diff --git a/Dockerfile b/Dockerfile
index 21cd07d..c4bc476 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -6,7 +6,6 @@ WORKDIR /app/web
 COPY web/package*.json ./
 RUN npm install --no-audit --no-fund
 COPY web/ .
-# Umgebungsvariable für React Build verfügbar machen (Vite liest nur VITE_*)
 ARG VITE_BUILD_CHANNEL=stable
 ARG VITE_APP_VERSION=1.1.0
 ENV VITE_BUILD_CHANNEL=$VITE_BUILD_CHANNEL
@@ -21,9 +20,19 @@ COPY server/package*.json ./
 RUN npm install --no-audit --no-fund
 COPY server/ .
 RUN npm run build
-# Nur Prod-Dependencies für Runtime behalten. rm -rf and cleanly install to prevent npm prune bugs
 RUN rm -rf node_modules && npm install --omit=dev --no-audit --no-fund
 
+# --- Static ffmpeg binary (nur ffmpeg, kein ffprobe - wird nicht benutzt) ---
+FROM debian:bookworm-slim AS ffmpeg-fetch
+RUN apt-get update && apt-get install -y --no-install-recommends curl xz-utils ca-certificates \
+ && rm -rf /var/lib/apt/lists/* \
+ && curl -L https://github.com/yt-dlp/FFmpeg-Builds/releases/download/latest/ffmpeg-master-latest-linux64-gpl.tar.xz \
+    -o /tmp/ffmpeg.tar.xz \
+ && mkdir -p /tmp/ffmpeg \
+ && tar -xJf /tmp/ffmpeg.tar.xz -C /tmp/ffmpeg --strip-components=2 --wildcards "*/bin/ffmpeg" \
+ && chmod +x /tmp/ffmpeg/ffmpeg \
+ && rm /tmp/ffmpeg.tar.xz
+
 # --- Runtime image ---
 FROM node:24-slim AS runtime
 WORKDIR /app
@@ -31,11 +40,12 @@ ENV NODE_ENV=production
 ENV PORT=8080
 ENV SOUNDS_DIR=/data/sounds
 
-RUN apt-get update && apt-get install -y ffmpeg curl ca-certificates && rm -rf /var/lib/apt/lists/* \
+RUN apt-get update && apt-get install -y --no-install-recommends ca-certificates curl \
  && curl -L https://github.com/yt-dlp/yt-dlp/releases/latest/download/yt-dlp -o /usr/local/bin/yt-dlp \
  && chmod a+rx /usr/local/bin/yt-dlp \
- && yt-dlp --version || true
+ && apt-get purge -y curl && apt-get autoremove -y && rm -rf /var/lib/apt/lists/*
 
+COPY --from=ffmpeg-fetch /tmp/ffmpeg/ffmpeg /usr/local/bin/ffmpeg
 COPY --from=server-build /app/server/dist ./server/dist
 COPY --from=server-build /app/server/node_modules ./server/node_modules
 COPY --from=server-build /app/server/package.json ./server/package.json
@@ -44,6 +54,3 @@ COPY --from=web-build /app/web/dist ./web/dist
 EXPOSE 8080
 VOLUME ["/data/sounds"]
 CMD ["node", "server/dist/index.js"]
-
-
-
diff --git a/server/src/index.ts b/server/src/index.ts
index 121c097..3c536c4 100644
--- a/server/src/index.ts
+++ b/server/src/index.ts
@@ -24,7 +24,7 @@ import sodium from 'libsodium-wrappers';
 import nacl from 'tweetnacl';
 // Streaming externer Plattformen entfernt – nur MP3-URLs werden noch unterstützt
 import child_process from 'node:child_process';
-import { PassThrough } from 'node:stream';
+import { PassThrough, Readable } from 'node:stream';
 
 const __filename = fileURLToPath(import.meta.url);
 const __dirname = path.dirname(__filename);
@@ -158,6 +158,35 @@ const NORMALIZE_TP = String(process.env.NORMALIZE_TP ?? '-1.5');
 const NORM_CACHE_DIR = path.join(SOUNDS_DIR, '.norm-cache');
 fs.mkdirSync(NORM_CACHE_DIR, { recursive: true });
 
