What does the PDF download contain?

The current PDF has 18 pages, including individual parts.

What parts are listed for I Know Why (4.Octet)?

The listed parts are Trumpet, Tenor Saxophone, Trombone, Baritone Saxophone, Guitar, Piano, Bass, Drums.

After purchase, the digital PDF is available through your JazzLib order and downloads.

A listening reference. The purchased item is the digital PDF, not an audio download.

Ensemble: Small Ensemble
Pages: 18
Instruments (8): Trumpet, Tenor Saxophone, Trombone, Baritone Saxophone, Guitar, Piano, Bass, Drums
Content: individual parts
Format: PDF Download (Instant)
Price: $12.99

What does the PDF download contain?: The current PDF has 18 pages, including individual parts.
What parts are listed for I Know Why (4.Octet)?: The listed parts are Trumpet, Tenor Saxophone, Trombone, Baritone Saxophone, Guitar, Piano, Bass, Drums.
How will I receive the arrangement?: After purchase, the digital PDF is available through your JazzLib order and downloads.