I feel quite comfortable doing piano improvisations, but I am very limited when talking about the organ improvisations.
Specifically, talking about the left hand, on the piano I can do the specific movements on the chord notes (e.g. for C major, I'd do C - G – E, C — G — D etc), but I don't know how to do that on the organ, since that won't sound very good on the organ. Would 8s/16s arpeggios be a solution for the organ?
Are there any specific techniques to use my piano improvisation experience for organ?
I saw some nice tutorials recommending, in case of chorals, playing the solo with the right hand on a manual, and making a counter melody with the left hand on another manual, and adding the bass. I am not an expert in building counter melodies, but while I can build them, I find it difficult to play the soprano with the counter melody in the same time. Could it be that my left hand is not trained yet to play melodies? I find it difficult to play solo with the left hand anyways.