Thank you for the very good question about the lesson "Voice Leading VOL. 1" !
In this lesson, (since it's volume 1) we mostly focus on the top voice of the chord, and we learn how to be creative and play melodies on top of the chord progressions using the diatonic major scale as well as arpeggio lines that connects the chords in a nice way. This is step one in learning about voice leading on guitar. How to be melodic in your chord melody and when you accompany someone on the guitar. This also helps you to learn more voicings on the instrument, which is important when you want to take the next step towards more advanced harmony and "voice leading" playing.
You can definitely use the concepts when you're creating your own arrangements, but this lesson is made for anyone who plays guitar and not necessarily only solo fingerstyle guitar players. In other words, these concepts works great no matter what constellation you're playing in.. solo, duo, or in a band setting.
In Vol. 2 however (this lesson is what I'm working on at the moment and will be released later this month), we're focusing more on the chromatic alterations, and how these voices can be moved in common chord progressions.
How to create great sounding progressions and voice leading, and how to use more altered chords in your accompaniment or solo guitar playing!
Stay tuned for Voice Leading VOL. 2, which I hope you'll enjoy too! :)
Have a wonderful week Rostislav, and thanks for being part of our community!