diff --git a/audio_splitter/defaults.py b/audio_splitter/defaults.py
new file mode 100644
index 0000000..b6a66d4
--- /dev/null
+++ b/audio_splitter/defaults.py
@@ -0,0 +1,35 @@
+"""Default values for all configurable options shared between CLI, web backend, and frontend."""
+
+# Output container format (used when user doesn't specify one; auto-detection overrides this)
+DEFAULT_FORMAT = "mp3"
+
+# Filename template
+DEFAULT_OUTPUT_TEMPLATE = "%an-%tn.%ext"
+
+# Character replacement
+DEFAULT_REPLACEMENT_CHAR = "_"
+DEFAULT_BAD_CHARS = r'!@#№$;:%^&?*(){}[]\/<>+=~`\' '
+
+# Tracklist parsing
+DEFAULT_TRACKLIST_FORMAT = "%ts %tn - %an"
+
+# Metadata defaults
+DEFAULT_ALBUM = None
+DEFAULT_COMMENT = None
+DEFAULT_COMMENT_STREAM = None
+DEFAULT_COMMENT_SEPARATOR = "; "
+DEFAULT_NO_COMMENT = False
+DEFAULT_MERGE_COMMENTS = False
+
+# Stream handling
+DEFAULT_DROP_VIDEO = False
+DEFAULT_DROP_SUBS = False
+
+# Filename/export options
+DEFAULT_NUMBER_TRACKS = False
+DEFAULT_REPLACE_BAD_CHARS = True
+DEFAULT_SKIP_EXISTING = False
+DEFAULT_DELETE_ORIGINAL = False
+
+# Transcoding (None means copy codec)
+DEFAULT_TRANSCODE_TO = None
diff --git a/audio_splitter/main.py b/audio_splitter/main.py
index 535cc47..4c83bc9 100644
--- a/audio_splitter/main.py
+++ b/audio_splitter/main.py
@@ -1,133 +1,67 @@
 """Command‑line interface and entry point."""
 
+import argparse
 import os
 import sys
 import subprocess
-import argparse
 
 from .constants import DEFAULT_BAD_CHARS
-from .tracklist import read_tracklist, parse_format
+from .defaults import (
+    DEFAULT_FORMAT,
+    DEFAULT_OUTPUT_TEMPLATE,
+    DEFAULT_REPLACEMENT_CHAR,
+    DEFAULT_BAD_CHARS,
+    DEFAULT_TRACKLIST_FORMAT,
+    DEFAULT_ALBUM,
+    DEFAULT_COMMENT,
+    DEFAULT_COMMENT_STREAM,
+    DEFAULT_COMMENT_SEPARATOR,
+    DEFAULT_NO_COMMENT,
+    DEFAULT_MERGE_COMMENTS,
+    DEFAULT_DROP_VIDEO,
+    DEFAULT_DROP_SUBS,
+    DEFAULT_NUMBER_TRACKS,
+    DEFAULT_REPLACE_BAD_CHARS,
+    DEFAULT_SKIP_EXISTING,
+    DEFAULT_DELETE_ORIGINAL,
+    DEFAULT_TRANSCODE_TO,
+)
 from .core import split_audio
-
+from .tracklist import read_tracklist, parse_format
 
 def main():
-    """Parse arguments and start the splitting process."""
-    parser = argparse.ArgumentParser(
-        description="Split an audio file into tracks using a tracklist.",
-        epilog="Tracklist format: mm:ss track_name - author_name"
-    )
-
-    # Positional arguments.
-    parser.add_argument('input_file', help='Input audio/video file')
+    parser = argparse.ArgumentParser(description="Split audio file using a tracklist.")
+    parser.add_argument('input_file', help='Input audio file')
     parser.add_argument('tracklist_file', help='Tracklist file')
 
