zplane deCoda Flash Sale (Exclusive) $29

[cclarry]

https://www.pluginboutique.com/product/3-Studio-Tools/93-Music-Theory-Tools/6057-deCoda

[Grem]

This is a good plugin to learn songs with. Certainly worth the sale price

[ALC]

If you have deCoda LE (I got mine free with IK hardware) and are patient, you can get the upgrade when it goes on sale.  I upgraded in December for under $21.