^ tama. hahaha... parang it all boils down to learning the basics before actually sightreading. Pag hindi mo alam ang basics (note names on the staff, note duration, elements of music, scales and arpeggios, etc.), mahihirapan mag-sightread.
I learned how to sightread nang sapilitan. haha... sa SICCO. Grabe, bawat upo ko laging bago yung piece. Napipilitan ako mag-sightread at magpractice ng mga exercises at scale para makatugtog ako nang maayos every rehearsal. Minsan hindi pinapauwi ni sir yung pyesa, kaya ayun, todo practice ako sa exercises, mas nagiging madali ang sightreading.
Sabi rin ni JM, mas makakasightread din kung makakapag-arrange ka or notate a music on your own (sifra). Kasi in arranging or notating the music through listening, hahasa ang rhythmic notation and melodic notation. Mas makakapagsightread ka lalo na pag alam na alam mo ang rhythm.
Sabi rin ng isa kong teacher (haha, yes si Miss Pil ito), you should have an inner ear--a sense of rhythm deep inside without tapping your feet or nodding. It should be in your mind--yung pulse (regularity of beat). Tapos this also applies sa melody, by memory we should have a reference or at most know all the pitch of the notes (pwedeng absolute or movable). Absolute means yung C = do, D = re, etc..., yung movable Tonic (first note on every scale) = do. Let's say key of A major, sa movable A=do B=re C#=mi D=fa... etc. Kaya I'm teaching my students the music alphabet rather than the so-fa syllables. Pero I explain na so-fa syllables are good for singing while music alphabets are good for identification. (dahil kay ms. pil... haha) Dati kasi so-fa syllables ginagamit ko sa pag-identify (as taught by my first rudiments professor) Nung kay Ms. Pil na sa theory, ayun nabago. Pero I find Ms. Pil's idea a logical one, kaya ayun ginagamit ko. At hindi dahil na naging favorite ko sya at one point in my life. haha.. :))