diff --git a/src/app/api/tts/segments/audio/fallback/route.ts b/src/app/api/tts/segments/audio/fallback/route.ts
index aa62567..d658546 100644
--- a/src/app/api/tts/segments/audio/fallback/route.ts
+++ b/src/app/api/tts/segments/audio/fallback/route.ts
@@ -22,7 +22,7 @@ export async function GET(request: NextRequest) {
       return new NextResponse(null, {
         status: 416,
         headers: {
-          ...buildSegmentAudioCacheHeaders('fallback'),
+          ...buildSegmentAudioCacheHeaders(),
           'Accept-Ranges': 'bytes',
         },
       });
@@ -31,7 +31,7 @@ export async function GET(request: NextRequest) {
     const audio = await getTtsSegmentAudioObjectStream(resolved.audioKey, range ? { range } : undefined);
     const headers: Record<string, string> = {
       'Content-Type': audio.contentType || 'audio/mpeg',
-      ...buildSegmentAudioCacheHeaders('fallback'),
+      ...buildSegmentAudioCacheHeaders(),
       'Accept-Ranges': audio.acceptRanges || 'bytes',
     };
     if (audio.contentLength !== null) headers['Content-Length'] = String(audio.contentLength);
diff --git a/src/app/api/tts/segments/audio/presign/route.ts b/src/app/api/tts/segments/audio/presign/route.ts
deleted file mode 100644
index 746b204..0000000
--- a/src/app/api/tts/segments/audio/presign/route.ts
+++ /dev/null
@@ -1,40 +0,0 @@
-import { NextRequest, NextResponse } from 'next/server';
-import { isS3Configured } from '@/lib/server/storage/s3';
-import {
-  buildSegmentAudioCacheHeaders,
-  resolveCompletedSegmentAudio,
-  ttsSegmentsS3NotConfiguredResponse,
-} from '@/lib/server/tts/segments-audio';
-import { presignTtsSegmentAudioGet } from '@/lib/server/tts/segments-blobstore';
-
-export const dynamic = 'force-dynamic';
-
-export async function GET(request: NextRequest) {
-  try {
-    if (!isS3Configured()) return ttsSegmentsS3NotConfiguredResponse();
-
-    const resolved = await resolveCompletedSegmentAudio(request);
-    if (resolved instanceof Response) return resolved;
-
-    const fallbackUrl = `/api/tts/segments/audio/fallback?documentId=${encodeURIComponent(resolved.documentId)}&segmentId=${encodeURIComponent(resolved.segmentId)}`;
-    const directUrl = await presignTtsSegmentAudioGet(resolved.audioKey).catch(() => null);
-    if (!directUrl) {
-      console.warn('[blob-fallback] presign segment audio unavailable, redirecting to proxy fallback', {
-        documentId: resolved.documentId,
-        segmentId: resolved.segmentId,
-      });
-      return NextResponse.redirect(fallbackUrl, {
-        status: 307,
-        headers: buildSegmentAudioCacheHeaders('redirect'),
-      });
-    }
-
-    return NextResponse.redirect(directUrl, {
-      status: 307,
-      headers: buildSegmentAudioCacheHeaders('redirect'),
-    });
-  } catch (error) {
-    console.error('Error creating segment audio signature:', error);
-    return NextResponse.json({ error: 'Failed to prepare segment audio' }, { status: 500 });
-  }
-}
diff --git a/src/lib/server/tts/segments-audio.ts b/src/lib/server/tts/segments-audio.ts
index f080ac9..0b12372 100644
--- a/src/lib/server/tts/segments-audio.ts
+++ b/src/lib/server/tts/segments-audio.ts
@@ -11,7 +11,6 @@ export type ResolvedSegmentAudio = {
   audioKey: string;
 };
 
-export const TTS_SEGMENT_REDIRECT_CACHE_CONTROL = 'private, max-age=60, stale-while-revalidate=30';
 export const TTS_SEGMENT_FALLBACK_CACHE_CONTROL = 'private, max-age=300, stale-while-revalidate=60';
 export const TTS_SEGMENT_AUDIO_VARY = 'Cookie, Authorization';
 
@@ -22,20 +21,9 @@ export function ttsSegmentsS3NotConfiguredResponse(): NextResponse {
   );
 }
 
-export function streamAudioBuffer(buffer: Buffer): ReadableStream<Uint8Array> {
-  return new ReadableStream<Uint8Array>({
-    start(controller) {
-      controller.enqueue(new Uint8Array(buffer));
-      controller.close();
-    },
-  });
-}
-
-export function buildSegmentAudioCacheHeaders(kind: 'redirect' | 'fallback'): Record<string, string> {
+export function buildSegmentAudioCacheHeaders(): Record<string, string> {
   return {
-    'Cache-Control': kind === 'redirect'
-      ? TTS_SEGMENT_REDIRECT_CACHE_CONTROL
-      : TTS_SEGMENT_FALLBACK_CACHE_CONTROL,
+    'Cache-Control': TTS_SEGMENT_FALLBACK_CACHE_CONTROL,
     Vary: TTS_SEGMENT_AUDIO_VARY,
   };
 }
diff --git a/tests/unit/tts-segments-audio-cache.spec.ts b/tests/unit/tts-segments-audio-cache.spec.ts
index d1ce894..ce09173 100644
--- a/tests/unit/tts-segments-audio-cache.spec.ts
+++ b/tests/unit/tts-segments-audio-cache.spec.ts
@@ -4,19 +4,11 @@ import {
   normalizeAudioByteRangeHeader,
   TTS_SEGMENT_AUDIO_VARY,
   TTS_SEGMENT_FALLBACK_CACHE_CONTROL,
-  TTS_SEGMENT_REDIRECT_CACHE_CONTROL,
 } from '../../src/lib/server/tts/segments-audio';
 
 test.describe('tts segment audio cache headers', () => {
-  test('builds redirect cache headers', () => {
-    expect(buildSegmentAudioCacheHeaders('redirect')).toEqual({
-      'Cache-Control': TTS_SEGMENT_REDIRECT_CACHE_CONTROL,
-      Vary: TTS_SEGMENT_AUDIO_VARY,
-    });
-  });
-
   test('builds fallback cache headers', () => {
-    expect(buildSegmentAudioCacheHeaders('fallback')).toEqual({
+    expect(buildSegmentAudioCacheHeaders()).toEqual({
       'Cache-Control': TTS_SEGMENT_FALLBACK_CACHE_CONTROL,
       Vary: TTS_SEGMENT_AUDIO_VARY,
     });