> There is an unsolvable disconnect between what the performer's actions and their audience
Is that really true though? If I watch a cellist play I can pretty clearly see all the things they are doing and it will correlate neatly to the timbre of the sound.
Secondly I think it's important to note the tube amp and the guitar are seperable, and I don't think that their connection is particularly magical. I can reamp a sound from my synthesizer (or maybe a keytar?) into a guitar chain, and if I manipulate the mic and other controls in the same way I might manipulate the pickup, I can also get all manner of interesting feedback effects. My inputs will have different harmonic characteristics of course, and the tube amp's effects are mostly transformations of harmonics; you'll still get some cool tones and they will be subject to a lot of the same rules as if a guitar was being played.
I'm talking about electronic instruments how they are deficient in expressiveness compared to your cello example.
> Secondly I think it's important to note the tube amp and the guitar are seperable, and I don't think that their connection is particularly magical. I can reamp a sound from my synthesizer (or maybe a keytar?) into a guitar chain, and if I manipulate the mic and other controls in the same way I might manipulate the pickup, I can also get all manner of interesting feedback effects.
The story is not quite so simple. Your synthesizer is going to have a buffered output so it wont have the complex impedance loading interactions with the amplifier as the guitar pickup.
This is actually critical to how early distortion effects such as the classic Fuzzface work and imo is essential for the kind of complex timbres you can produce with a guitar + tube amp.
In fact you can take an electric guitar, put a buffer pedal in the chain between your fuzz pedal and amp and completely destroy the ability to produce wild feedback and distortion.
they're comparing an electric guitar to electronic instruments, like midi keyboards. An electric cello would be the same thing as an electric guitar in this context.
They're talking about electronic instruments there. The comment is about how electronic instruments don't generally match the physical expressiveness of acoustic instruments (like the Cello).