-    # Optional arguments.
-    parser.add_argument(
-        '--output-dir', '-o',
-        help='Output directory for split tracks (default: <input_basename>_splits)'
-    )
-    parser.add_argument(
-        '--format',
-        help='Output container format (e.g., mp3, m4a, mkv, mp4, ogg, opus)'
-    )
-    parser.add_argument(
-        '--transcode-to',
-        help='Re-encode audio to this codec (e.g., libmp3lame, aac, libopus)'
-    )
-    parser.add_argument(
-        '--drop-video',
-        action='store_true',
-        help='Remove video streams from output'
-    )
-    parser.add_argument(
-        '--drop-subs',
-        action='store_true',
-        help='Remove subtitle streams from output'
-    )
-    parser.add_argument(
-        '--number-tracks',
-        action='store_true',
-        help='Prepend track number to output filenames (convenience; use %%num in template for full control)'
-    )
-    parser.add_argument(
-        '--replace-bad-chars',
-        action='store_true',
-        help='Replace problematic characters in filenames (default: off)'
-    )
-    parser.add_argument(
-        '--replacement-char',
-        default='_',
-        help='Character used as replacement (default: "_")'
-    )
-    parser.add_argument(
-        '--bad-chars',
-        default=DEFAULT_BAD_CHARS,
-        help='String of characters to replace (default includes space and single quote)'
-    )
-    parser.add_argument(
-        '--skip-existing',
-        action='store_true',
-        help='Skip extraction if output file already exists (default: overwrite)'
-    )
-    parser.add_argument(
-        '--tracklist-format',
-        default='%ts %tn - %an',
-        help='Format of each line in the tracklist using placeholders: '
-             '%%ts (timestamp), %%tn (track name), %%an (author), %%al (album), '
-             '%%date (date/year), %%ext (file extension). '
-             'Default: "%%ts %%tn - %%an"'
-    )
-    parser.add_argument(
-        '--output-template',
-        default='%an-%tn.%ext',
-        help='Template for output filenames using placeholders: '
-             '%%tn (track name), %%an (author), %%al (album), '
-             '%%date (date/year), %%ext (file extension), %%num (track number). '
-             'Default: "%%an-%%tn.%%ext"'
-    )
-    parser.add_argument(
-        '--dry-run',
-        action='store_true',
-        help='Parse and display the tracklist without splitting any files'
-    )
+    # Output options
+    parser.add_argument('--format', default=DEFAULT_FORMAT, help=f"Output container format (default: {DEFAULT_FORMAT})")
+    parser.add_argument('--transcode-to', default=DEFAULT_TRANSCODE_TO, help="Audio codec to transcode to (default: copy)")
+    parser.add_argument('--drop-video', action='store_true', default=DEFAULT_DROP_VIDEO, help="Drop video streams")
+    parser.add_argument('--drop-subs', action='store_true', default=DEFAULT_DROP_SUBS, help="Drop subtitle streams")
 
-    # Metadata options.
-    parser.add_argument(
-        '--album',
-        help='Set album name in output metadata (overrides parsed %%al and original album)'
-    )
-    parser.add_argument(
-        '--comment',
-        help='Explicit comment text (overrides all other comment settings)'
-    )
-    parser.add_argument(
-        '--no-comment',
-        action='store_true',
-        help='Explicitly ignore any comment (no comment written)'
-    )
-    parser.add_argument(
-        '--comment-stream',
-        type=int,
-        default=None,
-        help='Select comment from a specific stream index (0‑based). Default: first stream with a comment.'
-    )
-    parser.add_argument(
-        '--merge-comments',
-        action='store_true',
-        help='Merge all comments from all streams into one (separated by --comment-separator)'
-    )
-    parser.add_argument(
-        '--comment-separator',
-        default='; ',
-        help='Separator used when merging comments (default: "; ")'
-    )
+    # Filename options
+    parser.add_argument('--number-tracks', action='store_true', default=DEFAULT_NUMBER_TRACKS, help="Prepend track numbers")
+    parser.add_argument('--output-template', default=DEFAULT_OUTPUT_TEMPLATE, help=f"Output filename template (default: {DEFAULT_OUTPUT_TEMPLATE})")
+    parser.add_argument('--replace-bad-chars', action='store_true', default=DEFAULT_REPLACE_BAD_CHARS, help="Replace bad characters")
+    parser.add_argument('--replacement-char', default=DEFAULT_REPLACEMENT_CHAR, help=f"Replacement character (default: {DEFAULT_REPLACEMENT_CHAR})")
+    parser.add_argument('--bad-chars', default=DEFAULT_BAD_CHARS, help=f"Bad characters to replace (default: {DEFAULT_BAD_CHARS})")
+    parser.add_argument('--skip-existing', action='store_true', default=DEFAULT_SKIP_EXISTING, help="Skip existing output files")
 
