Orchestration
String Bowing and Articulation: A Practical Arranger Guide
Legato, detache, spiccato, staccato, martelé: what each bowing sounds like, how to mark it, and writing playable string parts.
The archive
100 pieces on how music is built and how it is written down — with playable examples, tables you can check, and no filler.
♮ intro · ♯♯ intermediate · ♯♯♯♯ advanced — like key signatures, more marks means more to hold in mind
Orchestration
Legato, detache, spiccato, staccato, martelé: what each bowing sounds like, how to mark it, and writing playable string parts.

The ebook
The site's working library as a structured ebook: intervals, keys, harmony, counterpoint, rhythm, form, tuning, orchestration and the history behind them.
The Gumroad link opens the seller’s listing and checkout. Review the current total and purchase terms there; the free site does not require a purchase.