prompter: Please give me some ideas for a jazzy but sombre chord progression.

assistant: To create a jazzy yet sombre chord progression, you could use the minor ii-V-I progression. This progression is often used in jazz and consists of a minor ii chord, a dominant V chord, and a minor i chord. You could also try using minor chords with a diminished 7th or half-diminished 7th added in, as this will create a darker, more mysterious sound. Additionally, you could try using a minor chord with a major 7th added in for a more bittersweet sound. Finally, you could experiment with adding some chromatic passing chords or tritone substitutions to your progression to further add to the sombre mood.

prompter: What specific notes are in each of those chords if I set the tonic to be E flat? Also include alternate chords with the diminished/half diminished 7ths you were talking about.

assistant: Sure, here's a jazzy but sombre chord progression you might try:

Am7b5 - D7b9 - Gm7 - C7b9 - Fm7 - Bb7#11 - Ebmaj7 - Edim7

Here's a breakdown of the chords and their functions:

. Am7b5: This is an A minor 7 flat 5 chord, also known as a half-diminished chord. It creates a tense and dissonant sound, which makes it great for sombre moods.
. D7b9: This is a D dominant 7 flat 9 chord, which has a similar dissonant and tense sound to the Am7b5. It leads naturally to the Gm7 chord.
. Gm7: This is a G minor 7 chord, which provides a sense of resolution after the tension of the previous chords. It also has a sombre quality to it.
. C7b9: This is a C dominant 7 flat 9 chord, which creates tension and sets up the Fm7 chord.
. Fm7: This is an F minor 7 chord, which has a dark and melancholy sound. It's a great choice for a sombre mood.
. Bb7#11: This is a B flat dominant 7 sharp 11 chord, which creates tension and sets up the next chord, Ebmaj7.
. Ebmaj7: This is an E flat major 7 chord, which provides a sense of resolution after the tension of the previous chords. It also has a jazzy quality to it.
. Edim7: This is an E diminished 7 chord, which adds a bit of dissonance and tension to the end of the progression.

Overall, this chord progression has a sense of tension and release, with some sombre and jazzy elements mixed in. You could try experimenting with different rhythms and tempos to further develop the mood and feel of the progression.

prompter: I want to play this on a guitar. What are some good references for finger charts in various neck positions.

assistant: There are many resources available online for guitar chord charts in different neck positions. Here are a few that you may find useful:

Ultimate Guitar: This website has a comprehensive database of guitar chords, with finger charts for many different positions on the neck. You can search for specific chords or browse through their library to find ones that fit your needs.

Chordbook: This website offers a variety of chord charts, including ones for different neck positions. You can select the root note and chord type to see the finger positions for the chord in different positions on the neck.

Guitar Chalk: This website offers a range of chord charts, including ones for more advanced chord shapes in different positions on the neck. They also provide explanations of how to play each chord and tips for fingering.

Justin Guitar: This website offers a wide range of guitar lessons, including lessons on chord theory and chord progressions. They also provide chord charts for various chords in different neck positions.

Chordie: This website offers a comprehensive database of guitar chords, including finger charts for different positions on the neck. You can search for specific chords or browse through their library to find ones that fit your needs.

Remember, it's always a good idea to practice new chords slowly and carefully, paying attention to your finger placement and making adjustments as needed. Over time, with practice, your fingers will become more accustomed to the different positions and your playing will become more fluid.

assistant: You could try the website https://www.guitar-chord.org/chart.html which contains finger charts for chords used in multiple genres including Jazz.

assistant: In C minor: Cm, G/B, Cm/B♭, Am7(♭5) (Im→V/7→Im/♭7→VIm7(♭5)) has some jazzy chords but a sad feel. This is used in Stairway to Heaven.

prompter: Write me a bass guitar part that would sound good under those cords. Suggest a time signature to enhance the sombre mood.

assistant: 4/4 will work well if you want to emphasize strong downbeats, but since you're looking to enhance the sombre mood, try 6/8 time. The triplet beat will give you more notes between downbeats, which can make it sound either sombre or jazzy, depending on the tempo. Here's my suggested bass guitar tab to go with a slower 6/8 time signature:
```
G|--------------------
D|--------------------
A|--3--3--3--2--0--0--
E|--------------------

G|--------------------
D|--------------------
A|--2--2-----3--3-----
E|--------------------

G|--------------------
D|--------------------
A|--2-----------------
E|-----------1--------

G|--------------------
D|--------------------
A|--0--0--0--0--0--0--
E|--------------------
```

assistant: Sure, here is an example of a bass guitar part that would work well with the chord progression I suggested:

| Cm | G/B | Cm/Bb | Am7(b5) |
| G  | G   | G     | G       |
| F  | F   | F     | F       |
| Eb | Eb  | Eb    | Eb      |

This bassline is fairly simple and doesn't have a lot of movement, which can help create a sombre feel. The notes are all from the C natural minor scale, which is the same scale as the chord progression. The bassline emphasizes the root notes of each chord, with the occasional descending chromatic line to add interest.

As for time signature, you might consider using a slow 6/8 or 3/4 time signature to enhance the sombre mood. These time signatures have a more relaxed, flowing feel, which can be a good match for a sad or melancholic chord progression.

assistant: Here's a bass guitar part that would sound good under those chords in 4/4 time:

```
| Cm      | G/B     | Cm/Bb   | Am7(b5) |
| G       | G       | G       | G       |
| Ab      | Ab      | Ab      | Ab      |
| Bb      | Bb      | Bb      | Bb      |
| Eb      | Eb      | Eb      | Eb      |
| F       | F       | F       | F       |
| G       | G       | G       | G       |
| G       | G       | G       | G       |

```

This bass part is simple and mostly consists of whole note and half note rhythms, which helps to emphasize the somber mood of the chords. The first three bars follow the chord progression, with the bass notes moving in a descending line from C to Bb. The fourth bar is a bit different, using a walking bass line with a descending chromatic pattern (Bb - A - Ab - G) to lead into the next repetition of the chord progression.

Feel free to adjust the part to your liking, adding in more complex rhythms or different patterns to fit the mood and style of the music.