I've been meaning to dive into some classical pieces myself. Mostly have stuck to jazz standards up to this point. I'll say though that a lot of these songs use simple seventh chords, but imply much larger and complex chord sounds through the melody (I imagine the same must be true for Beethoven and them, since they were one of the biggest influences on 20th century music). Start looking at which tones fall on the downbeats (1,2,3,4), these will carry more weight in the overall tonality of the piece of music than say some chromatic note placed on a weak beat (1e&a, 2e&a). The chromatic and scale notes placed on weak beats generally just imply color and motion when moving from chord tone to chord tone. But say the piece is in the key of C and there's a Gb directly on beat 3, this would imply a Cb5 chord.OK, I have not yet arrived at thirteenth chord country
So far, I am glad I can consider third and seventh chords as starting point for quick orientation - then breaking out as I feel it right on occasion. Which, to me affords much more courage than to stick to a "safe" pattern. Since I still lack the theoretic knowledge behind that, it is mostly trial and error. And that is one point I seek to learn to understand. So far, I only used some of my favorite Beethoven's scores to get an idea where and why he broke out of a scale, for example. The way he does it seems random at first, but feels musically right to me. Maybe he did that based on feeling alone - or there is a pattern behind, of which I haven't heard, yet. In terms of theory, I am not even at high school level, because I only kept in my brain what I was using - the rest faded with time. So I wouldn't be surprised if I already had heard about such a pattern and then forgot it![]()
If you really want to experiment on your bass take a simple song progression you like and play the chords to it on your bass (look into standard, inverted, and drop-two chords, the latter usually the most comfortable for bass players. Also don't voice the fifth in your chords for the time being, it's less to think about). Now when you get comfortable with that, play around with the chords a little bit. Add a flat nine, nine, sharp nine, sixth, or a flat or sharp fifth to the minor or major seven chords (try and turn any normal triads into a seventh chord too, make sure you pay attention to the key of the song though!). The dominant chords a free game, you can do just about anything to them as long as they maintain the original sound of the root, third and seventh (Remember too, chords can be voiced without the root or the fifth. You only need the third and seventh intervals present to sound the chord properly). Try making melodies and rhythms to your progression solely using the chord shape. Thump that bass note with the thumb and hit the higher tones (together or alone) with the fingers. I particularly love this approach when playing a song like "Blue Bossa" for example. You can simulate a real nice bossa/mambo line with chord shapes alone, plus it just sounds too cool when you start to comp and add in some extra chords and bass notes outside the original progression for more movement and color. Pianists step aside!

I refereed to the following pictures when I first started messing with these, though looking back on it I'd recommend going through your arpeggios and forming/altering your chords from these.
These are originally for guitar so make sure you take into account the half step change that occurs between strings G and B, I feel their use serves just as well for us bassists though.
Also I feel now is a good time to share some Steve Bailey for inspiration. And due to the fact that his playing is considered so "controversial" by some, I see him a good fit for this thread.
No you don't need a fretless to sound good!

)".