diff --git a/frontend/src/components/TranscriptEditor.tsx b/frontend/src/components/TranscriptEditor.tsx
index 5113c43..8906ae2 100644
--- a/frontend/src/components/TranscriptEditor.tsx
+++ b/frontend/src/components/TranscriptEditor.tsx
@@ -1,7 +1,7 @@
 import { useCallback, useRef, useEffect, useMemo, useState } from 'react';
 import { useEditorStore } from '../store/editorStore';
 import { Virtuoso } from 'react-virtuoso';
-import { Trash2, RotateCcw } from 'lucide-react';
+import { Scissors, VolumeX, SlidersHorizontal, RotateCcw } from 'lucide-react';
 
 export default function TranscriptEditor() {
   const words = useEditorStore((s) => s.words);
@@ -9,6 +9,7 @@ export default function TranscriptEditor() {
   const deletedRanges = useEditorStore((s) => s.deletedRanges);
   const cutRanges = useEditorStore((s) => s.cutRanges);
   const muteRanges = useEditorStore((s) => s.muteRanges);
+  const gainRanges = useEditorStore((s) => s.gainRanges);
   const selectedWordIndices = useEditorStore((s) => s.selectedWordIndices);
   const hoveredWordIndex = useEditorStore((s) => s.hoveredWordIndex);
   const setSelectedWordIndices = useEditorStore((s) => s.setSelectedWordIndices);
@@ -16,7 +17,10 @@ export default function TranscriptEditor() {
   const restoreRange = useEditorStore((s) => s.restoreRange);
   const removeCutRange = useEditorStore((s) => s.removeCutRange);
   const removeMuteRange = useEditorStore((s) => s.removeMuteRange);
+  const removeGainRange = useEditorStore((s) => s.removeGainRange);
   const addCutRange = useEditorStore((s) => s.addCutRange);
+  const addMuteRange = useEditorStore((s) => s.addMuteRange);
+  const addGainRange = useEditorStore((s) => s.addGainRange);
   const getWordAtTime = useEditorStore((s) => s.getWordAtTime);
 
   const selectionStart = useRef<number | null>(null);
@@ -131,6 +135,22 @@ export default function TranscriptEditor() {
     addCutRange(startTime, endTime);
   }, [selectedWordIndices, words, addCutRange]);
 
+  const muteSelectedWords = useCallback(() => {
+    if (selectedWordIndices.length === 0) return;
+    const sorted = [...selectedWordIndices].sort((a, b) => a - b);
+    const startTime = words[sorted[0]].start;
+    const endTime = words[sorted[sorted.length - 1]].end;
+    addMuteRange(startTime, endTime);
+  }, [selectedWordIndices, words, addMuteRange]);
+
+  const gainSelectedWords = useCallback(() => {
+    if (selectedWordIndices.length === 0) return;
+    const sorted = [...selectedWordIndices].sort((a, b) => a - b);
+    const startTime = words[sorted[0]].start;
+    const endTime = words[sorted[sorted.length - 1]].end;
+    addGainRange(startTime, endTime, 3);
+  }, [selectedWordIndices, words, addGainRange]);
+
   const getCutRangeForWord = useCallback(
     (wordIndex: number) => {
       const word = words[wordIndex];
@@ -149,6 +169,15 @@ export default function TranscriptEditor() {
     [words, muteRanges],
   );
 
+  const getGainRangeForWord = useCallback(
+    (wordIndex: number) => {
+      const word = words[wordIndex];
+      if (!word) return null;
+      return gainRanges.find((r) => word.start >= r.start && word.end <= r.end);
+    },
+    [words, gainRanges],
+  );
+
   const renderSegment = useCallback(
     (index: number) => {
       const segment = segments[index];
@@ -170,6 +199,7 @@ export default function TranscriptEditor() {
               const deletedRange = isDeleted ? getRangeForWord(globalIndex) : null;
               const cutRange = getCutRangeForWord(globalIndex);
               const muteRange = getMuteRangeForWord(globalIndex);
+              const gainRange = getGainRangeForWord(globalIndex);
 
