From: Steinar H. Gunderson <sgunderson@bigfoot.com>
Date: Mon, 9 Nov 2015 22:00:42 +0000 (+0100)
Subject: Tweak the limiter by ear; increase the headroom so it does not trigger as often ... 
X-Git-Tag: 1.0.0~138
X-Git-Url: https://git.sesse.net/?a=commitdiff_plain;h=3b77fb6a74f7a58033168202a772f3630fb9a30f;p=nageru

Tweak the limiter by ear; increase the headroom so it does not trigger as often (we still have 10 dB to go on), and also increase the release time which makes it a lot less ugly. Tested on both music and conference audio.
---

diff --git a/mixer.cpp b/mixer.cpp
index 861ea94..8ccd7fa 100644
--- a/mixer.cpp
+++ b/mixer.cpp
@@ -585,7 +585,7 @@ void Mixer::process_audio_one_frame()
 		float threshold = pow(10.0f, limiter_threshold_dbfs / 20.0f);
 		float ratio = 30.0f;
 		float attack_time = 0.0f;  // Instant.
-		float release_time = 0.005f;
+		float release_time = 0.020f;
 		float makeup_gain = 1.0f;  // 0 dB.
 		limiter.process(samples_out.data(), samples_out.size() / 2, threshold, ratio, attack_time, release_time, makeup_gain);
 //		limiter_att = limiter.get_attenuation();
diff --git a/mixer.h b/mixer.h
index 64a74e2..252f961 100644
--- a/mixer.h
+++ b/mixer.h
@@ -257,7 +257,7 @@ private:
 	static constexpr float ref_level_dbfs = -14.0f;
 
 	StereoCompressor limiter;
-	std::atomic<float> limiter_threshold_dbfs{ref_level_dbfs + 0.0f};   // 0 dB.
+	std::atomic<float> limiter_threshold_dbfs{ref_level_dbfs + 4.0f};   // 4 dB.
 	std::atomic<bool> limiter_enabled{true};
 	StereoCompressor compressor;
 	std::atomic<float> compressor_threshold_dbfs{ref_level_dbfs - 12.0f};  // -12 dB.