soft singing

• hummingContinuous low-pitched sound
• lullabySoothing song for babies
• crooningSinging softly, sentimentally
• murmuringSpeaking softly, indistinctly
• whisperSpeech without full voice

gentle · melody · soothing · tender · hushed · breathy · cooing · serenade · hush · dulcet · mellow · cradle · bedside · intimate · velvet · lilting · drowsy · quiet

• crooningsmooth vocals, serenading, love song, torch song, ballad
• singingsoprano, lead vocals, vocalist, alto, backing vocals