Could an engineer reverse engineer the EPROM on the Roland Juno synthesizers and add an option for the enhanced equal temperament that has the octaves correct in pitch rather that frequency.
Pitch and frequency are related but they are not the same.
Frequency in Hz is the objective quantity.
Pitch in Mels in the subjective quantity (what our brain feels).
For example 500Hz to 2000Hz is a bad sounding double octave to our brain. The correct depends also on intensity but could be for example 2025Hz. It is very easy to demonstrate for yourself with any online signal generator.
The Juno series use a master high oscillator and then divisions to get an equal temperament with x2 octaves.
Could somebody change the numbers that divide so that an equal temperament still results but with any octaves correct to out brain. The effect is increasingly important to the extremes of the spectrum, low bass and high treble.
The Pleiades temperament is such an attempt, is open source and the deviation in cents from equal temperament can be found on the euroelectron blog with title upgrade Pleiades tuning for the Korg Triton.
It also exists for the DX7ii.
It is not that the Pleiades tuning is stretched. It is that the ordinary equal temperament is shrinked to our brain perception.
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