-    # NEW: Delete original after successful split.
-    parser.add_argument(
-        '--delete-original',
-        action='store_true',
-        help='Delete the original input file after successful splitting (default: keep)'
-    )
+    # Metadata options
+    parser.add_argument('--album', default=DEFAULT_ALBUM, help="Album name")
+    parser.add_argument('--comment', default=DEFAULT_COMMENT, help="Comment")
+    parser.add_argument('--no-comment', action='store_true', default=DEFAULT_NO_COMMENT, help="Ignore comment")
+    parser.add_argument('--comment-stream', type=int, default=DEFAULT_COMMENT_STREAM, help="Comment stream index")
+    parser.add_argument('--merge-comments', action='store_true', default=DEFAULT_MERGE_COMMENTS, help="Merge all comments")
+    parser.add_argument('--comment-separator', default=DEFAULT_COMMENT_SEPARATOR, help=f"Separator for merged comments (default: {DEFAULT_COMMENT_SEPARATOR})")
+
+    # Tracklist format
+    parser.add_argument('--tracklist-format', default=DEFAULT_TRACKLIST_FORMAT, help=f"Tracklist format (default: {DEFAULT_TRACKLIST_FORMAT})")
+
+    # Other
+    parser.add_argument('--delete-original', action='store_true', default=DEFAULT_DELETE_ORIGINAL, help="Delete original file after split")
+    parser.add_argument('--dry-run', action='store_true', help="Parse and display tracklist without splitting")
 
     args = parser.parse_args()
 
diff --git a/docker-compose.override.yaml b/docker-compose.override.yaml
deleted file mode 100644
index 4c9b1fa..0000000
--- a/docker-compose.override.yaml
+++ /dev/null
@@ -1,37 +0,0 @@
-services:
-  backend:
-    build:
-      context: .
-      dockerfile: web/backend/Dockerfile
-    volumes:
-      # Bind mount for source code (hot-reload for Python)
-      - ./web/backend:/app/backend
-      - ./audio_splitter:/app/audio_splitter
-      - ./setup.py:/app/setup.py
-      - ./pyproject.toml:/app/pyproject.toml
-      # Development data directory (overrides production)
-      - "./dev_data:/tmp/audio_splitter_web"
-    environment:
-      - DEBUG=1
-      - PYTHONUNBUFFERED=1
-    ports:
-      - "8000:8000"
-
-  frontend:
-    build:
-      context: ./web/frontend
-       # Use the same Dockerfile, but override CMD for development
-      dockerfile: Dockerfile
-    command: ["npm", "run", "dev", "--", "--host", "0.0.0.0"]
-    volumes:
-      # Bind mount for source code (hot-reload for Vite)
-      - ./web/frontend:/app
-      - node_modules:/app/node_modules
-    environment:
-      - BACKEND_URL=http://backend:8000
-      - VITE_BACKEND_URL=http://backend:8000
-    ports:
-      - "5173:5173"
-
-volumes:
-  node_modules:
diff --git a/docker-compose.yaml b/docker-compose.yaml
index 48151a8..7963630 100644
--- a/docker-compose.yaml
+++ b/docker-compose.yaml
@@ -1,19 +1,24 @@
 services:
   backend:
-    image: git.vmn.su/max/audio_splitter_backend:latest
+    build:
+      context: .
+      dockerfile: web/backend/Dockerfile
+      #image: max/audio_splitter_backend:latest
     ports:
       - "${BACKEND_PORT:-8000}:8000"
     volumes:
-      # Bind mount for persistent data storage.
-      # Set BACKEND_DATA_DIR in .env to point to your data directory.
-      - "${BACKEND_DATA_DIR:-/var/lib/audio_splitter_data}:/tmp/audio_splitter_web"
+      #- "${BACKEND_DATA_DIR:-/var/lib/audio_splitter_data}:/tmp/audio_splitter_web"
+      - "/tmp/test:/tmp/audio_splitter_web"
     environment:
       - PYTHONUNBUFFERED=1
       - DEBUG=${DEBUG:-0}
     restart: unless-stopped
 
