{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2021:DF55HVOZWC5CVPPPXXSCG2TLZ7","short_pith_number":"pith:DF55HVOZ","canonical_record":{"source":{"id":"2111.03600","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.AS","submitted_at":"2021-11-05T16:37:45Z","cross_cats_sorted":["cs.SD","stat.ML"],"title_canon_sha256":"8b0112ac9e55ce0ce411ef9354e313c2ece0a50d6ea203ac1bd11e115b516c14","abstract_canon_sha256":"f16b93eb353f227a11784ee2618cce67e02c0115d34966a399994c39242fa9de"},"schema_version":"1.0"},"canonical_sha256":"197bd3d5d9b0ba2abdefbde4236a6bcffe5719dd006550323c66177a29d19fee","source":{"kind":"arxiv","id":"2111.03600","version":3},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2111.03600","created_at":"2026-07-05T04:52:36Z"},{"alias_kind":"arxiv_version","alias_value":"2111.03600v3","created_at":"2026-07-05T04:52:36Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2111.03600","created_at":"2026-07-05T04:52:36Z"},{"alias_kind":"pith_short_12","alias_value":"DF55HVOZWC5C","created_at":"2026-07-05T04:52:36Z"},{"alias_kind":"pith_short_16","alias_value":"DF55HVOZWC5CVPPP","created_at":"2026-07-05T04:52:36Z"},{"alias_kind":"pith_short_8","alias_value":"DF55HVOZ","created_at":"2026-07-05T04:52:36Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2021:DF55HVOZWC5CVPPPXXSCG2TLZ7","target":"record","payload":{"canonical_record":{"source":{"id":"2111.03600","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.AS","submitted_at":"2021-11-05T16:37:45Z","cross_cats_sorted":["cs.SD","stat.ML"],"title_canon_sha256":"8b0112ac9e55ce0ce411ef9354e313c2ece0a50d6ea203ac1bd11e115b516c14","abstract_canon_sha256":"f16b93eb353f227a11784ee2618cce67e02c0115d34966a399994c39242fa9de"},"schema_version":"1.0"},"canonical_sha256":"197bd3d5d9b0ba2abdefbde4236a6bcffe5719dd006550323c66177a29d19fee","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T04:52:36.855603Z","signature_b64":"jd++AnSbISfgvd9RmsGectMI3qOtaY9/c6tWg0T8jF6CmaXj09XAJReu4h88XGV6G6o1nHTODCeBMtQBUS4dCw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"197bd3d5d9b0ba2abdefbde4236a6bcffe5719dd006550323c66177a29d19fee","last_reissued_at":"2026-07-05T04:52:36.855191Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T04:52:36.855191Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2111.03600","source_version":3,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T04:52:36Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"XkQowkFhlJcebH83/9v3uy77vMwX1oovY+fa9LdPkc81KUwwmgePP0P6M3k/lvJCXFe7lre28/VZvDT8mqbiCA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-05T14:12:40.657136Z"},"content_sha256":"e75f8899b5fdce01acc4d6fdc8620235f04d20392650eb682bae8bc39b8bbcd6","schema_version":"1.0","event_id":"sha256:e75f8899b5fdce01acc4d6fdc8620235f04d20392650eb682bae8bc39b8bbcd6"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2021:DF55HVOZWC5CVPPPXXSCG2TLZ7","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Hybrid Spectrogram and Waveform Source Separation","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cs.SD","stat.ML"],"primary_cat":"eess.AS","authors_text":"Alexandre D\\'efossez","submitted_at":"2021-11-05T16:37:45Z","abstract_excerpt":"Source separation models either work on the spectrogram or waveform domain. In this work, we show how to perform end-to-end hybrid source separation, letting the model decide which domain is best suited for each source, and even combining both. The proposed hybrid version of the Demucs architecture won the Music Demixing Challenge 2021 organized by Sony. This architecture also comes with additional improvements, such as compressed residual branches, local attention or singular value regularization. Overall, a 1.4 dB improvement of the Signal-To-Distortion (SDR) was observed across all sources "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2111.03600","kind":"arxiv","version":3},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2111.03600/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T04:52:36Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"QkbJytHqHGWx3OyNfQlQGo7aS0gskHp1WN2rYX8m/QMyxAVgUqbE99DyrFo76uca1y2HdLW9HoD3+eInIesGCg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-05T14:12:40.657774Z"},"content_sha256":"9d0e39006ada221b6ac8a2ffdcb60ee5f3eced7e047b91aa881cbc409109d102","schema_version":"1.0","event_id":"sha256:9d0e39006ada221b6ac8a2ffdcb60ee5f3eced7e047b91aa881cbc409109d102"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/DF55HVOZWC5CVPPPXXSCG2TLZ7/bundle.json","state_url":"https://pith.science/pith/DF55HVOZWC5CVPPPXXSCG2TLZ7/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/DF55HVOZWC5CVPPPXXSCG2TLZ7/bundle.json","status":"primary"}],"public_keys":[{"key_id":"pith-v1-2026-05","algorithm":"ed25519","format":"raw","public_key_b64":"stVStoiQhXFxp4s2pdzPNoqVNBMojDU/fJ2db5S3CbM=","public_key_hex":"b2d552b68890857171a78b36a5dccf368a953413288c353f7c9d9d6f94b709b3","fingerprint_sha256_b32_first128bits":"RVFV5Z2OI2J3ZUO7ERDEBCYNKS","fingerprint_sha256_hex":"8d4b5ee74e4693bcd1df2446408b0d54","rotates_at":null,"url":"https://pith.science/pith-signing-key.json","notes":"Pith uses this Ed25519 key to sign canonical record SHA-256 digests. Verify with: ed25519_verify(public_key, message=canonical_sha256_bytes, signature=base64decode(signature_b64))."