SCNet Masked XL IHF Weights

New version of SCNet (scnet_masked) with mask - allows to reduce noise. There are weights for large XL IHF version trained on MUSDB18.

MUSDB18 Test Metrics:

Num overlap: 4
Instr drums sdr: 11.6207 (Std: 3.3777)
Instr drums bleedless: 26.9811 (Std: 9.6603)
Instr drums fullness: 20.2270 (Std: 8.8575)
Instr drums l1_freq: 43.1023 (Std: 11.7691)
Instr bass sdr: 8.9183 (Std: 4.8270)
Instr bass bleedless: 27.1082 (Std: 17.1666)
Instr bass fullness: 16.3376 (Std: 10.3509)
Instr bass l1_freq: 58.6868 (Std: 15.5151)
Instr other sdr: 7.7079 (Std: 3.0485)
Instr other bleedless: 24.1793 (Std: 9.8236)
Instr other fullness: 20.2322 (Std: 6.8875)
Instr other l1_freq: 38.1973 (Std: 12.5904)
Instr vocals sdr: 11.0675 (Std: 3.7956)
Instr vocals bleedless: 26.4048 (Std: 11.8723)
Instr vocals fullness: 20.4435 (Std: 7.2946)
Instr vocals l1_freq: 50.6262 (Std: 11.3240)
Metric avg sdr        : 9.8286
Metric avg bleedless  : 26.1683
Metric avg fullness   : 19.3101
Metric avg l1_freq    : 47.6531

Multisong dataset Metrics:

Num overlap: 4
Instr drums sdr: 11.3847 (Std: 5.0454)
Instr drums bleedless: 23.6516 (Std: 8.3218)
Instr drums fullness: 15.8085 (Std: 5.4690)
Instr drums l1_freq: 36.6667 (Std: 12.2488)
Instr bass sdr: 11.5754 (Std: 4.9476)
Instr bass bleedless: 23.8556 (Std: 15.0766)
Instr bass fullness: 21.7412 (Std: 14.2511)
Instr bass l1_freq: 52.6289 (Std: 16.7418)
Instr other sdr: 6.3082 (Std: 3.4198)
Instr other bleedless: 18.6385 (Std: 7.7289)
Instr other fullness: 16.5832 (Std: 4.5989)
Instr other l1_freq: 32.4004 (Std: 10.3759)
Instr vocals sdr: 9.4303 (Std: 3.2363)
Instr vocals bleedless: 24.0554 (Std: 7.9791)
Instr vocals fullness: 16.1403 (Std: 4.4971)
Instr vocals l1_freq: 34.2907 (Std: 10.5988)
Metric avg sdr        : 9.6747
Metric avg bleedless  : 22.5503
Metric avg fullness   : 17.5683
Metric avg l1_freq    : 38.9967