-- @/lua/common/filters.lua:91
function newFreqDetector()
local data = {
peak = 0, bottom = 0, prevPeak = 0, prevBottom = 0,
peakDt = 0, bottomDt = 0, prevPeakDt = 0, prevBottomDt = 0,
peakL = 0, bottomL = 0, period = 0, ampl = 0, state = 0, bias = 0
}
return setmetatable(data, freqDetector)
end