KnowraSam WarnerLinked fromLinked fromThe 3 pages that link to Sam Warner, each with the reason it gives.All 3Related 3Warner Bros.Related: His advocacy for synchronized sound drove the studio’s defining early gamble.Al JolsonRelated: Warner Bros.’ sound-film ambitions brought Jolson to the screen in The Jazz Singer.Jack L. WarnerRelated: His advocacy for sound helped set the direction of the studio Jack later led.