I'm just wondering what the point is of synth instruments (manipulating waveforms) if I can just use samples for everything. For example, say I sample a single middle-c piano note. My understanding is that a DAW sampler can then change the pitches of this one sample so I could potentially get all the notes across the piano from just this one sample. Similarly I could use samples for all harmony, beats, and melodies across all instruments. So could my entire song be made of samples, why use synth instruments then?