Had this issue when trying a test for a simple project

As I tried to enhance an audio file from a video recorded in a classroom (already submited the extracted audio), the following error emerged as I tried to make a test using the Sample Mode. Would be truly gratefull if some help could be provided in solving this. In the meantime I'll try some AI asking as well and if I get some success with this, realy hope this info can help improve the application in the future.

Sincerely thankfull to the existence of this app. It'll be a lifesaver in the coming tryings of amateur recordings.

`Last Error Received:

Process: Demucs

If this error persists, please contact the developers with the error details.

Raw Error Details:

RuntimeError: "" Traceback Error: " File "UVR.py", line 9217, in process_start File "separate.py", line 1078, in seperate File "separate.py", line 1223, in demix_demucs File "demucs\apply.py", line 196, in apply_model File "demucs\apply.py", line 222, in apply_model File "demucs\apply.py", line 256, in apply_model File "demucs\\utils.py", line 490, in result File "demucs\apply.py", line 271, in apply_model File "torch\nn\modules\module.py", line 1501, in _call_impl File "demucs\htdemucs.py", line 576, in forward File "torch\nn\modules\module.py", line 1501, in _call_impl File "demucs\hdemucs.py", line 145, in forward File "torch\nn\modules\module.py", line 1501, in _call_impl File "demucs\demucs.py", line 165, in forward File "torch\nn\modules\module.py", line 1501, in _call_impl File "torch\nn\modules\container.py", line 217, in forward File "torch\nn\modules\module.py", line 1501, in _call_impl File "torch\nn\modules\normalization.py", line 273, in forward File "torch\nn\functional.py", line 2530, in group_norm "

Error Time Stamp [2026-09-07 12:58:17]

Full Application Settings:

vr_model: Choose Model aggression_setting: 5 window_size: 512 mdx_segment_size: Default batch_size: Default crop_size: 256 is_tta: False is_output_image: False is_post_process: False is_high_end_process: False post_process_threshold: 0.2 vr_voc_inst_secondary_model: No Model Selected vr_other_secondary_model: No Model Selected vr_bass_secondary_model: No Model Selected vr_drums_secondary_model: No Model Selected vr_is_secondary_model_activate: False vr_voc_inst_secondary_model_scale: 0.9 vr_other_secondary_model_scale: 0.7 vr_bass_secondary_model_scale: 0.5 vr_drums_secondary_model_scale: 0.5 demucs_model: v4 | htdemucs segment: Default overlap: 0.75 overlap_mdx: 0.75 overlap_mdx23: 2 shifts: 2 chunks_demucs: Auto margin_demucs: 44100 is_chunk_demucs: False is_chunk_mdxnet: False is_primary_stem_only_Demucs: True is_secondary_stem_only_Demucs: False is_split_mode: True is_demucs_combine_stems: True is_mdx23_combine_stems: True demucs_voc_inst_secondary_model: No Model Selected demucs_other_secondary_model: No Model Selected demucs_bass_secondary_model: No Model Selected demucs_drums_secondary_model: No Model Selected demucs_is_secondary_model_activate: False demucs_voc_inst_secondary_model_scale: 0.9 demucs_other_secondary_model_scale: 0.7 demucs_bass_secondary_model_scale: 0.5 demucs_drums_secondary_model_scale: 0.5 demucs_pre_proc_model: No Model Selected is_demucs_pre_proc_model_activate: False is_demucs_pre_proc_model_inst_mix: False mdx_net_model: Choose Model chunks: Auto margin: 44100 compensate: Auto denoise_option: None is_match_frequency_pitch: True phase_option: Automatic phase_shifts: None is_save_align: False is_match_silence: True is_spec_match: False is_mdx_c_seg_def: True is_use_torch_inference_mode: False is_invert_spec: False is_deverb_vocals: False deverb_vocal_opt: Main Vocals Only voc_split_save_opt: Lead Only is_mixer_mode: False mdx_batch_size: Default mdx_voc_inst_secondary_model: No Model Selected mdx_other_secondary_model: No Model Selected mdx_bass_secondary_model: No Model Selected mdx_drums_secondary_model: No Model Selected mdx_is_secondary_model_activate: False mdx_voc_inst_secondary_model_scale: 0.9 mdx_other_secondary_model_scale: 0.7 mdx_bass_secondary_model_scale: 0.5 mdx_drums_secondary_model_scale: 0.5 is_save_all_outputs_ensemble: True is_append_ensemble_name: False chosen_audio_tool: Manual Ensemble choose_algorithm: Min Spec time_stretch_rate: 2.0 pitch_rate: 2.0 is_time_correction: True is_gpu_conversion: True is_primary_stem_only: False is_secondary_stem_only: False is_testing_audio: False is_auto_update_model_params: True is_add_model_name: False is_accept_any_input: False is_save_to_input_path: False apollo_overlap: 2 apollo_chunk_size: 5 apollo_model: Choose Model is_task_complete: False is_normalization: False is_use_directml: True is_wav_ensemble: False is_create_model_folder: False mp3_bit_set: 320k semitone_shift: 2 save_format: WAV wav_type_set: PCM_24 device_set: AMD Radeon R7 Graphics:0 help_hints_var: True set_vocal_splitter: No Model Selected is_set_vocal_splitter: False is_save_inst_set_vocal_splitter: False model_sample_mode: True model_sample_mode_duration: 30 demucs_stems: Vocals mdx_stems: All Stems Patch Version: ### UVR_Patch_1_15_25_22_30_BETA`