@inproceedings{lei-etal-2026-one,
title = "One-Stage Multi-Task Instruction-Guided 3{D} Spatial Audio Editing",
author = "Lei, Ke and
Wen, Chenyuhao and
Zhang, Yu and
Guo, Wenxiang and
Pan, Changhao and
Zhou, Sashuai and
Li, Yongshi and
Li, Ruiqi and
Hu, Ruofan and
Xu, Haorui and
Yin, Xiang and
Zhao, Zhou",
editor = "Lee, Hung-Yi and
Dev, Sunipa and
Li, Jessy and
Elliott, Desmond",
booktitle = "Findings of the {A}ssociation for {C}omputational {L}inguistics: {EMNLP} 2026",
month = oct,
year = "2026",
address = "Budapest, Hungary",
publisher = "Association for Computational Linguistics",
url = "https://aclanthology.org/2026.findings-emnlp.962/",
pages = "20355--20369",
ISBN = "979-8-89176-462-0",
abstract = "Spatial audio editing modifies an existing soundfield according to a user{'}s instruction while preserving the rest of the scene. Unlike conventional audio editing, it must reason jointly about audio events, spatial information, dynamic changes, and environmental information in first-order Ambisonic (FOA) waveforms. Existing language-guided editors mainly target conventional audio or rely on sequential operations, and therefore do not directly support one-stage editing for complex 3D spatial instructions. We present SwanWeave, the first one-stage multi-task framework for instruction-guided 3D FOA spatial audio editing. We build paired FOA supervision from open-source speech and sound-effect corpora using controllable room simulation, covering more than ten single-operation and compound tasks across the four editing axes. To handle this heterogeneous edit space, SwanWeave uses Spatial Edit Mixture-of-Experts (SE-MoE) with dual-level routing, selecting task-aware expert combinations for compound instructions and frame-level routed/null experts for local edit decisions. We further introduce Spatial Preference Optimization (SPO), a Direct Preference Optimization (DPO)-based alignment objective with edit-specific negative targets, and adopt staged training to improve natural-language grounding. Experiments show that SwanWeave achieves better editing quality than existing general audio editors and spatial audio baselines across all tasks. Spatial audio editing demos can be found at https://swanaigc.github.io/{\#}swanweave, code can be found at: https://github.com/MM-Speech/SwanWeave."
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<abstract>Spatial audio editing modifies an existing soundfield according to a user’s instruction while preserving the rest of the scene. Unlike conventional audio editing, it must reason jointly about audio events, spatial information, dynamic changes, and environmental information in first-order Ambisonic (FOA) waveforms. Existing language-guided editors mainly target conventional audio or rely on sequential operations, and therefore do not directly support one-stage editing for complex 3D spatial instructions. We present SwanWeave, the first one-stage multi-task framework for instruction-guided 3D FOA spatial audio editing. We build paired FOA supervision from open-source speech and sound-effect corpora using controllable room simulation, covering more than ten single-operation and compound tasks across the four editing axes. To handle this heterogeneous edit space, SwanWeave uses Spatial Edit Mixture-of-Experts (SE-MoE) with dual-level routing, selecting task-aware expert combinations for compound instructions and frame-level routed/null experts for local edit decisions. We further introduce Spatial Preference Optimization (SPO), a Direct Preference Optimization (DPO)-based alignment objective with edit-specific negative targets, and adopt staged training to improve natural-language grounding. Experiments show that SwanWeave achieves better editing quality than existing general audio editors and spatial audio baselines across all tasks. Spatial audio editing demos can be found at https://swanaigc.github.io/#swanweave, code can be found at: https://github.com/MM-Speech/SwanWeave.</abstract>
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%0 Conference Proceedings
%T One-Stage Multi-Task Instruction-Guided 3D Spatial Audio Editing
%A Lei, Ke
%A Wen, Chenyuhao
%A Zhang, Yu
%A Guo, Wenxiang
%A Pan, Changhao
%A Zhou, Sashuai
%A Li, Yongshi
%A Li, Ruiqi
%A Hu, Ruofan
%A Xu, Haorui
%A Yin, Xiang
%A Zhao, Zhou
%Y Lee, Hung-Yi
%Y Dev, Sunipa
%Y Li, Jessy
%Y Elliott, Desmond
%S Findings of the Association for Computational Linguistics: EMNLP 2026
%D 2026
%8 October
%I Association for Computational Linguistics
%C Budapest, Hungary
%@ 979-8-89176-462-0
%F lei-etal-2026-one
%X Spatial audio editing modifies an existing soundfield according to a user’s instruction while preserving the rest of the scene. Unlike conventional audio editing, it must reason jointly about audio events, spatial information, dynamic changes, and environmental information in first-order Ambisonic (FOA) waveforms. Existing language-guided editors mainly target conventional audio or rely on sequential operations, and therefore do not directly support one-stage editing for complex 3D spatial instructions. We present SwanWeave, the first one-stage multi-task framework for instruction-guided 3D FOA spatial audio editing. We build paired FOA supervision from open-source speech and sound-effect corpora using controllable room simulation, covering more than ten single-operation and compound tasks across the four editing axes. To handle this heterogeneous edit space, SwanWeave uses Spatial Edit Mixture-of-Experts (SE-MoE) with dual-level routing, selecting task-aware expert combinations for compound instructions and frame-level routed/null experts for local edit decisions. We further introduce Spatial Preference Optimization (SPO), a Direct Preference Optimization (DPO)-based alignment objective with edit-specific negative targets, and adopt staged training to improve natural-language grounding. Experiments show that SwanWeave achieves better editing quality than existing general audio editors and spatial audio baselines across all tasks. Spatial audio editing demos can be found at https://swanaigc.github.io/#swanweave, code can be found at: https://github.com/MM-Speech/SwanWeave.
%U https://aclanthology.org/2026.findings-emnlp.962/
%P 20355-20369
Markdown (Informal)
[One-Stage Multi-Task Instruction-Guided 3D Spatial Audio Editing](https://aclanthology.org/2026.findings-emnlp.962/) (Lei et al., Findings 2026)
ACL
- Ke Lei, Chenyuhao Wen, Yu Zhang, Wenxiang Guo, Changhao Pan, Sashuai Zhou, Yongshi Li, Ruiqi Li, Ruofan Hu, Haorui Xu, Xiang Yin, and Zhou Zhao. 2026. One-Stage Multi-Task Instruction-Guided 3D Spatial Audio Editing. In Findings of the Association for Computational Linguistics: EMNLP 2026, pages 20355–20369, Budapest, Hungary. Association for Computational Linguistics.