The Secular Cantata BWV 30a "Angenehmes Wiederau, freue dich in deinen Auen!" (Charming Wiederau, take pleasure in your meadows!) was composed by J.S. Bach in Leipzig for acquisition of a manor and state at Wiederau by Johann Christian von Heinnicke, a protégé of Count Brühl in 1737. The cantata is scored for soprano, alto, tenor & bass soloists; 4-part Chorus; and orchestra of 3 trumpets, timpani, 2 transverse flutes, 2 oboes, oboe d'amore, 2 violins, viola, organ & continuo.
The Sacred Cantata BWV 30 "Freue dich, erlöste Schar" (Rejoice, redeemed host) was composed by J.S. Bach in Leipzig for the Feast of Nativity of St John the Baptist of 1738 (or one of the following years). This two-part cantata is scored for soprano, alto, tenor & bass soloists; 4-part Chorus; and orchestra 2 transverse flutes, 2 oboes, oboe d'amore, 2 violins, viola, organ & continuo. Most of BWV 30's musical material is borrowed from BWV 30a. However, several recordings "borrow" also the instrumentation of BWV 30 from BWV 30a.
The discography pages of both cantatas on the BCW have been revised and updated. See:
Cantata BWV 30 -Complete Recordings (19): http://www.bach-cantatas.com/BWV30.htm
Cantata BWV 30 - Recordings of Individual Movements (23): http://www.bach-cantatas.com/BWV30-2.htm
Cantata BWV 30a - Complete Recordings (4): http://www.bach-cantatas.com/BWV30a.htm
Cantata BWV 30a - Recordings of Individual Movements (3): http://www.bach-cantatas.com/BWV30a-2.htm
The revised discographies includes many listening/watching options as part of the recording details. When you click a link to video/audio, a new window will open above the discography page and the video/audio will start to play.
I also put at the BCW Home Page: http://www.bach-cantatas.com/
2 audios & 2 videos of the cantatas. A short description below the audio/video image is linked to the full details at the discography pages.
I believe these are the most comprehensive discographies of both cantatas. If you are aware of a recording of BWV 30 and/or BWV 30a missing from these pages, or want to correct/add details of a recording already presented on the BCW, please do not hesitate to inform me.
You can also read on the BCW the recent discussion of these cantatas in the BCML (4th round): http://www.bach-cantatas.com/BWV30-D5.htm