How do I change the background color of "showwaves"?

[carman11]

How do I change the background color of "showwaves" please!

[carman11]

Not the color of the lines, but the color of the background

[rgm89git]

Still nothing. I also want to add background color to showwaves.

I tried using "maskedmerge" with "color", but it doesn't stop when the audio finished.

return "[aid1] asplit [ai][ao],color=c=0x1e1e2e:s=" .. w .. "x" .. h .. ":r=" .. fps .. ",format=gbrp[v0],[ai]showwaves=s=" .. w .. "x" .. h .. ":r=" .. fps .. ":mode=cline:scale=sqrt:draw=full:colors=0xcba6f7|0xf38ba8,split[v1][v1m]" .. ",[v1m]alphaextract[v1m]" .. ",[v0][v1][v1m]maskedmerge[vo]"