Notes — David Robertson on Conducting, Pierre Boulez, and Musical Interpretation

Notes on David Robertson in conversation with Tyler Cowen — Conversations with Tyler (https://conversationswithtyler.com/episodes/david-robertson/), 9 July 2025 (recorded 12 March 2025, days before Pierre Boulez’s centenary).

Four questions [Adler frame]

Q1 — What is it about as a whole? A practising conductor’s account of two things held together: what Pierre Boulez was actually like — as composer, performer, and near-mentor — and what the craft of conducting consists of once you strip away the myth of a man imposing his will with a stick. Robertson, who ran Boulez’s Ensemble Intercontemporain for nine years without having studied under him, uses the composer’s centenary as the spine, then radiates out to interpretation, the notation of rhythm, why contemporary classical music repels people, the conductor’s real skills (listening, eye contact, looking foolish), clarity of sound, what conductors should read, and finally why he insists on the 1911 Petrushka over Stravinsky’s 1947 revision.

Q2 — How is it argued? Almost entirely from lived incident rather than doctrine. Robertson reasons from specific rehearsals (recalculating a tempo live with Boulez and a MIDI flute; the 293rd performance of Le Marteau sans maître being his first) to general claims about how music works. His recurring move is to reframe an apparent opposition — precision versus emotion, contemporary versus dated, conductor’s authority versus the players’ — as a false one, usually by attending to what a particular person or score actually does rather than to the category it belongs to.

Q3 — Is it true, in whole or part? On the biographical specifics — the Explosante-fixe premiere, the ‘Iceman Cometh’ headline, Boulez’s steel-drum encounter in the Caribbean, the Petrushka copyright history — Robertson is a first-hand witness and the claims are plausible and internally consistent. His interpretive claims (that Boulez welcomed emotion in his works while being unable to supply it himself as a performer; that clarity comes from hearing the result precisely in your head first) are argued from experience rather than proven, and he flags his own biases openly, e.g. his prejudice against ‘ultra-complex’ music. [?] His secondhand science (the reading-and-dyslexia argument from Maryanne Wolf’s Proust and the Squid, the Kahneman System 1/System 2 framing) is illustrative analogy, not evidence he vouches for technically.

Q4 — What of it? A transferable model of leadership through listening rather than command — Robertson explicitly links conducting to his father’s late-career management of brilliant scientists — and a working philosophy of interpretation: take a creator’s marks in good faith, assume every detail is deliberate, and make it audible. It gives the wiki its first deep treatment of orchestral conducting and contemporary classical music, and a concrete case of the craft-mastery-through-apprenticeship theme.

Glossary

Serialism — a mid-20th-century compositional method (associated with Boulez) that orders the twelve pitches, and often rhythm and dynamics too, by a fixed governing sequence rather than by a home key. Cowen probes whether Boulez is better heard as a ‘surrealist’ — emotion smuggled under a rigorous surface — than as a dry serialist. [§ On Pierre Boulez]

Ensemble Intercontemporain — the Paris ensemble Boulez founded to specialise in new music, built as a group of 31 soloists each contracted (like an orchestra’s principal players) to play only about two-thirds of the time so they could stay in top form. Robertson was its music director 1992–2000, the first American in the post. [§ On the skills of conducting]

Mosaic form — a way of building a piece from short, self-contained blocks of material set side by side, so patterns shift abruptly rather than developing continuously; Robertson cites Explosante-fixe. It is why such scores resist a steady bar-by-bar ‘grid’. [§ On non-Western influences in Boulez’s music]

The grid — the underlying steady pulse a listener measures music against; anything off it registers as syncopation. Robertson contrasts jazz (which generates energy by pushing and pulling against the grid) with Boulez passages that cannot be forced into strict metre without crushing them ‘like a beautiful flower into a little glass case’. [§ On non-Western influences in Boulez’s music]

MIDI flute — a flute rigged to send performance data to a computer, so a live player can trigger and shape electronic sound in real time. Robertson conducted Explosante-fixe with the computer recalculating tempo on the fly from the flute’s signal. [§ On Pierre Boulez]

By heart vs from memory — Robertson’s distinction: playing ‘from memory’ is mechanical recall; playing ‘by heart’ means the music matters so deeply you could no more forget it than forget a parent’s name. He prefers the latter as the goal even for the most complex contemporary scores. [§ On the skills of conducting]

