Drum machines are,the ULTIMATE metronomes!Not only can you program your OWN rhythms,you can also program modified metronomes(4/4 accenting 1/8th notes,1/16thnote,3/4,ditto,...etc.),as well as,use the preset rhythms.As I've stated,in a previous posting,what I love about drum machines is that,once you set a tempo,the time WILL NOT BUDGE.It teaches you about your sense of time,in the same sense as,playing upright bass with a bow,teaches you about intonation,...It'll make you pay strict attention!I currently own a Zoom Rhythmtrak 123,....I've had it for 10 years,now,and I still workout with it.As well,It's the MAIN drum machine,in my studio set-up(my board also has a built-in drum machine).Get the drum machine,....you'll be more than happy,that you did! Peace!