               return (
                 <span
@@ -185,9 +215,10 @@ export default function TranscriptEditor() {
                     ${isDeleted ? 'line-through text-editor-text-muted/40 bg-editor-word-deleted' : ''}
                     ${cutRange ? 'bg-red-500/20 text-red-100' : ''}
                     ${muteRange ? 'bg-blue-500/20 text-blue-100' : ''}
-                    ${isSelected && !isDeleted && !cutRange && !muteRange ? 'bg-editor-word-selected text-white' : ''}
-                    ${isActive && !isDeleted && !isSelected && !cutRange && !muteRange ? 'bg-editor-accent/20 text-editor-accent' : ''}
-                    ${isHovered && !isDeleted && !isSelected && !isActive && !cutRange && !muteRange ? 'bg-editor-word-hover' : ''}
+                    ${gainRange ? 'bg-amber-500/20 text-amber-100' : ''}
+                    ${isSelected && !isDeleted && !cutRange && !muteRange && !gainRange ? 'bg-editor-word-selected text-white' : ''}
+                    ${isActive && !isDeleted && !isSelected && !cutRange && !muteRange && !gainRange ? 'bg-editor-accent/20 text-editor-accent' : ''}
+                    ${isHovered && !isDeleted && !isSelected && !isActive && !cutRange && !muteRange && !gainRange ? 'bg-editor-word-hover' : ''}
                   `}
                 >
                   {word.word}{' '}
@@ -202,12 +233,13 @@ export default function TranscriptEditor() {
                       <RotateCcw className="w-2.5 h-2.5" /> Restore
                     </button>
                   )}
-                  {(cutRange || muteRange) && isHovered && (
+                  {(cutRange || muteRange || gainRange) && isHovered && (
                     <button
                       onClick={(e) => {
                         e.stopPropagation();
                         if (cutRange) removeCutRange(cutRange.id);
                         if (muteRange) removeMuteRange(muteRange.id);
+                        if (gainRange) removeGainRange(gainRange.id);
                       }}
                       className="absolute -top-5 left-1/2 -translate-x-1/2 flex items-center gap-0.5 px-1.5 py-0.5 bg-editor-surface border border-editor-border rounded text-[10px] text-editor-success whitespace-nowrap z-10"
                     >
@@ -221,23 +253,39 @@ export default function TranscriptEditor() {
         </div>
       );
     },
-    [segments, deletedSet, selectedSet, activeWordIndex, hoveredWordIndex, handleWordMouseDown, handleWordMouseEnter, setHoveredWordIndex, getRangeForWord, getCutRangeForWord, getMuteRangeForWord, restoreRange, removeCutRange, removeMuteRange],
+    [segments, deletedSet, selectedSet, activeWordIndex, hoveredWordIndex, handleWordMouseDown, handleWordMouseEnter, setHoveredWordIndex, getRangeForWord, getCutRangeForWord, getMuteRangeForWord, getGainRangeForWord, restoreRange, removeCutRange, removeMuteRange, removeGainRange],
   );
 
   return (
     <div className="flex-1 flex flex-col min-h-0">
       <div className="flex items-center gap-2 px-4 py-2 border-b border-editor-border shrink-0">
         <span className="text-xs text-editor-text-muted flex-1">
-          {words.length} words &middot; {deletedRanges.length} cuts &middot; {cutRanges.length} cut ranges &middot; {muteRanges.length} mute ranges
+          {words.length} words &middot; {deletedRanges.length} cuts &middot; {cutRanges.length} cut ranges &middot; {muteRanges.length} mute ranges &middot; {gainRanges.length} gain ranges
         </span>
         {selectedWordIndices.length > 0 && (
-          <button
-            onClick={cutSelectedWords}
-            className="flex items-center gap-1 px-2 py-1 text-xs bg-editor-danger/20 text-editor-danger rounded hover:bg-editor-danger/30 transition-colors"
-          >
-            <Trash2 className="w-3 h-3" />
-            Cut {selectedWordIndices.length} words
-          </button>
+          <div className="flex items-center gap-1">
+            <button
+              onClick={cutSelectedWords}
+              className="flex items-center gap-1 px-2 py-1 text-xs bg-red-500/20 text-red-300 rounded hover:bg-red-500/30 transition-colors"
+            >
+              <Scissors className="w-3 h-3" />
+              Cut
+            </button>
+            <button
+              onClick={muteSelectedWords}
+              className="flex items-center gap-1 px-2 py-1 text-xs bg-blue-500/20 text-blue-300 rounded hover:bg-blue-500/30 transition-colors"
+            >
+              <VolumeX className="w-3 h-3" />
+              Mute
+            </button>
+            <button
+              onClick={gainSelectedWords}
+              className="flex items-center gap-1 px-2 py-1 text-xs bg-amber-500/20 text-amber-300 rounded hover:bg-amber-500/30 transition-colors"
+            >
+              <SlidersHorizontal className="w-3 h-3" />
+              Gain (+3 dB)
+            </button>
+          </div>
         )}
       </div>
 
diff --git a/frontend/src/lib/tauri-bridge.ts b/frontend/src/lib/tauri-bridge.ts
index 8300b6d..f5c5639 100644
--- a/frontend/src/lib/tauri-bridge.ts
+++ b/frontend/src/lib/tauri-bridge.ts
@@ -42,15 +42,21 @@ window.electronAPI = {
   },
 
   openProject: async (): Promise<string | null> => {
+    const projectDir = await invoke<string>('get_projects_directory');
     const result = await open({
       multiple: false,
+      defaultPath: projectDir,
       filters: PROJECT_FILTERS,
     });
     return typeof result === 'string' ? result : null;
   },
 
   saveProject: async (): Promise<string | null> => {
-    const result = await save({ filters: PROJECT_FILTERS });
+    const projectDir = await invoke<string>('get_projects_directory');
+    const result = await save({
+      defaultPath: `${projectDir}/project.aive`,
+      filters: PROJECT_FILTERS,
+    });
     return result ?? null;
   },
 
diff --git a/src-tauri/src/lib.rs b/src-tauri/src/lib.rs
index 537e0e2..deabfe0 100644
--- a/src-tauri/src/lib.rs
+++ b/src-tauri/src/lib.rs
@@ -9,6 +9,14 @@ mod ai_provider;
 mod caption_generator;
 mod background_removal;
 
+#[tauri::command]
+fn get_projects_directory() -> Result<String, String> {
+    let dir = paths::project_root().join("Projects");
+    std::fs::create_dir_all(&dir)
+        .map_err(|e| format!("Failed to create Projects directory: {e}"))?;
+    Ok(dir.to_string_lossy().to_string())
+}
+
 /// Returns the backend URL.
 #[tauri::command]
 fn get_backend_url() -> String {
@@ -234,6 +242,7 @@ pub fn run() {
             Ok(())
         })
         .invoke_handler(tauri::generate_handler![
+            get_projects_directory,
             get_backend_url,
             encrypt_string,
             decrypt_string,