To download mp3 (audio): Click "Download mp3" button
To Cut/Crop mp3: Please use the slider below and click on "Download mp3" button to download the selected part.
Note that video to mp3 conversion output is limited to 10 minutes.
The Otto engine is a combustion engine and is considered to be a technological milestone of human thought. It was named after its inventor, Nikolaus August Otto. Otto engines are used in motorcycles, cars and other vehicles. This animation explains the Otto engine.