From d014dc2d1447d08c0af322f9adb5e1b5450b8cac Mon Sep 17 00:00:00 2001
From: Ken Cooke <ken@highfidelity.io>
Date: Thu, 7 Feb 2019 15:35:20 -0800
Subject: [PATCH] Add audio meter ballistics for less display jitter (10ms
 attack, 300ms release)

---
 libraries/audio-client/src/AudioClient.cpp | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/libraries/audio-client/src/AudioClient.cpp b/libraries/audio-client/src/AudioClient.cpp
index 4489d19806..60a95ff58a 100644
--- a/libraries/audio-client/src/AudioClient.cpp
+++ b/libraries/audio-client/src/AudioClient.cpp
@@ -1222,7 +1222,11 @@ void AudioClient::handleMicAudioInput() {
 
         // detect loudness and clipping on the raw input
         bool isClipping = false;
-        _lastInputLoudness = computeLoudness(inputAudioSamples.get(), inputSamplesRequired, _inputFormat.channelCount(), isClipping);
+        float inputLoudness = computeLoudness(inputAudioSamples.get(), inputSamplesRequired, _inputFormat.channelCount(), isClipping);
+
+        float tc = (inputLoudness > _lastInputLoudness) ? 0.378f : 0.967f;  // 10ms attack, 300ms release @ 100Hz
+        inputLoudness += tc * (_lastInputLoudness - inputLoudness);
+        _lastInputLoudness = inputLoudness;
 
         if (isClipping) {
             _timeSinceLastClip = 0.0f;