The Alto Flute
The alto flute is about 86cm long, it's very similar to the concert flute, just longer. It sometimes has a curved headjoint to help reach keys. The alto flute is tuned a 4th lower than the concert flute, and sounds more quiet and mellow. When played, the sound comes out a 4th lower than the notes on the page.
Here's a video to show you what a alto flute sounds like..
Here's a video to show you what a alto flute sounds like..