No. Harmonics combine to form TIMBRE, not a "chord". One may be able to pick out individual tones out of the harmonic structure of a given sound, but it depends on the sound (flutes have very few overtones for example), the original pitch (higher pitches will have harmonics that exceed our range of hearing earlier), the harmonic structure (some waveforms have only odd numbered overtones, some have inharmonic overtones, some have aperiodic waveforms (noise), etc.). If we could "hear" a chord within the overtones of a particular instrument, it's unlikely we would have ever found minor 3rds as being a consonant interval since they'd "clash" with the major 3rd overtone.When harmonics come into play, aren't we technically hearing chords?
Absolutely. As I mentioned in my first response to the OP though, we're dealing with a style of music which is chordally-based. Of course there are going to be chords! It can't survive ling without them.However, if what you're pointing at is less tech (i.e. simply playing a note; harmonics, etc... included), then I'll work from there. BB is also singing on top of his "single notes." Ergo, he's actually playing a chord, but using his whole delivery to present it. In fact, even when he's not singing, there's a bass guitar going on. So, we're back to the bass+guitar singles = aggregate chord equation, again.
Using another analogy, arpeggiators can do a pretty full job using single notes. However, they are also boring by themself. So, we add another, or perhaps, some other track using single notes. However, when they are combines, we're hearing a distributed chord, yeah?
"Solo" lines are something of a rarity - the opening vocal to Styx's "Renegade", the single note bass line intro to The Door's "People are Strange", the opening lick to Wild Cherry's "Play That Funky Music (White Boy)" - all of them are unaccompanied melodies - until the chords come in.
And even then, sometimes, there are solo lines that follow a harmony or imply a harmony - there are some Bach Sonatas for Solo Recorder (or other similar instruments) that, while they can only play one note at a time, play arpeggios that outline chords so it's pretty obvious what the harmony is (I've heard jazz players do the same thin on sax, etc.).
But again, these are all chordally-based styles, so we kind of expect that.
How about Edgard Varese's "Density" - It's called Density 5.21 or something (the numbers are the density of platinum, from which good flutes are made) and is just solo notes. No harmony. It's also "modern", so any harmony it does imply is non-traditional.Your thoughts?
It may not be your cup of tea, but many people feel it's fine music, and there's not a "chord" in earshot!
And again, Gregorian Chant existed for 100s of years in an unaccompanied form.
We just tend to be a little "set in our ways" as far as using harmony is concerned.
Best,