Ok,
I think I found the issue here.
Reaper doesnt respond to multiple Bands as such allocated by number. Instead, it wants a separate LoPass, HiPass, LoShelf, HiShelf, Band and Notch. When you set up the ReaperOSC File like this it works well:
FX_EQ_BYPASS b/mixer/bypass/x
FX_EQ_OPEN_UI b/mixer/eqgui/x
FX_EQ_MASTER_GAIN n/mixer/eqmast/x s/mixer/eqmaval/content
FX_EQ_WETDRY n/mixer/eqwet/x s/mixer/eqwetval/content
FX_EQ_HIPASS_FREQ n/mixer/bands/fhighpass/x n/mixer/bands/hpft/content
FX_EQ_HIPASS_Q n/mixer/bands/qhighpass/x n/mixer/bands/hpqt/content
FX_EQ_LOSHELF_FREQ n/mixer/bands/floshelf/x
FX_EQ_LOSHELF_GAIN n/mixer/bands/gloshelf/x
FX_EQ_LOSHELF_Q n/mixer/bands/qloshelf/x
FX_EQ_BAND_FREQ n/mixer/bands/fband/x
FX_EQ_BAND_GAIN n/mixer/bands/gband/x
FX_EQ_BAND_Q n/mixer/bands/qband/x
FX_EQ_NOTCH_FREQ n/mixer/bands/fnotch/x
FX_EQ_NOTCH_GAIN n/mixer/bands/gnotch/x
FX_EQ_NOTCH_Q n/mixer/bands/qnotch/x
FX_EQ_HISHELF_FREQ n/mixer/bands/fhishelf/x
FX_EQ_HISHELF_GAIN n/mixer/bands/ghishelf/x
FX_EQ_HISHELF_Q n/mixer/bands/qhishelf/x
FX_EQ_LOPASS_FREQ n/mixer/bands/flowpass/x
FX_EQ_LOPASS_Q n/mixer/bands/qlowpass/x
So it requires an extra ball in Lemur and them all to be labelled as above for it to work.
I can attach my template if you want, but I'm sure you get the idea and the edited version would be better coming from you.
