Prior to the early few centuries of the first millennia, planetary measurement was always referenced to the fixed stars (sidereal) as was the astrology of the ancients (Babylonia, etc). Astronomy and astrology were always one and the same until the Greco-Roman church-state astronomers began to record planetary ephemerides referenced to the moving vernal point rather than to the fixed stars, but ignoring that the vernal point moved with precession, and while maintaining that all other heavenly bodies rotated around the Earth—a statement certainly affirming true egoic consciousness. (This was due in particular to Claudius Ptolemaeus (c. 90 - c. 168 CE) who was employed by the Greco-Roman controlling faction. Ptolemaeus was a mathematician, not a true astronomer. Some assert he never even looked into the heavens as an astronomer would look (Allen).) To say anything other than Earth was the center was heresy, so only those willing to sell out to the manipulative ploys of the church-state, and perpetuate the asserted geocentric dogma of western Christendom, stayed on the pay-role and kept their heads (actually, heretics were burned at the stake!). Here was planted the bastardization of true soul level astronomical astrology, and here began the Hellenistic, Ptolemaic, tropical astrology during an age of suppression, and which is still in vogue today. This is not to say either way that Ptolemy was ill-intended or was deliberately trying to mislead—a topic of controversy amongst historians. However, it was merely the nature of the times and the natural course of evolution, a time of trying to re-emerge from the lost wisdom of the ancients amalgamated with manipulative powers attempting to control empires, land and people. People from the future may say the same for us now.
Civil Twilight is defined as the sun being 6 deg below the horizon, Nautical Twilight as 12 deg . Therefore, the duration of the twilight depends on how long the sun needs to cross these 12 deg , and this (mainly) depends from the angle the sun circle is tilted towards the planet's "disc". This angle is steep (orthogonal to the planet's disc) at the equator. The further away from the equator the observer is, the flatter the angle becomes, and there are Northern regions in which not the whole twilight cycle is completed. This is the case for all latitudes North of 90 deg -Axis-12 deg = deg .
The Adaptive Limiter is a professional look-ahead brickwall peak limiter that is designed for both mixing and mastering now available in the Engineering Suite. It feature Inter Sample Peak (ISP) detection, 4 different limiting “Character” types, LUFS Loudness & K-Metering, as well MP3 codec preview, and real-time dithering. These different limiting types allow the engineer to have control over how transparent or aggressive the limiter behaves so it can be catered for different material making it a great track limiter and a perfect mastering limiter.