The cool thing about AceNote is the range of proficiency. We have members who are just starting to figure out major chords like G and D to members who have been playing instruments their whole lives. AceNote founder, Mimi Fox, is an internationally renowned jazz guitarist who sent over this post about Hungarian Minor Scale Improvisation. For more information on Mimi Fox, check out her AceNote profile: http://www.acenote.com/user/38
This is a scale that is not used very often in jazz/rock circles that really has many fascinating applications.
Here is its composition in the key of C: C, Db, E, F, G, Ab, B
Interesting to note is the fact that although this scale has a B, or major seventh in it, it actually sounds fantastic used over a C7 chord! The B natural acts as a passing tone into the tonic. If you tape yourself playing a C7 chordal vamp you will see what I mean. The scale sounds great if you are vamping on the C7 or if you have a vamp going from C7 to Db7 and back again as in a song like "Caravan". If you start this scale on the 4th degree (F) you will actually be playing the F Hungarian minor scale which would work over an F minor chord (no seventh) or over an F minor/major seventh chord.
You can therefore make a vamp using C7 and F minor and the scale will sound great (this chord progression is most commonly heard at Bar Mitzvah's but this should not stop you from fully exploiting its unique properties).
I have also used this scale over a minor blues and it sounds fantastic. The addition of the B natural or blues tone to the scale is very cool. Very often, rock players will bend to this blues note automatically but they are doing it starting on the Bb. In this case, because there is no Bb in this F minor mode you are able to arrive at the B natural without bending to it.
To get comfortable playing this scale, you should harmonize it ascending/descending throughout the entire range of your instrument. You'll notice some unusual harmonic clusters that can be created from this scale. These clusters can be played in consecutive fashion and used to construct new arpeggios. For example, I could take the 3 notes, C, Db, and G and create a nice arpeggio from this 3 note grouping that could have wide applications. These 3 notes could be used over a Db Major Seventh chord, an Ab Major Seventh (with 11), a Bb Minor 6/9, A7 and Eb7 altered, etc. etc.
Tape yourself playing vamps and explore the new sounds! Have fun.