use fixed fall-off time for k-meter
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@ -273,6 +273,11 @@ PeakMeter::meter ()
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const size_t limit = min (_peak_signal.size(), (size_t) current_meters.n_total ());
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const size_t n_midi = min (_peak_signal.size(), (size_t) current_meters.n_midi());
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/* 0.01f ^= 100 Hz update rate */
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const float midi_meter_falloff = Config->get_meter_falloff() * 0.01f;
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/* kmeters: 24dB / 2 sec */
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const float audio_meter_falloff = (_meter_type & (MeterK20 | MeterK14)) ? 0.12f : midi_meter_falloff;
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for (size_t n = 0; n < limit; ++n) {
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/* grab peak since last read */
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@ -283,11 +288,11 @@ PeakMeter::meter ()
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if (n < n_midi) {
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_max_peak_power[n] = -INFINITY; // std::max (new_peak, _max_peak_power[n]); // XXX
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_max_peak_signal[n] = 0;
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if (Config->get_meter_falloff() == 0.0f || new_peak > _visible_peak_power[n]) {
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if (midi_meter_falloff == 0.0f || new_peak > _visible_peak_power[n]) {
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;
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} else {
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/* empirical WRT to falloff times , 0.01f ^= 100 Hz update rate */
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new_peak = _visible_peak_power[n] - sqrt(_visible_peak_power[n] * Config->get_meter_falloff() * 0.01f * 0.0002f);
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/* empirical algorithm WRT to audio falloff times */
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new_peak = _visible_peak_power[n] - sqrt(_visible_peak_power[n] * midi_meter_falloff * 0.0002f);
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if (new_peak < (1.0 / 512.0)) new_peak = 0;
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}
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_visible_peak_power[n] = new_peak;
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@ -310,11 +315,11 @@ PeakMeter::meter ()
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_max_peak_power[n] = std::max (new_peak, _max_peak_power[n]);
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if (Config->get_meter_falloff() == 0.0f || new_peak > _visible_peak_power[n]) {
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if (audio_meter_falloff == 0.0f || new_peak > _visible_peak_power[n]) {
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_visible_peak_power[n] = new_peak;
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} else {
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// do falloff
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new_peak = _visible_peak_power[n] - (Config->get_meter_falloff() * 0.01f);
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new_peak = _visible_peak_power[n] - (audio_meter_falloff);
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_visible_peak_power[n] = std::max (new_peak, -INFINITY);
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}
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}
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