diff --git a/src/main/services/MeetingModeService.ts b/src/main/services/MeetingModeService.ts
index 1848ac1..19b5483 100644
--- a/src/main/services/MeetingModeService.ts
+++ b/src/main/services/MeetingModeService.ts
@@ -8,7 +8,7 @@ import fs from 'fs'
 import { nanoid } from 'nanoid'
 import { eq, desc, sql } from 'drizzle-orm'
 import { getLogger } from './LoggerService'
-import { configGet } from './ConfigService'
+import { configGet, configSet } from './ConfigService'
 import { getMainWindow } from '../windows/WindowManager'
 import { getDatabase } from '../db'
 import { meetingSessions, meetingMemos } from '../db/schema'
@@ -151,18 +151,26 @@ class MeetingModeService extends EventEmitter {
     }
     captionService.on('segment', this._segmentHandler)
 
-    // 회의 모드는 마이크 캡처 강제 (시스템 오디오가 아닌 마이크)
-    const prevAudioSource = captionService.getConfig().audioSource
-    captionService.setConfig({ audioSource: 'mic' })
+    // 회의 모드는 마이크 캡처 강제 — ConfigService 값도 임시 변경
+    // (CaptionService.start()가 ConfigService에서 다시 읽기 때문)
+    type AppConfigKey = keyof import('@shared/types').AppConfig
+    const prevAudioSource = configGet('captionAudioSource' as AppConfigKey) as unknown as string
+    configSet('captionAudioSource' as AppConfigKey, 'mic' as never)
 
     try {
       await captionService.start()
       // 회의 모드 UI가 자체 자막 패널에 표시하므로 오버레이 숨김
       const { hideCaptionOverlay } = await import('../windows/WindowManager')
       hideCaptionOverlay()
+      // ConfigService 원래 값 복원
+      if (prevAudioSource) {
+        configSet('captionAudioSource' as AppConfigKey, prevAudioSource as never)
+      }
     } catch (err) {
-      // 오디오 소스 복원
-      captionService.setConfig({ audioSource: prevAudioSource })
+      // ConfigService 원래 값 복원
+      if (prevAudioSource) {
+        configSet('captionAudioSource' as AppConfigKey, prevAudioSource as never)
+      }
       // 시작 실패 시 복원
       captionService.off('segment', this._segmentHandler)
       this._segmentHandler = null