   frontend:
-    image: git.vmn.su/max/audio_splitter_frontend:latest
+    build:
+      context: .
+      dockerfile: web/frontend/Dockerfile
+    #image: max/audio_splitter_frontend:latest
     ports:
       - "${FRONTEND_PORT:-5173}:80"
     depends_on:
diff --git a/scripts/generate_ts_defaults.py b/scripts/generate_ts_defaults.py
new file mode 100644
index 0000000..9274610
--- /dev/null
+++ b/scripts/generate_ts_defaults.py
@@ -0,0 +1,79 @@
+#!/usr/bin/env python3
+"""
+Generate TypeScript constants from audio_splitter/defaults.py.
+"""
+
+import importlib.util
+import json
+import sys
+from pathlib import Path
+
+# Get the directory where this script is located
+SCRIPT_DIR = Path(__file__).parent.absolute()
+
+# The defaults.py is in the same directory as the script
+DEFAULTS_PATH = SCRIPT_DIR / "defaults.py"
+
+# The frontend source is at SCRIPT_DIR.parent (i.e., /app)
+# The generated file should be at /app/src/constants/generated.ts
+FRONTEND_ROOT = SCRIPT_DIR.parent
+OUTPUT_PATH = FRONTEND_ROOT / "src" / "constants" / "generated.ts"
+
+
+def load_defaults_module():
+    spec = importlib.util.spec_from_file_location("defaults", DEFAULTS_PATH)
+    if spec is None:
+        raise RuntimeError(f"Could not load spec for {DEFAULTS_PATH}")
+    module = importlib.util.module_from_spec(spec)
+    spec.loader.exec_module(module)
+    return module
+
+
+def format_value(value):
+    """Convert Python value to TypeScript literal."""
+    if value is None:
+        return "null"
+    if isinstance(value, bool):
+        return str(value).lower()
+    if isinstance(value, str):
+        # Use json.dumps to produce a properly escaped string literal
+        return json.dumps(value)
+    if isinstance(value, (int, float)):
+        return str(value)
+    if isinstance(value, list):
+        return f"[{', '.join(format_value(v) for v in value)}]"
+    return repr(value)
+
+
+def main():
+    print(f"Generating TypeScript defaults from {DEFAULTS_PATH}")
+    defaults = load_defaults_module()
+
+    constants = {name: value for name, value in vars(defaults).items() if name.startswith("DEFAULT_")}
+
+    if not constants:
+        print("No DEFAULT_* constants found.")
+        sys.exit(1)
+
+    lines = [
+        "// ============================================================================",
+        "// GENERATED FILE – DO NOT EDIT MANUALLY.",
+        "// This file is generated from audio_splitter/defaults.py.",
+        "// Run `npm run generate` or `python scripts/generate_ts_defaults.py` to update.",
+        "// ============================================================================",
+        "",
+    ]
+
+    for name, value in sorted(constants.items()):
+        ts_value = format_value(value)
+        lines.append(f"export const {name} = {ts_value};")
+
+    OUTPUT_PATH.parent.mkdir(parents=True, exist_ok=True)
+    OUTPUT_PATH.write_text("\n".join(lines) + "\n")
+
+    print(f"✅ Generated {OUTPUT_PATH}")
+    print(f"   {len(constants)} constants exported.")
+
+
+if __name__ == "__main__":
+    main()
diff --git a/web/backend/services/splitter.py b/web/backend/services/splitter.py
index 23be35b..6c9b501 100644
--- a/web/backend/services/splitter.py
+++ b/web/backend/services/splitter.py
@@ -2,10 +2,10 @@
 
 import os
 import sys
-import shutil
-from pathlib import Path
-from typing import List, Dict, Any
 import time
+from pathlib import Path
+from types import SimpleNamespace
+from typing import Dict, List, Any
 
 from backend.config import settings
 from backend.services.task_manager import task_manager
@@ -13,12 +13,31 @@ from backend.services.file_manager import FileManager
 from backend.models.request import TracklistEntry
 from backend.models.response import TaskStatus
 
