Words to Describe crooning

How crooning often is described ("________ crooning")

• cool
• fashioned
• gentle
• mournful
• dull
• much
• lazy
• deep
• sweet
• sentimental
• young
• less
• monotonous
• dismal
• mystic
• little
• faint
• quiet
• plaintive
• delectable
• low
• smooth
• wordless
• weird
• melodious
• curious
• drowsy
• romantic
• strange
• soft
• magnetic