Update cheatsheets

espeak

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+---
+syntax: markdown
+tags: [tldr, common]
+source: https://github.com/tldr-pages/tldr.git
+---
+# espeak
+
+> Uses text-to-speech to speak through the default sound device.
+> More information: <http://espeak.sourceforge.net>.
+
+- Speak a phrase aloud:
+
+`espeak "I like to ride my bike."`
+
+- Speak a file aloud:
+
+`espeak -f {{path/to/file}}`
+
+- Save output to a WAV audio file, rather than speaking it directly:
+
+`espeak -w {{filename.wav}} "It's GNU plus Linux"`
+
+- Use a different voice:
+
+`espeak -v {{voice}}`