Clarity of sound — an audible transparency in which each written line can be heard, distinct from the raw quality of the orchestra. Boulez’s stated method, which Robertson adopts: hear exactly what you want in your head, and you will instinctively do whatever balancing is needed to produce it. [§ On achieving clarity of sound]

Petrushka 1911 vs 1947 — the original and revised versions of Stravinsky’s ballet. Robertson insists on the 1911: the later revision thinned the orchestration and simplified hard tempo relations (partly, he suspects, so Stravinsky could conduct and earn from it), losing the Rimsky-Korsakov colour. [§ On what conductors should read]

Key claims by section

On Pierre Boulez [§ On Pierre Boulez]

Robertson never formally studied with Boulez; he describes their bond as ‘grandfilial’ — a grandfather’s forgiving distance — and he was handed the Ensemble Intercontemporain despite almost no prior contact and never having conducted the group.
Boulez’s ‘Iceman’ reputation (a New York headline: ‘The Iceman Cometh’) came from his refusal to wear emotion on his sleeve and his emphasis on precision as a performer; Robertson never saw that coldness in the man.
The key insight: Boulez welcomed intense emotion being put into his works by others — at a Tokyo performance of Explosante-fixe Robertson took a slow passage to nearly double the marked slowness and Boulez said ‘you can actually do more’ — but was himself unable to supply that emotion as a performer. [?] Robertson infers this asymmetry rather than being told it outright.
Composers hearing their own work performed get nervous, like sending a child onto the Little League field, and tend to push it faster or harder; sitting and listening gives a different experience than being ‘in the driver’s seat’.

On non-Western influences in Boulez’s music [§ On non-Western influences in Boulez’s music]

Robertson prepares for the non-Western colours in Boulez (gamelan connotations, steel drums in Sur Incises and the 7th Notation) by both listening to the source music and focusing on Boulez — ‘both’ is the answer.
The steel drums trace to Boulez as a young man running the musical side of the Renaud-Barrault theatre company, touring post-war on French-government cultural missions; he heard steel-drum players on a Caribbean beach before mass tourism, and the sound stayed with him.
This is a wider French-composer pattern (a gamelan at the Paris Exposition; African masks reaching Picasso and Braque and Cubism): Boulez’s music is built on constant attention and listening — Scottish bagpipe chanter ornaments, for instance — folded into his own writing.
Boulez’s shifting time signatures reflect a real choice between two notational logics: subdividing a fixed span of time, versus building from an underlying pulse of small equal notes (a logic Robertson traces to the Indian subcontinent, via Messiaen). Forcing the second into a metric grid turns everything off-grid into false syncopation.

On why to listen to contemporary classical music [§ On why to listen to contemporary classical music]

Robertson’s pitch: every artist has a unique way of viewing the world formed by their particular experience (he cites his own residual habit, as a ‘recovering horn player’, of hearing overtone structure), and expresses it through music, hoping to say something not said before.
‘Contemporary’ is a movable feast: the same 1950s Boulez sonata can strike one listener as cutting-edge and another, steeped in 60 years of new music, as dated. Robertson’s aim with any piece, whatever its date, is to make it speak to us now.
People’s tolerance of contemporary music maps onto their ‘comfort with discomfort’; some genuinely prefer consonance, others feel consonant music today is a ‘cop out’ because reality is a trickier, nastier beast that needs an un-apologetic musical language (Cowen puts himself in the second camp).
He uses a ‘mixtape’ of ~2.5-second clips (reggae, AC/DC, Springsteen, a Schubert lied, gamelan, kabuki, sitar) to show trainee conductors how fast the brain decides ‘for me / not for me’ — a fact performers and programmers must design around; he front-loads Explosante-fixe with its gentle ending to give newcomers context before the ‘airport runway’ onslaught.
For a skeptic, start with Mémoriale — five minutes, delightful sound world (solo flute, small strings, two horns), and a strong emotional charge, written as a memorial for a young Ensemble flautist who had helped develop the MIDI flute.

