"Steve has the most unbelievable range for a man that I've ever heard"

This quote by Eydie Gorme is referring to the singing range of Steve, who is likely a singer. Eydie Gorme is revealing her affection for Steve's singing variety, which she believes is the best she has actually ever heard. She is likely describing the variety of notes that Steve can sing, from the greatest to the most affordable. She is likewise likely describing the quality of his voice, which she thinks transcends to any other male vocalist she has actually heard. This quote is a testament to Steve's skill and ability as a singer, and it is clear that Eydie Gorme is impressed by his singing variety. It is likely that Steve has a vast array of vocal designs and methods, which enables him to sing a range of songs and categories. His variety is likely what sets him apart from other male vocalists, and it is what has earned him the affection of Eydie Gorme.