+// In-Memory PCM Cache: gecachte PCM-Dateien werden beim ersten Abspielen in den RAM geladen.
+// Danach kein Disk-I/O mehr bei Cache-Hits -> nahezu instant playback.
+const pcmMemoryCache = new Map<string, Buffer>();
+const PCM_MEMORY_CACHE_MAX_MB = Number(process.env.PCM_CACHE_MAX_MB ?? '512');
+let pcmMemoryCacheBytes = 0;
+
+function getPcmFromMemory(cachedPath: string): Buffer | null {
+  const buf = pcmMemoryCache.get(cachedPath);
+  if (buf) return buf;
+  // Erste Anfrage: von Disk in RAM laden
+  try {
+    const data = fs.readFileSync(cachedPath);
+    const newTotal = pcmMemoryCacheBytes + data.byteLength;
+    if (newTotal <= PCM_MEMORY_CACHE_MAX_MB * 1024 * 1024) {
+      pcmMemoryCache.set(cachedPath, data);
+      pcmMemoryCacheBytes = newTotal;
+    }
+    return data;
+  } catch { return null; }
+}
+
+function invalidatePcmMemory(cachedPath: string): void {
+  const buf = pcmMemoryCache.get(cachedPath);
+  if (buf) {
+    pcmMemoryCacheBytes -= buf.byteLength;
+    pcmMemoryCache.delete(cachedPath);
+  }
+}
+
 /** Erzeugt einen Cache-Key aus dem relativen Pfad (Slash-normalisiert, Sonderzeichen escaped) */
 function normCacheKey(filePath: string): string {
   const rel = path.relative(SOUNDS_DIR, filePath).replace(/\\/g, '/');
@@ -172,7 +201,7 @@ function getNormCachePath(filePath: string): string | null {
   try {
     const srcMtime = fs.statSync(filePath).mtimeMs;
     const cacheMtime = fs.statSync(cacheFile).mtimeMs;
-    if (srcMtime > cacheMtime) { try { fs.unlinkSync(cacheFile); } catch {} return null; }
+    if (srcMtime > cacheMtime) { try { fs.unlinkSync(cacheFile); } catch {} invalidatePcmMemory(cacheFile); return null; }
   } catch { return null; }
   return cacheFile;
 }
@@ -381,9 +410,19 @@ async function playFilePath(guildId: string, channelId: string, filePath: string
   if (NORMALIZE_ENABLE) {
     const cachedPath = getNormCachePath(filePath);
     if (cachedPath) {
-      // Cache-Hit: gecachte PCM-Datei als Stream lesen (kein ffmpeg, instant)
-      const pcmStream = fs.createReadStream(cachedPath);
-      resource = createAudioResource(pcmStream, { inlineVolume: true, inputType: StreamType.Raw });
+      // Cache-Hit: PCM aus RAM lesen (kein Disk-I/O, instant)
+      const pcmBuf = getPcmFromMemory(cachedPath);
+      if (pcmBuf) {
+        const useInline = useVolume !== 1;
+        resource = createAudioResource(Readable.from(pcmBuf), {
+          inlineVolume: useInline,
+          inputType: StreamType.Raw
+        });
+      } else {
+        // Fallback: Stream von Disk
+        const pcmStream = fs.createReadStream(cachedPath, { highWaterMark: 256 * 1024 });
+        resource = createAudioResource(pcmStream, { inlineVolume: true, inputType: StreamType.Raw });
+      }
     } else {
       // Cache-Miss: ffmpeg streamen (sofortige Wiedergabe) UND gleichzeitig in Cache schreiben
       const cacheFile = path.join(NORM_CACHE_DIR, normCacheKey(filePath));
@@ -402,6 +441,14 @@ async function playFilePath(guildId: string, channelId: string, filePath: string
         playerStream.end();
         cacheWrite.end();
         console.log(`${new Date().toISOString()} | Loudnorm cached: ${path.basename(filePath)}`);
+        // In Memory-Cache laden fuer naechsten Aufruf
+        try {
+          const buf = fs.readFileSync(cacheFile);
+          if (pcmMemoryCacheBytes + buf.byteLength <= PCM_MEMORY_CACHE_MAX_MB * 1024 * 1024) {
+            pcmMemoryCache.set(cacheFile, buf);
+            pcmMemoryCacheBytes += buf.byteLength;
+          }
+        } catch {}
       });
       ff.on('error', () => { try { fs.unlinkSync(cacheFile); } catch {} });
       ff.on('close', (code) => {
@@ -1535,6 +1582,11 @@ if (fs.existsSync(webDistPath)) {
   });
 }
 
+// Node 24 warnt bei negativen Timeout-Werten (aus @discordjs/voice intern) - harmlos unterdruecken
+process.on('warning', (warning) => {
+  if (warning.name === 'TimeoutNegativeWarning') return;
+  console.warn(warning.name + ': ' + warning.message);
+});
 process.on('uncaughtException', (err) => {
   console.error(`FATAL uncaughtException:`, err);
   process.exit(1);