what is you view of what distinguishes music from "sound representations" (of, say, a walk, or a formula, or a set of numbers, or an algorithm)?
Blimey, that strikes to the heart of what I do. In staging operas we're involved in "deconstruction" of exactly these ideas... trying to extrapolate the real actions and pictures which inspired a particular musical response from a specific composer. It's a completely tendentious business in which one is walking the highwire with no safety-net... it's purely the Director's own belief that he "hears" an action, or movement, or a change of lighting or mood, in a particular moment in the music. If challenged, the only defence is "well, surely you can hear it, can't you?" - because there's nothing else. But it's all there is to go on.
I'll give a particular example which might hopefully be well-known to most. In WALKURE Act III, everything that happens once Brunnhilde has confessed to assisting Sieglinde's escape is a colossal musical and emotional crescendo, leading to a particular moment. Wotan is clearly aware that he's letting Brunnhilde take the rap for his own transgressions, catching her on a technicality... and there is also an unspoken agreement that "she knows that he knows", and she's ready to take the fall for him. When he's already put her on the rock (
pace the stage-directions) we finally reach the culmination of this near-unbearable crescendo in a massive chord of emotional release...
but there is no stage-direction to indicate what it means. Personally I think it's obvious what it means - having already turned-away from her and beginning to climb off the rock, either she, or he, rushes forwards for a last embrace, in a moment which says everything that may not be said in words. However... I have seen three different productions of the opera in which nothing... absolutely nothing... happens at this moment? It's as though the stage-director was deaf to what was happening in the music, and was just mechanically fulfilling what the stage-directions say, and that alone? (I think it's significant that two of the directors involved in my list of three had no musical background. The third, I'm afraid, was Gergiev, who mistakenly believed he could stage operas as well as conduct them).
It is, of course, an act of the most colossal arrogance to take upon onesself responsibility for telling the audience what - in your opinion - each passage of music is supposed to represent, and it's a responsibility I have a lot of trouble with. (One thing is for sure - whatever you do won't be right. I bet even Wagner was told he'd misinterpreted the composer's intentions).
the nature sound FX in Beethoven's Pastoral. Lenny justified
his thesis that the Pastoral is first and foremost abstract music
I'd contend that although we can use period instruments, what we can never do is fit ourselves with "period ears". Many references in works like the Pastoral are lost to us. To give a different example, look at the music which opens the second section of Bach's Christmas Oratorio - a "pastorale" for a six-part ensemble of 2 x oboes, 2 x tenor oboes, and 2 x bassoons, alternating with the string section on the repeats. Why? Because it's a musical impersonation of the Italian zampogna and bombarde bands. The zampogna is a huge baritone-pitched bagpipe with two chanters, one played with each hand, and it bumbles along rather pleasantly in parallel sixths (which is all it can really do, considering each hand can only play a max of four notes, there's no thumbhole or you'd drop the thing) while the bombarde (a kind of shawm that's a bit softer than its catalan cousin) plays the melody, or maybe a melody in parallel thirds if there are two players. So the bassoons mimic the bagpipe open-fifith drones, the tenor oboes do the zampogna stuff, and the oboes play the melody. What we DON'T hear is that to the C18th ear, this was the iconic sound of Christmas in the same way that Frank Sinatra or Noddy Holder are now... because these zampogna bands were made up of shepherds, who were laid-off by the farmers once the sheep were penned-up for the winter, so they went off busking... all around Europe, in fact. (There were reports of them being seen as far north as Edinburgh). The connection with "shepherds" and the sound of the Christmas Nativity was too good to miss. Handel couldn't resist including this sound in The Messiah at the point of the Nativity either, although he didn't attempt to mimic the bagpipe sounds with wind instruments, and stuck to the string group alone.
Which is all by way of saying that what WE hear as "abstract" music, might not have sounded that way to audiences of other cultures or generations