diff --git a/README.md b/README.md
index 731a4c8..fd2077f 100644
--- a/README.md
+++ b/README.md
@@ -2,6 +2,11 @@
 
 - Linux
 
+## Requirements
+
+- node
+- ffplay
+
 ## Installation
 
 ```
@@ -11,9 +16,12 @@ npm i -g git+https://git.yanknil.com/uohlhv/lingva-tts.git
 ## Usage
 
 ```
-# Speak the word `apple`
-lingva-tts --lang en --query apple | aplay -q -r 48000
+# Speak `This is an apple.`
+lingva-tts --lang en --query "This is an apple." | ffplay -f s16le -ar 48k -ac 1 -autoexit -nodisp -
 
-# Speak the content from selection (require xsel)
-xsel | lingva-tts --lang en --stdin | aplay -q -r 48000
+# Speak `This is an apple.` (Speed up the speak tempo by 2x)
+lingva-tts --lang en --query "This is an apple." | ffplay -f s16le -ar 48k -ac 1 -af "atempo=2" -autoexit -nodisp -
+
+# Speak text from cursor selection (Require xsel, and slow down the speak tempo by 0.5x)
+xsel | lingva-tts --lang en --stdin | ffplay -f s16le -ar 48k -ac 1 -af "atempo=0.5" -autoexit -nodisp -
 ```