diff --git a/README.md b/README.md
index 1f939eb..cef408a 100644
--- a/README.md
+++ b/README.md
@@ -118,7 +118,7 @@ else:
 
 | 模型名称   | 模型类型               | 适配状态 | 沐曦 MetaX C500运行时间/s | Nvidia A100运行时间/s |
 | ---------- | ---------------------- | -------- | ----------------- | --------------------- |
-| kokoro     | StyleTTS 2, ISTFTNet   | 成功     | 202.6               | 5.4                   |
+| kokoro     | StyleTTS 2, ISTFTNet   | 成功     | 4.3               | 5.4                   |
 | f5-TTS     | DiT, ConvNeXt V2       | 成功     | 7.1               | 5.4                   |
 | gpt-sovits | VITS                   | 成功     | 24.4              | 20.5                   |
 | matcha     | OT-CFM, Transformer    | 成功     | 2.9               | 3.2                   |
diff --git a/metaX-C500-kokoro/README.md b/metaX-C500-kokoro/README.md
index 4afdda2..5a87470 100644
--- a/metaX-C500-kokoro/README.md
+++ b/metaX-C500-kokoro/README.md
@@ -42,5 +42,4 @@ curl --request POST "http://localhost:8080/tts" \
 
 ---
 
-- 无 Patch 能运行，但是生成的音频会有噪声
-- Patch: 将 decoder/istftnet 固定为 CPU FP32（禁用 AMP/TF32），修复 GPU “打字机”噪声
+- Patch: 修复torch.istft 复数运算出错问题 ，修复 GPU “打字机”噪声
diff --git a/metaX-C500-kokoro/kokoro_server.py b/metaX-C500-kokoro/kokoro_server.py
index d1e980e..e3a4e1b 100644
--- a/metaX-C500-kokoro/kokoro_server.py
+++ b/metaX-C500-kokoro/kokoro_server.py
@@ -16,6 +16,10 @@ from scipy.signal import resample
 import torch
 from torch import Tensor
 from torch.nn import functional as F
+
+import torch.nn as nn
+import types
+
 from typing import Optional, List
 import re
 from dataclasses import dataclass
@@ -95,56 +99,55 @@ def audio_postprocess(data: np.ndarray, original_rate: int, target_rate: int):
 
 # ================== decoder/istftnet 补丁 ==================
 
-def _to_cpu_fp32(obj):
-    if torch.is_tensor(obj):
-        return obj.detach().to("cpu", dtype=torch.float32)
-    if isinstance(obj, (list, tuple)):
-        return type(obj)(_to_cpu_fp32(x) for x in obj)
-    if isinstance(obj, dict):
-        return {k: _to_cpu_fp32(v) for k, v in obj.items()}
-    return obj
+import kokoro.istftnet as _ist
 
-def patch_decoder(model, device: str):
-    decoder = getattr(model, "decoder", None)
-    if decoder is None:
-        raise RuntimeError("未找到 model.decoder，请 print(model) 确认实际模块名。")
+def _inverse_no_complex(self, magnitude, phase):
+    device = magnitude.device
+    dtype = magnitude.dtype
 
-    decoder.eval().to(device).float()
-    try: torch.nn.utils.remove_weight_norm(decoder)
-    except Exception: pass
+    win_dev = torch.hann_window(self.win_length, device=device, dtype=dtype)
 
-    for p in decoder.parameters():
-        p.requires_grad = False
-        if p.dtype != torch.float32: p.data = p.data.float()
-    for n, b in decoder.named_buffers():
-        if b.dtype != torch.float32: setattr(decoder, n, b.float())
+    real = magnitude * torch.cos(phase)
+    imag = magnitude * torch.sin(phase)
+    spec_ri = torch.stack([real, imag], dim=-1).contiguous()  # (..., 2)
 
-    orig_forward = decoder.forward
+    real_cpu = real.to("cpu")
+    imag_cpu = imag.to("cpu")
+    spec_complex_cpu = torch.complex(real_cpu, imag_cpu)  # (..,) 复数张量
+    win_cpu = torch.hann_window(self.win_length, device="cpu", dtype=dtype)
 
-    def forward_patched(*args, **kwargs):
-        # 关键：decoder 运行时，强制 FP32、并保证输入与 decoder 在同一设备
-        with torch.amp.autocast('cuda', enabled=False):
-            if device == "cpu":
-                args_ = _to_cpu_fp32(args); kwargs_ = _to_cpu_fp32(kwargs)
-                out = orig_forward(*args_, **kwargs_)
-                return _to_cpu_fp32(out)
-            else:  # device == "cuda"
-                def to_gpu_fp32(x):
-                    if torch.is_tensor(x):
-                        return x.detach().to("cuda", dtype=torch.float32)
-                    if isinstance(x, (list, tuple)):
-                        return type(x)(to_gpu_fp32(t) for t in x)
-                    if isinstance(x, dict):
-                        return {k: to_gpu_fp32(v) for k, v in x.items()}
-                    return x
-                args_ = to_gpu_fp32(args); kwargs_ = to_gpu_fp32(kwargs)
-                out = orig_forward(*args_, **kwargs_)
-                if torch.is_tensor(out):
-                    return out.detach().to(device, dtype=torch.float32)
-                return out
+    wav_cpu = torch.istft(
+        spec_complex_cpu,
+        n_fft=self.filter_length,
+        hop_length=self.hop_length,
+        win_length=self.win_length,
+        window=win_cpu,
+        center=True,
+        normalized=False,
+        onesided=True,
+    )
+    return wav_cpu.to(device).unsqueeze(-2)
 
-    decoder.forward = forward_patched
+def _transform_no_complex(self, input_data):
+    z = torch.stft(
+        input_data,
+        n_fft=self.filter_length,
+        hop_length=self.hop_length,
+        win_length=self.win_length,
+        window=self.window.to(input_data.device, dtype=input_data.dtype),
+        return_complex=False,
+        center=True,
+        normalized=False,
+    )
+    real = z[..., 0]
+    imag = z[..., 1]
+    magnitude = torch.sqrt(real * real + imag * imag)
+    phase = torch.atan2(imag, real)
+    return magnitude, phase
 
+# 替换 Kokoro 的 STFT.inverse 实现
+_ist.TorchSTFT.inverse = _inverse_no_complex
+_ist.TorchSTFT.transform = _transform_no_complex
 
 
 def init():
@@ -153,7 +156,6 @@ def init():
     global pipeline_dict
     device = 'cuda' if torch.cuda.is_available() else 'cpu'
     model = KModel(repo_id=repo_id, model=os.path.join(model_dir, model_name), config=os.path.join(model_dir, 'config.json')).to(device).eval()
-    patch_decoder(model, "cpu")
 
     en_empty_pipeline = KPipeline(lang_code='a', repo_id=repo_id, model=False)
     en_pipeline = KPipeline(lang_code='a', repo_id=repo_id, model=model)