lines separating octaves width

[sugizo]

problems with lines separating octaves width
when changing the resolution
400 x 300

hd 1920 x 1080

4k 3840 x 2160

8k 7680 x 4320

suggestion
make dynamic or responsive lines separating octaves width
e.g.
synthviz/main.py

        # draw lines separating octaves
        if i % 12 == 0:
            im_lines[0:(key_start-1), (x0-2):(x0-1)] = [20, 20, 20]

im_lines[0:(key_start-1), (x0-2):(x0-1)]
should be

line_width = 9 # or whatever value from user entry (or you can hard code it, in scale of the picture width)
im_lines[0:(key_start - 1), (x0 - line_width):(x0 - 1) ]

best regards