Divide tracks by chain

[then]

Hello. I need to create chain which:
1) increases track's tempo by 50%;
2) divides track into pieces (files) of 30 minutes and the residue (last file < 30 min);
3) converts these tracks into mp3.

Now I can perform steps 1 and 3 (one file by one track) with parameters of the chain:
01 | ChangeTempo | Percentage="50,000000000000"
02 | ExportMP3
03 | END

How to change the scheme (add parameters) for step 2 (divide track into 30 min. files)?

[then]

I mean Audacity -> File -> Apply / Edit Chain

[steve]

How to change the scheme (add parameters) for step 2 (divide track into 30 min. files)?

Sorry but the Chains feature is not yet sophisticated enough to do that. Two essential ingredients are missing:
1)Include features dependent on selecting regions
2) Export Multiple

I've added your "vote" for these features to be developed.
These are not easy features to add, so I doubt that they will be developed soon, but I have logged your interest on the Audacity "feature request" page of the wiki.
(http://wiki.audacityteam.org/wiki/Featu ... 29_feature)

I've also moved this topic to the "adding features" part of the forum.

[then]

Ok. Thank you very much for your answer.
P. s. I divided tracks by freeware mp3DirectCut (batch processing with pause detection).