Reverted tests/scale_pcm.py

I am confused why this was necessary. What was the breaking thing here @norvell ?

I agree, these fixes look like simple formatting and cleanup. I debugged a little bit and I think the files were populated but nothing happened when line after that was run. Since the old version worked I just reverted and thought we could look at it later.

Hi @kiene,

I did some debugging and what broke the script was the removal of import pyivastest. I am still confused why this broke the script. There are several tools in that folder and I did not look into what is creating this difference. There is no error message when you remove this line, it just exits without any printout and without any scaling applied.

uff

It seems this line in def scale_file(file1, file2, factor=1.0) exits without the import above.

s1, fs = pyaudio3dtools.audiofile.readfile(file1)