{"projection_revision":2,"snapshot":"b74778db4eb86886bf2a2888634fb96c","catalog_version":23356,"snapshot_created_at":"2026-10-01T10:50:41+00:00","snapshot_expires_at":"2026-10-02T10:50:41+00:00","source_changed_at":"2026-10-01T10:49:28+00:00","freshness_behavior":"materialized on first request after a committed source change; database triggers cover row writes and relationship writes","source_id_sha256":"5c248e39144e07fbe53310a1468b220806b0062f8345033a16ab0720c793cc1e","source_content_sha256":"94e11b0636bb192bc29575e96afc0a2f9a1ddfd7b00fd2baebb41c656e61a37c","total_catalog_pieces":6525,"schema_version":"2.0","query":"","normalized_query":"","resolved_filters":{"piece_id":3992,"timezone":"UTC"},"sort":"relevance","projection":"full","total_matches":1,"returned":1,"page":1,"per_page":50,"total_pages":1,"previous_page_url":null,"next_page_url":null,"end_of_results":true,"alternate_formats":{"html":"https://roadtovirtuosity.com/ai/catalog/pieces/3992?page=1&piece_id=3992&projection=full&snapshot=b74778db4eb86886bf2a2888634fb96c","json":"https://roadtovirtuosity.com/ai/catalog/pieces/3992.json?page=1&piece_id=3992&projection=full&snapshot=b74778db4eb86886bf2a2888634fb96c","text":"https://roadtovirtuosity.com/ai/catalog/pieces/3992.txt?page=1&piece_id=3992&projection=full&snapshot=b74778db4eb86886bf2a2888634fb96c"},"warnings":["Strict taxonomy filters exclude unattributed records; search title text separately before deciding something is missing.","Work identity, musical sequence and completeness are unknown unless reviewed metadata is supplied. Catalog collections are existing subcategory groupings.","Historical first-publication dates are unknown. Date counts include only currently public entries with known first-publication dates.","File availability reports a public file reference, not a storage-health check."],"publication_count_scope":"currently public entries first published during the requested interval","unknown_publication_dates_before_date_filter":1,"distinct_work_count":null,"approximate_suggestions":[],"message":null,"pieces":[{"piece_id":3992,"title":"Schumann - Spring Song - Op. 68, No. 15","composer":["Schumann, Robert"],"composers":[{"id":84,"name":"Schumann, Robert"}],"instrument":["Piano"],"instruments":[{"id":1,"name":"Piano"}],"genre":"Romantic","genre_id":3,"is_archive_only":false,"evaluation_eligible":true,"points":12500,"level":5,"canonical_url":"https://roadtovirtuosity.com/schumann-op-68-no-15-spring-song","instrument_points":[{"instrument_id":1,"instrument":"Piano","points":12500}],"collections":[],"collection_semantics":"existing catalog subcategory grouping","work_identifiers":[],"work_id":null,"book":null,"sequence_position":null,"movement_number":null,"movement_title":null,"key":null,"arrangement":null,"edition":null,"entry_scope":null,"completeness":"unknown","reviewed_enrichment":false,"availability_label":"Non-Commercial","has_download":true,"download_availability_basis":"public license category and existing file reference; storage health not verified","description":"Spring Song is an intimate E-major piece with a gently swaying 6/8 rhythm. Paired notes, dotted figures, and delicately shifting inner voices give its melody a warm, expressive color.\r\nThe opening phrases recur with small changes in harmony and bass movement. A contrasting passage thins the texture, letting broken figures pass between registers before a hushed chordal exchange. The principal melody returns more fully, and later recollections of both ideas lead into an expanded, quietly settling close.\r\nInteresting fact: Schumann marks the hushed passage una corda and its return to fuller sound tre corde, making changes of piano color part of the written design.","created_at":"2026-02-16T20:00:16+00:00","first_published_at":null,"published_at":null,"updated_at":"2026-09-23T04:50:38+00:00","match_basis":"filters"}],"latest_catalog_version":23356,"source_lag_revisions":0}