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@@ -38,3 +38,33 @@ cd build
 ctest
 cd ..
 ```
+
+## Tools
+
+### Spectrogram Tool (`spectool`)
+
+A command-line tool for analyzing WAV and MP3 files into spectrograms and playing them back.
+
+#### Building the Tool
+
+To build `spectool`, you need to enable the `DEMO_BUILD_TOOLS` option in CMake.
+
+```bash
+cmake -S . -B build -DDEMO_BUILD_TOOLS=ON
+cmake --build build
+```
+The executable will be located at `build/spectool`.
+
+#### Usage
+
+**Analyze an audio file:**
+```bash
+./build/spectool analyze path/to/input.wav path/to/output.spec
+# or
+./build/spectool analyze path/to/input.mp3 path/to/output.spec
+```
+
+**Play a spectrogram file:**
+```bash
+./build/spectool play path/to/input.spec
+```