diff --git a/test/fuzzers/BUILD.gn b/test/fuzzers/BUILD.gn
index fc43ada06f..660230e7cb 100644
--- a/test/fuzzers/BUILD.gn
+++ b/test/fuzzers/BUILD.gn
@@ -449,6 +449,7 @@ webrtc_fuzzer_test("audio_processing_fuzzer") {
     "../../modules/audio_processing/aec3",
     "../../rtc_base:rtc_base_approved",
   ]
+  seed_corpus = "corpora/audio_processing-corpus"
 }
 
 webrtc_fuzzer_test("comfort_noise_decoder_fuzzer") {
diff --git a/test/fuzzers/audio_processing_configs_fuzzer.cc b/test/fuzzers/audio_processing_configs_fuzzer.cc
index a977ff9215..5f61e00499 100644
--- a/test/fuzzers/audio_processing_configs_fuzzer.cc
+++ b/test/fuzzers/audio_processing_configs_fuzzer.cc
@@ -27,7 +27,6 @@ std::unique_ptr<AudioProcessing> CreateApm(test::FuzzDataHelper* fuzz_data) {
   bool da = fuzz_data->ReadOrDefaultValue(true);
   bool ie = fuzz_data->ReadOrDefaultValue(true);
   bool red = fuzz_data->ReadOrDefaultValue(true);
-  bool lc = fuzz_data->ReadOrDefaultValue(true);
   bool hpf = fuzz_data->ReadOrDefaultValue(true);
   bool aec3 = fuzz_data->ReadOrDefaultValue(true);
 
@@ -40,6 +39,18 @@ std::unique_ptr<AudioProcessing> CreateApm(test::FuzzDataHelper* fuzz_data) {
   bool use_agc_limiter = fuzz_data->ReadOrDefaultValue(true);
   bool use_agc2_limiter = fuzz_data->ReadOrDefaultValue(true);
 
+  // Read an int8 value, but don't let it be too large or small.
+  const float gain_controller2_gain_db =
+      rtc::SafeClamp<int>(fuzz_data->ReadOrDefaultValue<int8_t>(0), -50, 50);
+
+  // Ignore a few bytes. Bytes from this segment will be used for
+  // future config flag changes. We assume 40 bytes is enough for
+  // configuring the APM.
+  constexpr size_t kSizeOfConfigSegment = 40;
+  RTC_DCHECK(kSizeOfConfigSegment >= fuzz_data->BytesRead());
+  static_cast<void>(
+      fuzz_data->ReadByteArray(kSizeOfConfigSegment - fuzz_data->BytesRead()));
+
   // Filter out incompatible settings that lead to CHECK failures.
   if (use_aecm && use_aec) {
     return nullptr;
@@ -71,14 +82,10 @@ std::unique_ptr<AudioProcessing> CreateApm(test::FuzzDataHelper* fuzz_data) {
 
   webrtc::AudioProcessing::Config apm_config;
   apm_config.residual_echo_detector.enabled = red;
-  apm_config.level_controller.enabled = lc;
   apm_config.high_pass_filter.enabled = hpf;
   apm_config.gain_controller2.enabled = use_agc2_limiter;
 
-  // Read an int8 value, but don't let it be too large or small.
-  const float gain_db =
-      rtc::SafeClamp<int>(fuzz_data->ReadOrDefaultValue<int8_t>(0), -50, 50);
-  apm_config.gain_controller2.fixed_gain_db = gain_db;
+  apm_config.gain_controller2.fixed_gain_db = gain_controller2_gain_db;
 
   apm->ApplyConfig(apm_config);
 
diff --git a/test/fuzzers/audio_processing_fuzzer_helper.cc b/test/fuzzers/audio_processing_fuzzer_helper.cc
index 30a66ed848..bdf5f105e7 100644
--- a/test/fuzzers/audio_processing_fuzzer_helper.cc
+++ b/test/fuzzers/audio_processing_fuzzer_helper.cc
@@ -50,7 +50,7 @@ void GenerateFixedFrame(test::FuzzDataHelper* fuzz_data,
   RTC_DCHECK_LE(samples_per_input_channel * num_channels,
                 AudioFrame::kMaxDataSizeSamples);
   for (size_t i = 0; i < samples_per_input_channel * num_channels; ++i) {
-    fixed_frame->mutable_data()[i] = fuzz_data->ReadOrDefaultValue(0);
+    fixed_frame->mutable_data()[i] = fuzz_data->ReadOrDefaultValue<int16_t>(0);
   }
 }
 }  // namespace
@@ -81,7 +81,7 @@ void FuzzAudioProcessing(test::FuzzDataHelper* fuzz_data,
         static_cast<size_t>(fuzz_data->SelectOneOf(rate_kinds));
 
     const bool num_channels = fuzz_data->ReadOrDefaultValue(true) ? 2 : 1;
-    const uint8_t stream_delay = fuzz_data->ReadOrDefaultValue(0);
+    const uint8_t stream_delay = fuzz_data->ReadOrDefaultValue<uint8_t>(0);
 
     // API call needed for AEC-2 and AEC-m to run.
     apm->set_stream_delay_ms(stream_delay);
diff --git a/test/fuzzers/corpora/audio_processing-corpus/audio-processing-0 b/test/fuzzers/corpora/audio_processing-corpus/audio-processing-0
new file mode 100644
index 0000000000..bc8471e92b
Binary files /dev/null and b/test/fuzzers/corpora/audio_processing-corpus/audio-processing-0 differ
diff --git a/test/fuzzers/corpora/audio_processing-corpus/audio-processing-1 b/test/fuzzers/corpora/audio_processing-corpus/audio-processing-1
new file mode 100644
index 0000000000..3fe154394a
Binary files /dev/null and b/test/fuzzers/corpora/audio_processing-corpus/audio-processing-1 differ
diff --git a/test/fuzzers/corpora/audio_processing-corpus/audio-processing-2 b/test/fuzzers/corpora/audio_processing-corpus/audio-processing-2
new file mode 100644
index 0000000000..cbd68b6fd5
Binary files /dev/null and b/test/fuzzers/corpora/audio_processing-corpus/audio-processing-2 differ
diff --git a/test/fuzzers/corpora/audio_processing-corpus/audio-processing-3 b/test/fuzzers/corpora/audio_processing-corpus/audio-processing-3
new file mode 100644
index 0000000000..50f85fbcae
Binary files /dev/null and b/test/fuzzers/corpora/audio_processing-corpus/audio-processing-3 differ
diff --git a/test/fuzzers/fuzz_data_helper.h b/test/fuzzers/fuzz_data_helper.h
index fb64bfe4ff..b5b916fecf 100644
--- a/test/fuzzers/fuzz_data_helper.h
+++ b/test/fuzzers/fuzz_data_helper.h
@@ -79,6 +79,8 @@ class FuzzDataHelper {
     return data_.subview(index_to_return, bytes);
   }
 
+  size_t BytesRead() const { return data_ix_; }
+
  private:
   rtc::ArrayView<const uint8_t> data_;
   size_t data_ix_ = 0;