Marty Grosz wrote the biography and notes on the music for this set. According to Marty, there are 34 existing recordings by Tesch. The set includes 40 recordings. The extra six are by Tesch sound-alikes. In the liners, Marty cites as sound-alikes Pee Wee Russell, Fud Livingston and Maurice Bercov. Do You/Gloriana are not included in the set, indicating that Tesch does not play in these recordings.
Apparently, there was a "Chicago Style" of clarinet playing. Among those associated with that style were Pee Wee Russell, Fud Livingston, Maurice Bercov, Wade Foster, Bud Jacobson and Jimmy Lord, and, of course, Frank Teschemacher. Probably others. The Chicago clarinetist who had his own style and was certainly not a Tesch "sound-alike" was the great Benny Goodman. What is interesting is that, in spite of their different styles, both Benny and Tesch were inspired/influenced by Bix.