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Some quick questions that arrived today...
What is the definition of 'hi-fi'?
The original meaning of hi-fi is 'high fidelity', meaning faithfulness to the original sound source. Hi-fi originated in the 1950s when the idea of creating music or an original sound in the studio was unheard of. Hence recording engineers and hi-fi equipment manufacturers sought to capture and reproduce the sound of musicians as accurately as possible.
What passes for a 'hi-fi' system in electrical goods stores these days is a travesty of the original concept.
If only three of the pins in the 5-pin DIN of a MIDI cable are used, what exactly is the purpose of the other two?
The other two pins are not connected. The 5-pin DIN connector was going out of fashion for hi-fi when MIDI was introduced in the early 1980's but since it was still commonly available it made a good choice. Why the 180-degree 5-pin was chosen and not the 270-degree 5-pin or the 3-pin, we don't know. Does anyone have an answer, or a potentially plausible reason?
Given that MIDI transfers key press data, what happens in the case where the keyboard comes with an internal sound generator?
The data is transferred internally. In theory, it would not require MIDI to make the internal transfer so a faster method could be used. This would allow notes to be played simultaneously, where a chord played via MIDI sounds ever so slightly spread apart in time.
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