padded));
-            if (bypassProcessing) {
+            final filtered = useBandPassFilter ? voiceFilter.process(pcm) : pcm;
-              _controller?.add(pcm);
+            _controller?.add(dynamics.process(filtered));
-            } else {
-              final filtered = useBandPassFilter
-                  ? voiceFilter!.process(pcm)
-                  : pcm;
-              _controller?.add(dynamics!.process(filtered));
-            }
           }
           _controller?.close();
         },

lib/utils/voice_message_parser.dart

@@ -12,8 +12,7 @@ const int _defaultLoRaExplicitHeader = 1;
 const double _defaultAirtimeBudgetFactor = 1.0; // one half duty-cycle
 
 enum VoiceCodecKind {
-  codec2(0, 'Codec2'),
+  codec2(0, 'Codec2');
-  lpcnet(1, 'LPCNet');
 
   const VoiceCodecKind(this.id, this.label);
   final int id;
@@ -29,8 +28,7 @@ enum VoicePacketMode {
   mode1300(3, '1300', VoiceCodecKind.codec2, 8000, 175, 880),
   mode1400(4, '1400', VoiceCodecKind.codec2, 8000, 175, 880),
   mode1600(5, '1600', VoiceCodecKind.codec2, 8000, 200, 800),
-  mode3200(6, '3200', VoiceCodecKind.codec2, 8000, 400, 400),
+  mode3200(6, '3200', VoiceCodecKind.codec2, 8000, 400, 400);
-  lpcnet1600(7, 'LPCNet', VoiceCodecKind.lpcnet, 16000, 200, 40);
 
   const VoicePacketMode(
     this.id,
@@ -176,8 +174,14 @@ class VoicePacket {
 
   /// Estimated audio duration of this packet in milliseconds.
   int get durationMs {
-    if (mode.bytesPerSecond == 0) return 0;
+    try {
-    return (codec2Data.length * 1000 ~/ mode.bytesPerSecond).clamp(0, 1500);
+      final bytesPerSecond = voiceModeBytesPerSecond(mode);
+      if (bytesPerSecond <= 0) return 0;
+      return (codec2Data.length * 1000 ~/ bytesPerSecond).clamp(0, 1500);
+    } catch (_) {
+      // Be permissive with stale or malformed persisted voice metadata.
+      return 0;
+    }
   }
 
   @override
@@ -257,7 +261,13 @@ class VoiceEnvelope {
 }
 
 int voiceModeBytesPerSecond(VoicePacketMode mode) => switch (mode) {
-  _ => mode.bytesPerSecond,
+  VoicePacketMode.mode700c => 100,
+  VoicePacketMode.mode1200 => 150,
+  VoicePacketMode.mode2400 => 300,
+  VoicePacketMode.mode1300 => 175,
+  VoicePacketMode.mode1400 => 175,
+  VoicePacketMode.mode1600 => 200,
+  VoicePacketMode.mode3200 => 400,
 };
 
 /// Approximate end-to-end transmit time for a voice session over MeshCore LoRa.

pubspec.lock

@@ -775,15 +775,6 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "6.1.0"
-  lpcnet_flutter:
-    dependency: "direct main"
-    description:
-      path: "."
-      ref: main
-      resolved-ref: "39fadf011552a785993657506aedff85186b968b"
-      url: "https://github.com/dz0ny/lpcnet_flutter.git"
-    source: git
-    version: "0.1.0"
   matcher:
     dependency: transitive
     description:

pubspec.yaml

@@ -51,10 +51,6 @@ dependencies:
     git:
       url: https://github.com/dz0ny/codec2_flutter.git
       ref: 03998a2
-  lpcnet_flutter:
-    git:
-      url: https://github.com/dz0ny/lpcnet_flutter.git
-      ref: main
   ffi: ^2.1.0
 
   # Voice recording (raw PCM stream at 8000 Hz)