The tune has a first and second ending. The introduction repeats the first two measures of the first ending. Roughly, they are

First Ending

| Cmaj7 | Dm7 G7 | Cmaj7 | Dm7 G7 |Cmaj7 | Dm7 G7 | Cm7 | F7 | Abmaj7 B7 | Emaj7 G13 | Cmaj7 | Dm7 G7 |

Second ending

|Cmaj7 | Dm7 G7 | Cm7 | F7 | Abmaj7 B7 | Emaj7 G13 | Cmaj7 | Dm7 G7 | Cmaj7 | Dm7 G7 | Cmaj7 | Dm7 G7 | Cmaj7 | Bm7 E7 | Em7 A7 | Dm7 G7 ||

You know BIAB is going to have trouble with two critical measures, which have a "Giant Steps" feel: | Abmaj7 B7 | Emaj7 G13 |. Sure enough, things sound incoherent right at these measures. There are nice changes at the end of the second ending, but these are squandered by BIAB's general confusion and the effectiveness of these changes doesn't come through.

Conclusion: This is a solid progression and melody suitable for human players. BIAB has its limits and this demanding tune just exceeds them. Ooooh, would I like to have a crack at this one. How about it Guenter? - I got a real cool fretless; I can make that baby growl...

Aleck