Emulate the "line style" spectrum analyzer from Winamp 2

Submitted ⁨⁨1⁩ ⁨day⁩ ago⁩ by ⁨p1mrx@sh.itjust.works⁩ to ⁨retrocomputing@lemmy.sdf.org⁩

https://github.com/karlstav/cava/pull/614