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| beam | Beam: free-free ends in the page (Ends 'free'; rigid part of strikes removed and reported; mode displays by Modes.count; bending offsets for ghost and Lyapunov shadow; drawing without supports) | |
| common | Plate: stretching with free edges (free in-plane edge, clamped stress function by sine solves + Woodbury); free plate moved to grid vertices (edge masses on the edge, half/quarter mass), second-order bending and stretching; mallet takes per-mass masses | |
| double-pendulum | Spectrogram: log frequency axis by default with a 'log f' chip for linear; rows show the loudest bin in their band; mode lines decided per line | |
| fput-chain | Anti-alias filter for rendered notes (beam, fput-chain): 4x oversampling, Kaiser FIR low-pass to 0.42 fs, decimation; beam warning now says modes above the passband are filtered out | |
| plate | Plate: remove membrane tension (did not sound like a drum; drums later); clamped edges stay | |
| index.html | Plate: remove membrane tension (did not sound like a drum; drums later); clamped edges stay | |