diff --git a/src/main/events/index.ts b/src/main/events/index.ts
index 89dd01f5..834f47ba 100644
--- a/src/main/events/index.ts
+++ b/src/main/events/index.ts
@@ -95,6 +95,7 @@ import "./themes/toggle-custom-theme";
 import "./themes/copy-theme-achievement-sound";
 import "./themes/remove-theme-achievement-sound";
 import "./themes/get-theme-sound-path";
+import "./themes/get-theme-sound-data-url";
 import "./themes/import-theme-sound-from-store";
 import "./download-sources/remove-download-source";
 import "./download-sources/get-download-sources";
diff --git a/src/main/events/themes/get-theme-sound-data-url.ts b/src/main/events/themes/get-theme-sound-data-url.ts
new file mode 100644
index 00000000..b9ace306
--- /dev/null
+++ b/src/main/events/themes/get-theme-sound-data-url.ts
@@ -0,0 +1,38 @@
+import { registerEvent } from "../register-event";
+import { getThemeSoundPath } from "@main/helpers";
+import fs from "node:fs";
+import path from "node:path";
+import { logger } from "@main/services";
+
+const getThemeSoundDataUrl = async (
+  _event: Electron.IpcMainInvokeEvent,
+  themeId: string
+): Promise<string | null> => {
+  try {
+    const soundPath = getThemeSoundPath(themeId);
+
+    if (!soundPath || !fs.existsSync(soundPath)) {
+      return null;
+    }
+
+    const buffer = await fs.promises.readFile(soundPath);
+    const ext = path.extname(soundPath).toLowerCase().slice(1);
+
+    const mimeTypes: Record<string, string> = {
+      mp3: "audio/mpeg",
+      wav: "audio/wav",
+      ogg: "audio/ogg",
+      m4a: "audio/mp4",
+    };
+
+    const mimeType = mimeTypes[ext] || "audio/mpeg";
+    const base64 = buffer.toString("base64");
+
+    return `data:${mimeType};base64,${base64}`;
+  } catch (error) {
+    logger.error("Failed to get theme sound data URL", error);
+    return null;
+  }
+};
+
+registerEvent("getThemeSoundDataUrl", getThemeSoundDataUrl);
diff --git a/src/preload/index.ts b/src/preload/index.ts
index 951591a5..bfb1de6e 100644
--- a/src/preload/index.ts
+++ b/src/preload/index.ts
@@ -577,6 +577,8 @@ contextBridge.exposeInMainWorld("electron", {
     ipcRenderer.invoke("removeThemeAchievementSound", themeId),
   getThemeSoundPath: (themeId: string) =>
     ipcRenderer.invoke("getThemeSoundPath", themeId),
+  getThemeSoundDataUrl: (themeId: string) =>
+    ipcRenderer.invoke("getThemeSoundDataUrl", themeId),
   importThemeSoundFromStore: (
     themeId: string,
     themeName: string,
diff --git a/src/renderer/src/declaration.d.ts b/src/renderer/src/declaration.d.ts
index 44696872..9eefb477 100644
--- a/src/renderer/src/declaration.d.ts
+++ b/src/renderer/src/declaration.d.ts
@@ -416,6 +416,7 @@ declare global {
     ) => Promise<void>;
     removeThemeAchievementSound: (themeId: string) => Promise<void>;
     getThemeSoundPath: (themeId: string) => Promise<string | null>;
+    getThemeSoundDataUrl: (themeId: string) => Promise<string | null>;
     importThemeSoundFromStore: (
       themeId: string,
       themeName: string,
diff --git a/src/renderer/src/helpers.ts b/src/renderer/src/helpers.ts
index d5326de0..e16aa7a4 100644
--- a/src/renderer/src/helpers.ts
+++ b/src/renderer/src/helpers.ts
@@ -130,9 +130,11 @@ export const getAchievementSoundUrl = async (): Promise<string> => {
     const activeTheme = await window.electron.getActiveCustomTheme();
 
     if (activeTheme?.hasCustomSound) {
-      const soundPath = await window.electron.getThemeSoundPath(activeTheme.id);
-      if (soundPath) {
-        return `file://${soundPath}`;
+      const soundDataUrl = await window.electron.getThemeSoundDataUrl(
+        activeTheme.id
+      );
+      if (soundDataUrl) {
+        return soundDataUrl;
       }
     }
   } catch (error) {
diff --git a/src/renderer/src/pages/theme-editor/theme-editor.scss b/src/renderer/src/pages/theme-editor/theme-editor.scss
index b34217f9..2d3d9067 100644
--- a/src/renderer/src/pages/theme-editor/theme-editor.scss
+++ b/src/renderer/src/pages/theme-editor/theme-editor.scss
@@ -47,6 +47,8 @@
     position: relative;
     border: 1px solid globals.$muted-color;
     border-radius: 2px;
+    flex: 1;
+    min-width: 0;
   }
 
