13 December 2009
Here's a very narrow category: Performances by Bing Crosby and Johnny Mercer together, issued on MP3. (Bing singing Mercer songs is another, much larger category.)
1949-01-12 - With Johnny Mercer by Bing Crosby. From the Album The Bing Crosby Show Vol. 12
As MP3s go, this is a great deal. 29 minutes, and costs 89 cents. It's an episode of Philco Radio Time with Bing Crosby, Johnny Mercer, Peggy Lee, John Scott Trotter, Jud Conlin and Ken Carpenter. "Produced and transcribed in Hollywood."
Mister Meadowlark by Bing Crosby With Johnny Mercer. From the Album Bing Crosby & Company
Recorded 15 April 1940 with Victor Young and his Orchestra, in Los Angeles, for Decca. Written by Johnny Mercer and Walter Donaldson.
Small Fry by Bing Crosby, Johnny Mercer. From the Album Hoagy Carmichael. Stardust - 51 Original Mono Recordings 1924-1957
Recorded 1 July 1938 with Victor Young's Small Fryers, in Los Angeles, for Decca. Written by Hoagy Carmichael and Frank Loesser, from "Sing You Sinners".
Each page allows you to hear samples.