finished signal representations

Table_of_Contents.ipynb

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   "name": "",
-  "signature": "sha256:b7c48e9311519e2e338ab9072caa5072a49010b16e8889c33a77f42d92305d59"
+  "signature": "sha256:a93cc4cdf1c8fbbd85804e7a0e473a9b180d28565d809b3d7c092289fc56a746"
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@@ -48,7 +48,7 @@
      "level": 2,
      "metadata": {},
      "source": [
-      "MIR Basics and Applications"
+      "Basic Signal Manipulation"
      ]
     },
     {
@@ -58,8 +58,6 @@
       "1.  [Segmentation](notebooks/segmentation.ipynb)\n",
       "1.  [Signal Representations](notebooks/signal_representations.ipynb)\n",
       "1.  [Onset Detection](notebooks/onset_detection.ipynb)\n",
-      "1.  [Beat Tracking](notebooks/beat_tracking.ipynb)\n",
-      "1.  [Tempo Estimation](notebooks/tempo_estimation.ipynb)\n",
       "1.  [Exercise: Understanding Audio Features through Sonification](exercises/feature_sonification.ipynb)"
      ]
     },
@@ -78,8 +76,10 @@
       "1.  [Feature Extraction](notebooks/feature_extraction.ipynb)\n",
       "1.  [Spectral Features](notebooks/spectral_features.ipynb)\n",
       "1.  [Tonal Descriptors: Pitch and Chroma](notebooks/)\n",
-      "1.  [Onset Detection](notebooks/onset_detection.ipynb)\n",
-      "1.  [Mel-Frequency Ceptral Coefficients](notebooks/mfcc.ipynb)"
+      "1.  [Beat Tracking](notebooks/beat_tracking.ipynb)\n",
+      "1.  [Tempo Estimation](notebooks/tempo_estimation.ipynb)\n",
+      "1.  [Mel-Frequency Ceptral Coefficients](notebooks/mfcc.ipynb)\n",
+      "1.  [Exercise: Instrument Classification using K-NN](exercises/knn_instrument_classification.ipynb)"
      ]
     },
     {
@@ -98,7 +98,6 @@
       "1.  [K-Means Clustering](notebooks/kmeans.ipynb)\n",
       "1.  [Nonnegative Matrix Factorization](notebooks/nmf.ipynb)\n",
       "1.  [Cross Validation](notebooks/cross_validation.ipynb)\n",
-      "1.  [Exercise: Instrument Classification using K-NN](exercises/knn_instrument_classification.ipynb)\n",
       "1.  [Exercise: Unsupervised Instrument Classification using K-Means](exercises/)\n",
       "1.  [Exercise: Source Separation using NMF](exercises/nmf_source_separation.ipynb)"
      ]