The
first 20-50 ms of a tone are most important for the psychology of the
ear. In this time it decides which kind of sound it is. The rest of
the tone is of less interest and in the most cases it is also relative
low dynamic.
The Semi-Loop Synthesis uses this fact and starts a tone with a short natural sample that is then extended by looping the last wave cycle until the end of the tone so that the sound stays constant for any time. This way you can produce a sustaining sound from a short wave fragment and prevent it from fading away like a “plob”. You can make a sustaining piano, guitar or steel drum.
You
can also modify the initial wave:
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Learning Synthesizer >