Slower performance for Torchmetrics PESQ

[ashinkajay]

🐛 Bug

Multiprocessing capability is missing for Torchmetrics PESQ while the underlying library ludlows/python-pesq have that option.
As a result, the torchmetrics version of PESQ performs slower than ludlows/python-pesq.

To Reproduce

Run PESQ for a batch of 100 audios with a minimum duration of 10 seconds for each audio.

Code sample

Python notebook code attachment here: analysis.zip

Expected behavior

Both the Torchmetrics PESQ and ludlows/python-pesq should take almost the same time to compute the PESQ score.

Environment

• Python - 3.10.4 (installed using conda)

Below libraries installed using pip

• TorchMetrics - 0.9.3
• PyTorch - 1.12.1
• Torchaudio - 0.12.1
• OS: Ubuntu 20.04.4 LTS

Additional context

References
ludlows/python-pesq: https://github.com/ludlows/PESQ

[ashinkajay]

Need to add more details

[Borda]

duplicated with #1223