UJAM

UJAM is a free Beta Program that allows you to sing, hum, whistle or make any sort of sound into your mic and convert it to any instrument you want. It allows for pitch editing and placing a selected beat to underlay your original recording.

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This should help for making original compositions in everyone's film. It's easy and free for the time being. Hope you can make use of this new tool and hopefully it will remain free to use and eventually be a full use program once beta has ended.