diff --git a/dsp/spectral.cpp b/dsp/spectral.cpp
index 2485b60..85fa987 100644
--- a/dsp/spectral.cpp
+++ b/dsp/spectral.cpp
@@ -3,9 +3,9 @@
 #include <cstring>
 #include <vector>
 
-SpectralProcessor::SpectralProcessor(size_t nfft, size_t hop)
+SpectralProcessor::SpectralProcessor(size_t nfft, size_t hop, float sample_rate)
     : nfft_(nfft), hop_(hop), frame_count_(0), output_pos_(0),
-      detector_(nfft, 44100.0f) {
+      detector_(nfft, sample_rate) {
     window_ = new double[nfft_];
     computeWindow();
     fft::init_plan(&plan_, static_cast<uint32_t>(std::log2(nfft_)));
diff --git a/dsp/spectral.hpp b/dsp/spectral.hpp
index 5327fc8..49ce0a5 100644
--- a/dsp/spectral.hpp
+++ b/dsp/spectral.hpp
@@ -11,7 +11,8 @@ constexpr size_t DEFAULT_HOP = 512;
 
 class SpectralProcessor {
 public:
-    SpectralProcessor(size_t nfft = DEFAULT_NFFT, size_t hop = DEFAULT_HOP);
+    SpectralProcessor(size_t nfft = DEFAULT_NFFT, size_t hop = DEFAULT_HOP,
+                      float sample_rate = 44100.0f);
     ~SpectralProcessor();
 
     void setDetectorParams(const std::vector<DetectorBand>& bands);