{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2026:Z5S7K4WY45B5J4HCTKRASM23LG","merge_version":"pith-open-graph-merge-v1","event_count":2,"valid_event_count":2,"invalid_event_count":0,"equivocation_count":0,"current":{"canonical_record":{"metadata":{"abstract_canon_sha256":"6c808a1975c0d37ef15571fde7eb792b89cdd2b2c87a2c20b92adc8edd9d2495","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.AS","submitted_at":"2026-06-15T10:55:02Z","title_canon_sha256":"e75a8e3d36d86fd7dfca892ea1ad9f5e7ecdb771a35da870ec3a226143c929fd"},"schema_version":"1.0","source":{"id":"2606.16551","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2606.16551","created_at":"2026-07-02T01:17:33Z"},{"alias_kind":"arxiv_version","alias_value":"2606.16551v2","created_at":"2026-07-02T01:17:33Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2606.16551","created_at":"2026-07-02T01:17:33Z"},{"alias_kind":"pith_short_12","alias_value":"Z5S7K4WY45B5","created_at":"2026-07-02T01:17:33Z"},{"alias_kind":"pith_short_16","alias_value":"Z5S7K4WY45B5J4HC","created_at":"2026-07-02T01:17:33Z"},{"alias_kind":"pith_short_8","alias_value":"Z5S7K4WY","created_at":"2026-07-02T01:17:33Z"}],"graph_snapshots":[{"event_id":"sha256:55324d919457227f70f37cc59f539eb5a0e07588a62bbf9fa46405d4a7b286c0","target":"graph","created_at":"2026-07-02T01:17:33Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"graph_snapshot":{"author_claims":{"count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","strong_count":0},"builder_version":"pith-number-builder-2026-05-17-v1","claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/2606.16551/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Microphone bleed is a persistent challenge in small ensembles and orchestral recordings, where close microphones intended for individual instruments also capture leakage from nearby sources. This overlap degrades track isolation and complicates mixing. This paper addresses the bleeding problem by making channel-permutation-equivariance a core learning principle. During training, we apply the same random permutation to the input microphone channels and their corresponding reference targets. This discourages reliance on fixed channel-instrument associations and improves robustness to changes in ","authors_text":"David Diaz-Guerra, Jaime Garcia-Martinez, Julio J. Carabias-Orti, Pablo Cabanas-Molero, Pedro Vera-Candeas, Ricardo Falcon Perez, Ruchi Pandey, Tuomas Virtanen","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.AS","submitted_at":"2026-06-15T10:55:02Z","title":"Learning Input-Channel Permutation Equivariance for Multi-Channel Source Separation: Reducing Bleeding in Small Music Ensembles"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2606.16551","kind":"arxiv","version":2},"verdict":{"created_at":null,"id":null,"model_set":{},"one_line_summary":"","pipeline_version":null,"pith_extraction_headline":"","strongest_claim":"","weakest_assumption":""}},"verdict_id":null}}],"author_attestations":[],"timestamp_anchors":[],"storage_attestations":[],"citation_signatures":[],"replication_records":[],"corrections":[],"mirror_hints":[],"record_created":{"event_id":"sha256:d3bb31edb13146a6b963ebf94d782539d8e57b86a74daff1e738362defe0a0f1","target":"record","created_at":"2026-07-02T01:17:33Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"attestation_state":"computed","canonical_record":{"metadata":{"abstract_canon_sha256":"6c808a1975c0d37ef15571fde7eb792b89cdd2b2c87a2c20b92adc8edd9d2495","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.AS","submitted_at":"2026-06-15T10:55:02Z","title_canon_sha256":"e75a8e3d36d86fd7dfca892ea1ad9f5e7ecdb771a35da870ec3a226143c929fd"},"schema_version":"1.0","source":{"id":"2606.16551","kind":"arxiv","version":2}},"canonical_sha256":"cf65f572d8e743d4f0e29aa209335b598b06d3c5b64484b08b2234903814e679","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"cf65f572d8e743d4f0e29aa209335b598b06d3c5b64484b08b2234903814e679","first_computed_at":"2026-07-02T01:17:33.326766Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-02T01:17:33.326766Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"lggmwYOnnOPv/JvHdB1bAe0bHvfiDT6U7ykMq0dQqmLBVxkj3v3G8EcFc6uLD1t7cmsJueVo//Pu0tlNaxmlBg==","signature_status":"signed_v1","signed_at":"2026-07-02T01:17:33.327240Z","signed_message":"canonical_sha256_bytes"},"source_id":"2606.16551","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:d3bb31edb13146a6b963ebf94d782539d8e57b86a74daff1e738362defe0a0f1","sha256:55324d919457227f70f37cc59f539eb5a0e07588a62bbf9fa46405d4a7b286c0"],"state_sha256":"e5e0bb271a7024917ed83b64a6abe95724fd97c9eac5627e3e4128e4286b1363"}