# YamJJazz rhythm engine

JJazzLab embeds the **YamJJazz** rhythm generation engine. This engine reads [Yamaha styles](/user-guide/rhythm-engines/yamjjazz-rhythm-engine/yamaha-styles.md) and introduces a new [extended Yamaha style](/user-guide/rhythm-engines/yamjjazz-rhythm-engine/extended-yamaha-styles.md) format which adds more variations to existing Yamaha style files.

You can see below the 2 YamJJazz **rhythm providers** available in the rhythm selection dialog.

![](/files/-MQEBz-ysMqZvHotRF5B)


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