From 5d9bc2fdf3672aa67f3ffa879a3a7c49abafae76 Mon Sep 17 00:00:00 2001
From: oparviai <oparviai@f3a24b6a-cf45-0410-b55a-8c22e2698227>
Date: Sun, 8 Jan 2017 16:56:20 +0000
Subject: [PATCH] Adjusted algorithm parameters for reducing reverberation
 artifact at tempo slowdown

---
 README.html                     | 1 +
 source/SoundTouch/TDStretch.cpp | 6 +++---
 2 files changed, 4 insertions(+), 3 deletions(-)

diff --git a/README.html b/README.html
index 1230739..eac9ceb 100644
--- a/README.html
+++ b/README.html
@@ -574,6 +574,7 @@ this corresponds to lowering the pitch by -0.318 semitones:</p>
     <ul>
         <li>Added functions to get initial processing latency, duration ratio between the original input and processed output tracks, and clarified reporting of input/output batch sizes</li>
         <li>Fixed issue that added brief sequence of silence to beginning of output audio</li>
+        <li>Adjusted algorithm parameters to reduce reverberating effect at tempo slowdown</li>
         <li>Bugfix: Fixed a glitch that could cause negative array indexing in quick seek algorithm</li>
         <li>Bugfix: flush() didn't properly flush final samples from the pipeline on 2nd time in case that soundtouch object instance was recycled and used for processing a second audio stream.</li>
         <li>Bugfix: Pi value had incorrect 9th/10th decimals</li>
diff --git a/source/SoundTouch/TDStretch.cpp b/source/SoundTouch/TDStretch.cpp
index 3a4ccbb..f2c7297 100644
--- a/source/SoundTouch/TDStretch.cpp
+++ b/source/SoundTouch/TDStretch.cpp
@@ -524,13 +524,13 @@ void TDStretch::calcSeqParameters()
     #define AUTOSEQ_TEMPO_TOP   2.0     // auto setting top tempo range (+100%)
 
     // sequence-ms setting values at above low & top tempo
-    #define AUTOSEQ_AT_MIN      125.0
-    #define AUTOSEQ_AT_MAX      50.0
+    #define AUTOSEQ_AT_MIN      90.0
+    #define AUTOSEQ_AT_MAX      40.0
     #define AUTOSEQ_K           ((AUTOSEQ_AT_MAX - AUTOSEQ_AT_MIN) / (AUTOSEQ_TEMPO_TOP - AUTOSEQ_TEMPO_LOW))
     #define AUTOSEQ_C           (AUTOSEQ_AT_MIN - (AUTOSEQ_K) * (AUTOSEQ_TEMPO_LOW))
 
     // seek-window-ms setting values at above low & top tempoq
-    #define AUTOSEEK_AT_MIN     25.0
+    #define AUTOSEEK_AT_MIN     20.0
     #define AUTOSEEK_AT_MAX     15.0
     #define AUTOSEEK_K          ((AUTOSEEK_AT_MAX - AUTOSEEK_AT_MIN) / (AUTOSEQ_TEMPO_TOP - AUTOSEQ_TEMPO_LOW))
     #define AUTOSEEK_C          (AUTOSEEK_AT_MIN - (AUTOSEEK_K) * (AUTOSEQ_TEMPO_LOW))