diff --git a/doc/_notebooks/waveform.ipynb b/doc/_notebooks/waveform.ipynb
index 775bed6b546d69ef62ff1c8cb2dcb47b2d4c2553..c381fc7c6924991490bf0d40186e425e653f7ab5 100644
--- a/doc/_notebooks/waveform.ipynb
+++ b/doc/_notebooks/waveform.ipynb
@@ -96,7 +96,7 @@
    "outputs": [],
    "source": [
     "# initialization with missing samples\n",
-    "wm = Waveform(x, mask, fs=fs)\n",
+    "wm = Waveform(x, fs=fs, mask=mask)\n",
     "wm.plot()\n",
     "print(wm)"
    ]
@@ -551,7 +551,7 @@
     "w_clipped = Waveform(x, fs=1)\n",
     "\n",
     "# Clip the signal\n",
-    "w_clipped.clip(dtype=np.int16)\n",
+    "w_clipped.astype(np.int16)\n",
     "\n",
     "# Plot signals\n",
     "plt.figure()\n",