Collection Descriptive Notes:
Exercises 1-16; Tests 1-6. The exercises consist entirely of the pronunciation of minimal pairs with a pause for repetition. A tone on the left channel marks one or the other of the tokens. (It appears that a man speaking American English joined the speakers in the studio and supervised them.)
Collection Technical Notes:
These masters were recorded in the studio of the Language Lab in June-July 1963; John E. Wahl and Donald H. Ledin, rec. engs. (The identity of the recording engineers is based on the handwriting on the back of the boxes.) Each tape was edited (by Wahl?, by Ledin?) to eliminate false starts, errors, etc.