   &__footer {
@@ -80,7 +82,7 @@
   }
 
   &__info {
-    padding: 16px;
+    padding: 8px;
 
     p {
       font-size: 16px;
@@ -93,25 +95,39 @@
   &__notification-preview {
     padding-top: 12px;
     display: flex;
-    flex-direction: column;
+    flex-direction: row;
     gap: 16px;
+    align-items: flex-start;
 
     &__select-variation {
       flex: inherit;
     }
   }
 
+  &__notification-preview-controls {
+    display: flex;
+    flex-direction: column;
+    gap: 16px;
+    flex-shrink: 0;
+  }
+
   &__notification-controls {
     display: flex;
     flex-direction: row;
     align-items: center;
-    gap: 16px;
+    gap: 8px;
   }
 
   &__sound-controls {
     display: flex;
-    flex-direction: row;
+    flex-direction: column;
     gap: 8px;
-    flex-wrap: wrap;
+    width: fit-content;
+
+    button,
+    .button {
+      width: auto;
+      align-self: flex-start;
+    }
   }
 }
diff --git a/src/renderer/src/pages/theme-editor/theme-editor.tsx b/src/renderer/src/pages/theme-editor/theme-editor.tsx
index 6057084f..75df5e1e 100644
--- a/src/renderer/src/pages/theme-editor/theme-editor.tsx
+++ b/src/renderer/src/pages/theme-editor/theme-editor.tsx
@@ -213,57 +213,59 @@ export default function ThemeEditor() {
       <div className="theme-editor__footer">
         <CollapsedMenu title={t("notification_preview")}>
           <div className="theme-editor__notification-preview">
-            <div className="theme-editor__notification-controls">
-              <SelectField
-                className="theme-editor__notification-preview__select-variation"
-                label={t("variation")}
-                options={Object.values(notificationVariations).map(
-                  (variation) => {
-                    return {
-                      key: variation,
-                      value: variation,
-                      label: t(variation),
-                    };
+            <div className="theme-editor__notification-preview-controls">
+              <div className="theme-editor__notification-controls">
+                <SelectField
+                  className="theme-editor__notification-preview__select-variation"
+                  label={t("variation")}
+                  options={Object.values(notificationVariations).map(
+                    (variation) => {
+                      return {
+                        key: variation,
+                        value: variation,
+                        label: t(variation),
+                      };
+                    }
+                  )}
+                  onChange={(value) =>
+                    setNotificationVariation(
+                      value.target.value as keyof typeof notificationVariations
+                    )
                   }
-                )}
-                onChange={(value) =>
-                  setNotificationVariation(
-                    value.target.value as keyof typeof notificationVariations
-                  )
-                }
-              />
+                />
 
-              <SelectField
-                label={t("alignment")}
-                value={notificationAlignment}
-                onChange={(e) =>
-                  setNotificationAlignment(
-                    e.target.value as AchievementCustomNotificationPosition
-                  )
-                }
-                options={achievementCustomNotificationPositionOptions}
-              />
-            </div>
+                <SelectField
+                  label={t("alignment")}
+                  value={notificationAlignment}
+                  onChange={(e) =>
+                    setNotificationAlignment(
+                      e.target.value as AchievementCustomNotificationPosition
+                    )
+                  }
+                  options={achievementCustomNotificationPositionOptions}
+                />
+              </div>
 
-            <div className="theme-editor__sound-controls">
-              <Button theme="outline" onClick={handleSelectSound}>
-                <UploadIcon />
-                {theme?.hasCustomSound
-                  ? t("change_achievement_sound")
-                  : t("select_achievement_sound")}
-              </Button>
-
-              {theme?.hasCustomSound && (
-                <Button theme="outline" onClick={handleRemoveSound}>
-                  <TrashIcon />
-                  {t("remove_achievement_sound")}
+              <div className="theme-editor__sound-controls">
+                <Button theme="outline" onClick={handleSelectSound}>
+                  <UploadIcon />
+                  {theme?.hasCustomSound
+                    ? t("change_achievement_sound")
+                    : t("select_achievement_sound")}
                 </Button>
-              )}
 
-              <Button theme="outline" onClick={handlePreviewSound}>
-                <PlayIcon />
-                {t("preview_sound")}
-              </Button>
+                {theme?.hasCustomSound && (
+                  <Button theme="outline" onClick={handleRemoveSound}>
+                    <TrashIcon />
+                    {t("remove_achievement_sound")}
+                  </Button>
+                )}
+
+                <Button theme="outline" onClick={handlePreviewSound}>
+                  <PlayIcon />
+                  {t("preview_sound")}
+                </Button>
+              </div>
             </div>
 
             <div className="theme-editor__notification-preview-wrapper">