+# Import central defaults
+from audio_splitter.defaults import (
+    DEFAULT_FORMAT,
+    DEFAULT_OUTPUT_TEMPLATE,
+    DEFAULT_REPLACEMENT_CHAR,
+    DEFAULT_BAD_CHARS,
+    DEFAULT_ALBUM,
+    DEFAULT_COMMENT,
+    DEFAULT_NO_COMMENT,
+    DEFAULT_COMMENT_STREAM,
+    DEFAULT_MERGE_COMMENTS,
+    DEFAULT_COMMENT_SEPARATOR,
+    DEFAULT_DROP_VIDEO,
+    DEFAULT_DROP_SUBS,
+    DEFAULT_NUMBER_TRACKS,
+    DEFAULT_REPLACE_BAD_CHARS,
+    DEFAULT_SKIP_EXISTING,
+    DEFAULT_DELETE_ORIGINAL,
+    DEFAULT_TRANSCODE_TO,
+)
+
 
 def run_split_task(task_id: str, tracklist: List[TracklistEntry], options: Dict[str, Any]) -> None:
     try:
-        task_manager.update_task_with_progress(
-            task_id, progress=5, message="Initializing..."
-        )
+        task_manager.update_task_with_progress(task_id, progress=5, message="Initializing...")
 
         input_path = FileManager.get_input_path(task_id)
         if not input_path or not input_path.exists():
@@ -26,6 +45,7 @@ def run_split_task(task_id: str, tracklist: List[TracklistEntry], options: Dict[
 
         output_dir = FileManager.ensure_output_dir(task_id)
 
+        # Convert tracklist to dicts (CLI format)
         tracks = []
         for entry in tracklist:
             track_dict = {
@@ -38,28 +58,25 @@ def run_split_task(task_id: str, tracklist: List[TracklistEntry], options: Dict[
             }
             tracks.append(track_dict)
 
-        from types import SimpleNamespace
-
-        # Build args namespace from options.
-        # IMPORTANT: format is None if not specified -> core will auto-detect.
+        # Build args namespace using defaults where options not provided
         args = SimpleNamespace(
-            format=options.get("format"),
-            transcode_to=options.get("transcode_to", None),
-            drop_video=options.get("drop_video", False),
-            drop_subs=options.get("drop_subs", False),
-            number_tracks=options.get("number_tracks", False),
-            replace_bad_chars=options.get("replace_bad_chars", False),
-            replacement_char=options.get("replacement_char", "_"),
-            bad_chars=options.get("bad_chars", r'!@#№$;:%^&?*(){}[]\/<>+=~`\' '),
-            skip_existing=options.get("skip_existing", False),
-            output_template=options.get("output_template", "%an-%tn.%ext"),
-            album=options.get("album", None),
-            comment=options.get("comment", None),
-            no_comment=options.get("no_comment", False),
-            comment_stream=options.get("comment_stream", None),
-            merge_comments=options.get("merge_comments", False),
-            comment_separator=options.get("comment_separator", "; "),
-            delete_original=False,
+            format=options.get("format", DEFAULT_FORMAT),
+            transcode_to=options.get("transcode_to", DEFAULT_TRANSCODE_TO),
+            drop_video=options.get("drop_video", DEFAULT_DROP_VIDEO),
+            drop_subs=options.get("drop_subs", DEFAULT_DROP_SUBS),
+            number_tracks=options.get("number_tracks", DEFAULT_NUMBER_TRACKS),
+            replace_bad_chars=options.get("replace_bad_chars", DEFAULT_REPLACE_BAD_CHARS),
+            replacement_char=options.get("replacement_char", DEFAULT_REPLACEMENT_CHAR),
+            bad_chars=options.get("bad_chars", DEFAULT_BAD_CHARS),
+            skip_existing=options.get("skip_existing", DEFAULT_SKIP_EXISTING),
+            output_template=options.get("output_template", DEFAULT_OUTPUT_TEMPLATE),
+            album=options.get("album", DEFAULT_ALBUM),
+            comment=options.get("comment", DEFAULT_COMMENT),
+            no_comment=options.get("no_comment", DEFAULT_NO_COMMENT),
+            comment_stream=options.get("comment_stream", DEFAULT_COMMENT_STREAM),
+            merge_comments=options.get("merge_comments", DEFAULT_MERGE_COMMENTS),
+            comment_separator=options.get("comment_separator", DEFAULT_COMMENT_SEPARATOR),
+            delete_original=DEFAULT_DELETE_ORIGINAL,  # never delete in web
         )
 
