Research & Exploration: Sibelius Academy Harp Notation Manual
As I've continued to seek out the perfect sounds for the concerto, I accidentally discovered a harp resource that was, until this moment, unknown to me (1): The Sibelius Academy Harp Notation Manual.
While I can't overstate the importance and value of actually working with a harpist when writing for harp (2), this website might be the single greatest online resource I have come across - both for its quality and for its nearly-comprehensive coverage of technique.
Another site well worth a visit is Composing for Harp. I have to be honest and say I don't' like it quite as much as the Sibelius Academy website (I just find the Academy website easier to search/navigate), but a diversity of approach and opinion is always a good thing.
Happy exploring!
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1. This was quite surprising considering the amount of research I put in while writing my solo harp piece Within!
2. Pro tip: If you don't know a harpist, consider sending a snippet to Olivia Jageurs at 15 Second Harp.