diff --git a/audio/algo/drain/Equalizer.cpp b/audio/algo/drain/Equalizer.cpp
index 7bff95d..d4a8524 100644
--- a/audio/algo/drain/Equalizer.cpp
+++ b/audio/algo/drain/Equalizer.cpp
@@ -36,6 +36,10 @@ namespace audio {
 						
 					}
 				public:
+					/**
+					 * @brief Reset all history of the Algo.
+					 */
+					virtual void reset() = 0;
 					/**
 					 * @brief Initialize the Algorithm
 					 * @param[in] _sampleRate Sample rate of the stream.
@@ -87,6 +91,13 @@ namespace audio {
 					 */
 					virtual ~EqualizerPrivateType() {
 						
+					}
+					virtual void reset() {
+						for (size_t jjj=0; jjj<m_biquads.size(); ++jjj) {
+							for (size_t iii=0; iii<m_biquads[jjj].size(); ++iii) {
+								m_biquads[jjj][iii].reset();
+							}
+						}
 					}
 					virtual void init(float _sampleRate=48000, int8_t _nbChannel=2) {
 						audio::algo::drain::EqualizerPrivate::init(_sampleRate, _nbChannel);
@@ -274,6 +285,13 @@ void audio::algo::drain::Equalizer::init(float _sampleRate, int8_t _nbChannel, e
 			break;
 	}
 }
+void audio::algo::drain::Equalizer::reset() {
+	if (m_private == nullptr) {
+		AA_DRAIN_ERROR("Equalizer does not init ...");
+		return;
+	}
+	m_private->reset();
+}
 
 std::vector<enum audio::format> audio::algo::drain::Equalizer::getSupportedFormat() {
 	std::vector<enum audio::format> out = audio::algo::drain::Equalizer::getNativeSupportedFormat();
diff --git a/audio/algo/drain/Equalizer.h b/audio/algo/drain/Equalizer.h
index c652294..8820a94 100644
--- a/audio/algo/drain/Equalizer.h
+++ b/audio/algo/drain/Equalizer.h
@@ -28,6 +28,10 @@ namespace audio {
 					 */
 					virtual ~Equalizer();
 				public:
+					/**
+					 * @brief Reset all history of the Algo.
+					 */
+					void reset();
 					/**
 					 * @brief Initialize the Algorithm
 					 * @param[in] _sampleRate Sample rate of the stream.