         project_root = Path(__file__).parent.parent.parent.parent
@@ -68,9 +85,7 @@ def run_split_task(task_id: str, tracklist: List[TracklistEntry], options: Dict[
 
         from audio_splitter.core import split_audio
 
-        task_manager.update_task_with_progress(
-            task_id, progress=10, message="Starting split..."
-        )
+        task_manager.update_task_with_progress(task_id, progress=10, message="Starting split...")
 
         split_audio(str(input_path), str(output_dir), tracks, args)
 
@@ -83,13 +98,11 @@ def run_split_task(task_id: str, tracklist: List[TracklistEntry], options: Dict[
             status=TaskStatus.DONE
         )
 
-        # Add tracks to the task state (for download and status queries)
         task_manager.update_task(
             task_id,
             tracks=output_files
         )
 
-        # Give WebSocket time to send the final message
         time.sleep(0.5)
 
     except Exception as e:
diff --git a/web/frontend/Dockerfile b/web/frontend/Dockerfile
index 3db19ff..5aab5dd 100644
--- a/web/frontend/Dockerfile
+++ b/web/frontend/Dockerfile
@@ -1,27 +1,42 @@
-# Stage 1: Build
+# web/frontend/Dockerfile
+# Build context must be the project root.
+
 FROM node:20-alpine AS builder
 
+# Install Python for the generation script
+RUN apk add --no-cache python3 py3-pip
+
 WORKDIR /app
 
-# Install dependencies
-COPY package.json package-lock.json* ./
+# Copy frontend package files and install dependencies
+COPY web/frontend/package.json web/frontend/package-lock.json* ./
 RUN npm install
 
-# Copy the application code and build
-COPY . .
+# Copy the frontend source code
+COPY web/frontend/ .
+
+# Copy the Python defaults and the generation script into the expected location
+# The generate script in package.json expects ../../scripts/generate_ts_defaults.py
+# So we must place it at /app/../../scripts/ which is /scripts/
+# But we can't COPY to a parent directory. Instead, we'll copy to /app/scripts/
+# and adjust the package.json script to use ./scripts/generate_ts_defaults.py
+# Actually, the simplest fix is to copy to /app/scripts/ and then adjust package.json.
+#
+# Let's use a different approach: copy to /app/scripts/ and update the generate script.
+COPY audio_splitter/defaults.py /app/scripts/defaults.py
+COPY scripts/generate_ts_defaults.py /app/scripts/generate_ts_defaults.py
+
+# Run the generation script
+RUN python /app/scripts/generate_ts_defaults.py
+
+# Build the frontend
 RUN npm run build
 
 # Stage 2: Production (nginx)
 FROM nginx:alpine
 
-# Copy built assets from builder
 COPY --from=builder /app/dist /usr/share/nginx/html
+COPY web/frontend/nginx/nginx.conf /etc/nginx/conf.d/default.conf
 
