Since all melodies are made up of a series of intervals, it is essential to learn to identify intervals by ear and be able to reproduce them at will both with your voice and on your instrument. If you can sing something accurately, it means you are hearing it accurately.
Here are some ways of developing your ability to identify and reproduce intervals. The example given in the first two exercises is a minor 3rd, but it is essential to go through these processes with all intervals.
It is important to work at these things regularly until they become easy. Don’t get frustrated if you can’t hear intervals accurately at first. Most people have trouble with this. If you work at it for several months, you will see a dramatic improvement in your musical hearing, and will be able to improvise much more freely as well as being able to work out parts off CDs more easily.
Here are some exercises to help you get more comfortable playing in any key. Remember to play each one in all possible positions on the fretboard. Each one is written in a different key, but they are intended to be played in all keys. The first one is a sequence in the key of D major.
This one alternates between the note B and every other note in the B major scale, both ascending and descending.
Don’t forget to practice the chromatic scale in every key. Here it is in the key of Gb.
Finally, here is one which alternates between the note A and every other note in the A chromatic scale, once again ascending and descending.
The following example demonstrates a melody in the key of C which contains notes from outside the major scale.
The following examples demonstrate the same melody transposed to the keys of F and G. Once again, you should transpose it to all the other keys. Before doing this it is worth learning to play the chromatic scale starting on any note. If you do this, it will be easier to play melodies in any key and also make it easier to transpose any melody that you learn in any key.
Here is a Jazz Blues solo in the key of F which makes use of many different intervals. Go through it and analyze the intervals and also the scale degrees against the F chromatic scale. Notice the use of both major and minor 3rd degrees, as well as the flattened 5th and 7th degrees of the scale. The b3, b5 and b7 are known as blue notes and are particularly common in all forms of Blues. As with many previous examples, the harmonica has been omitted from the recording on the repeat to leave space for you to play the solo with the band. You should also try improvising with the backing.
Here is a famous Ragtime melody written by Scott Joplin. Originally written for piano, it also sounds great on chromatic harmonica. It is well worth looking for other pieces originally written for other instruments and learning to play them on the chromatic.