What an interesting discussion!
I think jasensmith's analogy of actors and playwrights is spot-on. I used to be a playwright (and actor) myself; I was always delighted to see what a good performer could do with even the most carefully and specifically worded dialogue and stage direction. I was also subsequently disappointed and embarassed when a bad performer crushed my words into mundane, emotionless drivel. I suppose it all boils down to who is performing your works. If they're good, they'll elevate your ideas to a new level you never thought possible. If they're bad, well...don't hire bad performers 😊
I think it's also worth noting that the more room for improvisation, the farther a good performer will go towards elevating a piece of music. In my opinion, great soloists in classical music tend to serve as virtuosic vehicles for the realization of precisely defined musical ideas, whereas in realms like jazz a great soloist is part of the compositional process itself since the musical ideas are so skeletal by design. This is probably why samples go so far in the classical realm but often fall quite short when attempting to mock-up jazz.
Anyhow...
It used to be an inevitable fact that composers had to put their works into the hands of others for them to even be heard (poor Rachmaninov...). Now, samples give us every increasing fidelity and flexibility in bypassing that limitation. So what's the point of live performance in the era of recording and digital audio?
I think William hit the nail on the head:
Those are some good points - what it boils down to is the interest or perspective of the audience. Are they interested in seeing their favorite performers do their thing, or are they interested in the musical ideas of the composer? Obviously both, but sometimes I think it is almost entirely focused on the performers. The person who wants to watch Yo yo ma play scales is involved in hero-worship, not music.
I don't believe for a fraction of a second that most people who go to a live performance do so just because they want to hear the music when it's so much cheaper (and often more sonically pleasing) to listen to a recording. They want to see the music performed, to bask in the glory of the performer(s), to share an experience with friends/family, to get drunk and dance (at a non-classical show), to take selfies and post them on instagram, etc.
Now, lest I be mistaken for a misanthrope, I don't think any of the above are bad things. I just think it's the reality of live music; the music is only a fraction of the whole experience. It's why I personally don't enjoy going to most live performances. I want to hear the music, not watch the performer, and I can almost always do this more effectively on a good stereo system listening to a well-mixed and edited recording. I also find watching performers - especially singers and pianists - incredibly distracting, but that's probably just a quirk of mine...
This is where I think the analogy to theater/film breaks down. If we see a movie, we're obviously going to see it so we can watch a story unfold. If we go to see music, are we going to listen to the music of the composer? To dance to it? To study how a particular soloist performs a passage we're working on? To enjoy room acoustics that can't be enjoyed any other way? To flaunt our wealth and social status by posting our 7th row seats on facebook?
So what's the point of live performance?
I think the answer is this: can live performance do something for the music and the experience of listening to said music that digital audio reproduction cannot? If the answer is yes, then live performance is worth chasing down. If the answer is no, then we are incredibly, incredibly lucky to live in a time where we have affordable access to technology that can realize our musical ideas to increasingly accurate degrees.
Jus' my 2 cents
- Sam