Answer:
1.fortepiano (FP)
Sometimes a piece of music requires sudden changes in loudness, effectively resulting in accented notes. ... Classical composers also sometimes use the marking fp, which stands for fortepiano and means a forte accent immediately followed by piano.
2. Sforzando (sfz)
is an indication to make a strong, sudden accent on a note or chord. Sforzando literally means subito forzando (fz), which translates to “suddenly with force.
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