multiple reel/tape structure

[pamelajean]

for each tape/reel part let's list the full id + reel/tape extent as the source identifier ie

csfpal_000021_t01_prsv

(followed by)
csfpal_000021_t01_a_prsv.wav

csfpal_000021_t01_b_prsv.wav

rather than:

csfpal_000021_prsv

and ie

csfpal_000021_t01_access

(followed by)
csfpal_000021_t01_a_access.mp3

csfpal_000021_t01_b_access.mp3)

[pamelajean]

still an issue...