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+++ b/README.md
@@ -1,6 +1,6 @@
 # USB I2S Speaker
 
-![](img/speaker.jpg)
+<img width=60% src="img/speaker.jpg"/>
 
 This code implements a USB speaker streaming audio to an I2S device, based on [Phil Schatzmann's port](https://www.pschatzmann.ch/home/2024/10/13/tinyusb-audio-on-an-rp2040-in-arduino/) of the TinyUSB Audio class for the rp2040.
 
@@ -9,7 +9,7 @@ This code implements a USB speaker streaming audio to an I2S device, based on [P
 This code uses the [Arduino pico](https://github.com/earlephilhower/arduino-pico) core, and two libraries:
 
 - [Adafruit TinyUSB](https://github.com/pschatzmann/Adafruit_TinyUSB_Arduino/tree/Audio): this is the version modified by Phil Schatzmann to handle the Audio class on the rp2040.
-- [I2S]: Arduino's standard I2S library.
+- [I2S](https://docs.arduino.cc/learn/built-in-libraries/i2s/): Arduino's standard I2S library.
 
 ## Code