Inside Sonata.
The chessboard supplies the situation. Pieces carry recurring identities. The arrangement turns them into a performance.
What you can hear now
ChessJammer's Classical recorded-game soundtrack combines sampled grand piano, two-handed writing, inner voices and orchestral responses. Captures, threats and sustained king danger shape the performance. The scene director selects and spaces existing orchestral material.
Recorded clock data is used where available. Untimed games use simulated pacing, which is not a claim about the players' historical thinking times.
Three parts of the musical design
- Identity: recurring material lets a piece remain recognizable as the position changes.
- Interaction: captures and tactical events bring different identities into the same musical moment.
- Performance: piano writing and selective orchestration provide continuity, contrast and space.
What we are investigating
Separate studies examine initiative, persistent defensive obligations and changes in the relationships between pieces. Geometric influence, legal capture availability and engine-supported continuations are different levels of evidence. A narrow reply or an attacked piece does not automatically establish initiative.
Those studies remain experimental and are not yet public-demo musical controls. Future papers and listening studies will distinguish implemented behavior from proposals.
The piano
The current sampled piano uses an adapted Salamander Grand Piano v3 set. Credits and license information accompany the demo. Improving the instrument, its musical writing and its place in the mix are separate questions.
This page is a technical overview, not a peer-reviewed paper or the internal implementation specification.