}],"merge_version":"pith-open-graph-merge-v1","built_at":"2026-07-05T14:12:40Z","links":{"resolver":"https://pith.science/pith/DF55HVOZWC5CVPPPXXSCG2TLZ7","bundle":"https://pith.science/pith/DF55HVOZWC5CVPPPXXSCG2TLZ7/bundle.json","state":"https://pith.science/pith/DF55HVOZWC5CVPPPXXSCG2TLZ7/state.json","well_known_bundle":"https://pith.science/.well-known/pith/DF55HVOZWC5CVPPPXXSCG2TLZ7/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2021:DF55HVOZWC5CVPPPXXSCG2TLZ7","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":"f16b93eb353f227a11784ee2618cce67e02c0115d34966a399994c39242fa9de","cross_cats_sorted":["cs.SD","stat.ML"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.AS","submitted_at":"2021-11-05T16:37:45Z","title_canon_sha256":"8b0112ac9e55ce0ce411ef9354e313c2ece0a50d6ea203ac1bd11e115b516c14"},"schema_version":"1.0","source":{"id":"2111.03600","kind":"arxiv","version":3}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2111.03600","created_at":"2026-07-05T04:52:36Z"},{"alias_kind":"arxiv_version","alias_value":"2111.03600v3","created_at":"2026-07-05T04:52:36Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2111.03600","created_at":"2026-07-05T04:52:36Z"},{"alias_kind":"pith_short_12","alias_value":"DF55HVOZWC5C","created_at":"2026-07-05T04:52:36Z"},{"alias_kind":"pith_short_16","alias_value":"DF55HVOZWC5CVPPP","created_at":"2026-07-05T04:52:36Z"},{"alias_kind":"pith_short_8","alias_value":"DF55HVOZ","created_at":"2026-07-05T04:52:36Z"}],"graph_snapshots":[{"event_id":"sha256:9d0e39006ada221b6ac8a2ffdcb60ee5f3eced7e047b91aa881cbc409109d102","target":"graph","created_at":"2026-07-05T04:52:36Z","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/2111.03600/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Source separation models either work on the spectrogram or waveform domain. In this work, we show how to perform end-to-end hybrid source separation, letting the model decide which domain is best suited for each source, and even combining both. The proposed hybrid version of the Demucs architecture won the Music Demixing Challenge 2021 organized by Sony. This architecture also comes with additional improvements, such as compressed residual branches, local attention or singular value regularization. Overall, a 1.4 dB improvement of the Signal-To-Distortion (SDR) was observed across all sources ","authors_text":"Alexandre D\\'efossez","cross_cats":["cs.SD","stat.ML"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.AS","submitted_at":"2021-11-05T16:37:45Z","title":"Hybrid Spectrogram and Waveform Source Separation"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2111.03600","kind":"arxiv","version":3},"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:e75f8899b5fdce01acc4d6fdc8620235f04d20392650eb682bae8bc39b8bbcd6","target":"record","created_at":"2026-07-05T04:52:36Z","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":"f16b93eb353f227a11784ee2618cce67e02c0115d34966a399994c39242fa9de","cross_cats_sorted":["cs.SD","stat.ML"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.AS","submitted_at":"2021-11-05T16:37:45Z","title_canon_sha256":"8b0112ac9e55ce0ce411ef9354e313c2ece0a50d6ea203ac1bd11e115b516c14"},"schema_version":"1.0","source":{"id":"2111.03600","kind":"arxiv","version":3}},"canonical_sha256":"197bd3d5d9b0ba2abdefbde4236a6bcffe5719dd006550323c66177a29d19fee","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"197bd3d5d9b0ba2abdefbde4236a6bcffe5719dd006550323c66177a29d19fee","first_computed_at":"2026-07-05T04:52:36.855191Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T04:52:36.855191Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"jd++AnSbISfgvd9RmsGectMI3qOtaY9/c6tWg0T8jF6CmaXj09XAJReu4h88XGV6G6o1nHTODCeBMtQBUS4dCw==","signature_status":"signed_v1","signed_at":"2026-07-05T04:52:36.855603Z","signed_message":"canonical_sha256_bytes"},"source_id":"2111.03600","source_kind":"arxiv","source_version":3}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:e75f8899b5fdce01acc4d6fdc8620235f04d20392650eb682bae8bc39b8bbcd6","sha256:9d0e39006ada221b6ac8a2ffdcb60ee5f3eced7e047b91aa881cbc409109d102"],"state_sha256":"8c23d80efc2fd27223684c0773f05cac69088c9f05419cf91a7dac62848fb3e1"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"9eJ8eX7+iOhNbutKWjF0u5SVsCSbIcnbEXRxow+ocQypChPWCh79GHVv7B6tKuEf/Rqc7sLK4bqjINucpSkHAw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-05T14:12:40.661270Z","bundle_sha256":"5e5c56114ad17fe265862234af6024ad4cee24675615e4b6d348e41fe8ac1f83"}}