One of the most fundamental ways you can improve your soloing once you figure out what notes you can play is to use a wide variety of rhythms in your solo. Just because this is fundamental does not mean this is easy beginner stuff. Some of the most challenging things in music are the rhythms. So what makes up rhythmic variety?
There are many different rhythmic groups, using rhythmic variation simply means to switch between these to create an interesting sound. When this is done well, your solo will sound more interesting and less like rambling. Lets discuss the different rhythmic units so we can know what the possibilities are to use in our solo.
Silence is music too. The musical term for silence is rest. Whenever you use silence in your solo lines you will cause rhythmic variation. Experiment with using silence, putting it in different places. Sometimes Silence says more than noise.
Swing, or not to swing:
What is the definition of Swing? This is a question that will give you 100 different answers if you ask 100 different people. The most universal definition of swing is a Dotted 8th note 16th note feel. Have you ever heard great big band songs from back in the day? In The Mood is a good example of swing. It has a bouncing feel. Now, don’t be fooled, Swing can be used in any style. Its origin is in the 1930s swing era of jazz, but country, blues, rock, bluegrass and any other style you can think of uses it as well. It can create a cool rhythmic feel. Try it.
There are many different lengths of notes that you can use. Here is a list of note values in music:
32nd note (mostly used in slow songs, otherwise it is too fast)
Triplet note values:
All the note values above also have triplets. If you are playing a long 8th note line in jazz, throw in triplets for interest. One note value by itself will get boring. Triplets can sound extremely awesome.
Don’t be boxed in by note values:
There are no rules against holding a note longer than a whole note. There are no names for these rhythmic values, but they exist. Also there is no law against going out of time and coming back into time. (Be very careful with that option, but it can be done)
This wraps up the main ways to add variation. Experiment with mixing all of these together and see what you can come up with. A great way to practice this is to pick one note and try to make an interesting solo with it. Listen to a lot of musicians solo and see how they use variation in their rhythm. Listen a lot, you can even transcribe rhythms by themselves, or sing the rhythms as they play. Have fun going out there and making interesting music.