On the skills of conducting [§ On the skills of conducting]

A conductor doesn’t make players feel better by force; the music does that. The conductor’s job is to reflect a great moment back to the room — there’s an unwritten rule that players don’t turn to look at a colleague who played beautifully, so the podium becomes the place that recognition is broadcast from.
Every player looks up at a different, personal moment; the conductor must learn each one, because that upward glance is the open ‘window’ through which a gesture or expression can land (‘if the window is closed, you’ll pay for the pane of glass’). The under-noticed truth: almost everyone also looks up after playing, to check they are in the right place — a private moment the conductor can use to send ‘that was incredible’.
A second, less obvious skill: being comfortable looking slightly foolish (the ‘moon view’ — an alien seeing one person waving a stick while everyone else saws at instruments realises the silent one looks ridiculous). Not taking oneself too seriously is hard for some musicians.
What managers can learn from conductors: ‘you can only do your job by listening.’ It looks like imposing will; it is not. Robertson analogises to his father, a research engineer who late in life managed brilliant scientists who couldn’t work together — the job is harnessing collective artistry toward one direction, across decisions from tomorrow’s rehearsal order to a tenure that outlasts you by 40 years.
The nine years with the Ensemble Intercontemporain were formative because it was 31 soloists who taught him each instrument from the inside (fingerings, circular breathing, string positions) — knowledge he now carries to other orchestras; he owes most of what he knows to those players.
He prefers to conduct even complex Boulez ‘by heart’ rather than ‘from memory’.

On achieving clarity of sound [§ On achieving clarity of sound]

Robertson once asked Boulez how he got such clarity; the answer — prefaced, as ever, with ‘it’s very simple’ — was: hear exactly what you want in your head, and you will instinctively do what’s necessary to make it audible.
Robertson extends this from the interpreter’s side: take the composer’s reams of detail (John Adams’s phrase) in good faith, assume nothing is willful, and therefore make sure every written line is heard — if Berlioz writes four bassoons under fortissimo trombones, your job is to ensure the bassoons aren’t effectively silenced.
The governing principle: every player, like every soloist in an ensemble, is equally important and their viewpoints equally valid; the conductor synthesises all of it into a unified whole with maximum clarity.

On what conductors should read [§ On what conductors should read]

Robertson struggled to read as a child (before dyslexia was widely discussed) and found his way in through plays, whose white space let him process text and imagine the scene; he cites Maryanne Wolf’s Proust and the Squid on how some brains must build entirely new neural pathways to read, as certain squid must to swim.
His Juilliard reading list is deliberately wide and mostly non-musical: he assumes Charles Rosen’s The Classical Style and an orchestration book, and sets George Steiner’s After Babel (on translation — what carries across and what is lost), Words We Use, Lakoff and Johnson’s Metaphors We Live By, and Kahneman’s Thinking, Fast and Slow.
He reads conducting through Kahneman: most of the work is System 1 crunching data, while System 2 arrives ~50 milliseconds late still believing it’s in charge (he likens this to Yes Minister).
On the smartphone generation of young conductors (‘I’m going to boomer here’): the real challenge for classical music is long form against a scarce resource, attention; the remedy is to slow down and learn about oneself, through books and contemplation of the score.
What he loves in popular music is surprise — Tracy Chapman alone, J Dilla’s humanised rhythm-machine lilt, a Joni Mitchell or John Mayer chord voicing; he refuses earbuds on the street because random sound (a bird in a lull, two squeaking brakes) can have a ‘butterfly effect’, shuffling the mental jukebox. Music, he says, collapses time, space, and the distance between souls.
Audiences differ by culture (European applause far outlasts American), but the deeper truth is that any audience is a collection of individuals — someone bereaved, someone newly in love, someone who liked making strange sounds on their childhood instrument — and the job is to build an experience open enough for each to enter.

On what conductors should read [§ On what conductors should read] — Petrushka and trusting the original

Robertson conducts the 1911 Petrushka, not the 1947 revision. The revisions across Stravinsky’s output were driven partly by practicality and heavily by copyright and money — post-war, Stravinsky revised works to secure rights he’d lost (the much-played Firebird had earned him almost nothing).
The 1947 version thins the woodwind, cuts the harps to one, simplifies awkward tempo relations (a 7-in-the-time-of-6 passage flattened to eighth-equals-eighth), and, Robertson suspects, was made partly so Stravinsky could conduct it himself and earn from it. He finds the simplification ‘a very sad way of doing things’.
Boulez told him, ironically given his own lifelong habit of revising his works, that with a composer’s output you should ‘always trust the original’ — yet Boulez would never send you back to the original of Le Visage nuptial. Robertson holds both truths: sometimes a composer really did mark a tempo too fast, and revision is honest practicality.
The 1911’s colours and its Rimsky-Korsakov-rooted orchestration are clearer and more beautiful; he plays it with the New York Philharmonic in November 2025.