-# Copy nginx configuration
-COPY nginx/nginx.conf /etc/nginx/conf.d/default.conf
-
-# Expose the port
 EXPOSE 80
-
-# Start nginx
 CMD ["nginx", "-g", "daemon off;"]
diff --git a/web/frontend/package.json b/web/frontend/package.json
index d9877bc..c592d22 100644
--- a/web/frontend/package.json
+++ b/web/frontend/package.json
@@ -4,6 +4,9 @@
   "version": "0.1.0",
   "type": "module",
   "scripts": {
+    "generate": "python scripts/generate_ts_defaults.py",
+    "predev": "npm run generate",
+    "prebuild": "npm run generate",
     "dev": "vite",
     "build": "tsc && vite build",
     "lint": "eslint . --ext ts,tsx --report-unused-disable-directives --max-warnings 0",
@@ -33,4 +36,4 @@
     "typescript": "^5.2.2",
     "vite": "^5.0.8"
   }
-}
\ No newline at end of file
+}
diff --git a/web/frontend/src/stores/optionsStore.ts b/web/frontend/src/stores/optionsStore.ts
index 1d6ca29..ce2970b 100644
--- a/web/frontend/src/stores/optionsStore.ts
+++ b/web/frontend/src/stores/optionsStore.ts
@@ -1,24 +1,44 @@
+// web/frontend/src/stores/optionsStore.ts
 import { create } from 'zustand'
 import { SplitOptions } from '../types'
+import {
+  DEFAULT_FORMAT,
+  DEFAULT_OUTPUT_TEMPLATE,
+  DEFAULT_REPLACEMENT_CHAR,
+  DEFAULT_BAD_CHARS,
+  DEFAULT_ALBUM,
+  DEFAULT_COMMENT,
+  DEFAULT_NO_COMMENT,
+  DEFAULT_COMMENT_STREAM,
+  DEFAULT_MERGE_COMMENTS,
+  DEFAULT_COMMENT_SEPARATOR,
+  DEFAULT_DROP_VIDEO,
+  DEFAULT_DROP_SUBS,
+  DEFAULT_NUMBER_TRACKS,
+  DEFAULT_REPLACE_BAD_CHARS,
+  DEFAULT_SKIP_EXISTING,
+  DEFAULT_TRANSCODE_TO,
+  DEFAULT_TRACKLIST_FORMAT,
+} from '../constants/generated'
 
 const DEFAULT_OPTIONS: SplitOptions = {
-  format: 'mp3',
-  transcode_to: '',
-  drop_video: false,
-  drop_subs: false,
-  number_tracks: false,
-  replace_bad_chars: false,
-  replacement_char: '_',
-  bad_chars: '!@#№$;:%^&?*(){}[]\\/<>+=~`\' ',
-  skip_existing: false,
-  output_template: '%an-%tn.%ext',
-  album: '',
-  comment: '',
-  no_comment: false,
-  comment_stream: null,
-  merge_comments: false,
-  comment_separator: '; ',
-  tracklist_format: '%ts %tn - %an', // NEW
+  format: DEFAULT_FORMAT,
+  transcode_to: DEFAULT_TRANSCODE_TO ?? '',
+  drop_video: DEFAULT_DROP_VIDEO,
+  drop_subs: DEFAULT_DROP_SUBS,
+  number_tracks: DEFAULT_NUMBER_TRACKS,
+  replace_bad_chars: DEFAULT_REPLACE_BAD_CHARS,
+  replacement_char: DEFAULT_REPLACEMENT_CHAR,
+  bad_chars: DEFAULT_BAD_CHARS,
+  skip_existing: DEFAULT_SKIP_EXISTING,
+  output_template: DEFAULT_OUTPUT_TEMPLATE,
+  album: DEFAULT_ALBUM ?? '',
+  comment: DEFAULT_COMMENT ?? '',
+  no_comment: DEFAULT_NO_COMMENT,
+  comment_stream: DEFAULT_COMMENT_STREAM,
+  merge_comments: DEFAULT_MERGE_COMMENTS,
+  comment_separator: DEFAULT_COMMENT_SEPARATOR,
+  tracklist_format: DEFAULT_TRACKLIST_FORMAT,
 }
 
 interface OptionsState {