Wavetable synthesis Wavetable synthesis is a sound synthesis technique that employs arbitrary periodic waveforms in the production of musical tones or notes. The technique was developed by Wolfgang Palm of PPG in the late 1970s and published in 1979, and has since been used as the primary synthesis method in synthesizers built by PPG and Waldorf Music and as an auxiliary synthesis method by Sequential Circuits, Ensoniq, Korg, Access and Dave Smith Instruments among others. It was also independently developed by Michael Mcnabb in a similar time frame, and used in his classic work, Dreamsong (1977)  and documented in "The Making of Dreamsong," published in Computer Music Journal Volume 5, Number 4.
Phoneme A phoneme is a basic unit of a language's phonology, which is combined with other phonemes to form meaningful units such as words or morphemes. The phoneme can be described as "The smallest contrastive linguistic unit which may bring about a change of meaning". In this way the difference in meaning between the English words kill and kiss is a result of the exchange of the phoneme /l/ for the phoneme /s/. Two words that differ in meaning through a contrast of a single phoneme form a minimal pair. Notation
Diphthong A diphthong (/ˈdɪfθɒŋ/ or /ˈdɪpθɒŋ/; Greek: δίφθογγος, diphthongos, literally "two sounds" or "two tones"), also known as a gliding vowel, refers to two adjacent vowel sounds occurring within the same syllable. Technically, a diphthong is a vowel with two different targets: that is, the tongue (and/or other parts of the speech apparatus) moves during the pronunciation of the vowel. For most dialects of English, the phrase "no highway cowboys" contains five distinct diphthongs.
Speech synthesis Stephen Hawking is one of the most famous people using speech synthesis to communicate Speech synthesis is the artificial production of human speech. A computer system used for this purpose is called a speech synthesizer, and can be implemented in software or hardware products. A text-to-speech (TTS) system converts normal language text into speech; other systems render symbolic linguistic representations like phonetic transcriptions into speech.
Diagram of basic procedure to determine whether two sounds are allophones History of concept The term "allophone" was coined by Benjamin Lee Whorf in the 1940s. Allophone