Learn to play the recorder and improve on rhythm and pitch. tonestro listens to you while you play the recorder and gives you immediate live-feedback on rhythm and pitch. A tuner lets you tune your recorder easily. tonestro for Recorder offers a large collection of songs, exercises and guided lessons for every skill level. Learn how to read music notes and improve your recorder skills by playing many songs and exercises. With the tuner you tune your recorder fast and easily for perfect pitch.