Is it possible to modify an instrument's waveform to sound like another?

1. What device produces sound to different waveforms?
2. What causes different timbres?
3. What makes the timbre of one instrument better than another?

What device produces sound to different waveforms?

Loudspeakers are audio sound transducers that are classed as “sound actuators” and are the exact opposite of microphones. Their job is to convert complex electrical analogue signals into sound waves being as close to the original input signal as possible.

What causes different timbres?

Timbre is caused by the fact that each note from a musical instrument is a complex wave containing more than one frequency. For instruments that produce notes with a clear and specific pitch, the frequencies involved are part of a harmonic series.

What makes the timbre of one instrument better than another?

The primary contributers to the quality or timbre of the sound of a musical instrument are harmonic content, attack and decay, and vibrato. For sustained tones, the most important of these is the harmonic content, the number and relative intensity of the upper harmonics present in the sound.