What do black nylon flatwound bass strings sound like?

How to make my new bass sound old and dull? The strings are new, and i want them to sound old asap for rec session : r/Bass

Magma BE400NB Black Nylon Tapewound Bass Strings, Light 50-105

RotoSound Electric Tru Bass Black Nylon Flatwound 6 String, .050 - .135, RS886LD RotoSound RS886LD RTS_RS886LD

Bass Strings 101

Gold Tone MicroBass Flatwound Strings

7710N BLACK Nylon Tape Wound Upright Bass Strings - Gollihur Music

Do they sound like roundwound strings? Ernie Ball Cobalt Flatwound

D'Addario Black Nylon Tapewound Bass String Set Long Scale

For the classic sound of the 60's. Original Hofner strings for Violin Bass and Club Bass, Flat-wound. They are short scale 40-55-75-100, and measure

Hofner H1133B Flatwound Bass Strings

Strings

Rotosound RS88S Tru Bass 88 Black Nylon Tapewound Bass Guitar Strings - .065-.115 Standard Short Scale 4-string

Flatwound vs. Roundwound on the Fender Jazz Bass

Freebird bass line (play some Skynyrd, man!)

Black flatwounds?