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Miguel ÁngelandClaude Sonnet 4.6
ac73cbbcd0
Audio elements inside sub-compositions on the root timeline were ignoring their host composition's data-start placement offset in the WebAudio scheduling path (introduced in #671 / v0.5.4). All sub-comp audio was scheduled with compositionStart equal to its local data-start (typically 0), causing every slide's audio to fire simultaneously at global t=0 instead of at each slide's placement time. Root cause: two sites in the WebAudio path read rawEl.dataset.start directly instead of accounting for the [data-composition-id] ancestor's data-start: 1. player.play() — WebAudioTransport.schedulePlayback() compositionStart arg 2. transportTick — TransportClock.attachAudioSource() compositionStart arg The syncRuntimeMedia path (HTMLMediaElement fallback) was already correct because syncMediaForCurrentState uses resolveMediaCompositionContext which sums the host offset into the clip's start time. Fix: add resolveGlobalAudioStart() that walks up [data-composition-id] ancestors and sums their resolveStartForElement() offsets. Handles nested sub-compositions. Apply it at both broken call sites. Fixes #1174. Co-authored-by: Claude Sonnet 4.6 <noreply@anthropic.com>