diff --git a/src/ra/generator/GlideSweep.cpp b/src/ra/generator/GlideSweep.cpp
index fd08eef..e50ca58 100644
--- a/src/ra/generator/GlideSweep.cpp
+++ b/src/ra/generator/GlideSweep.cpp
@@ -25,8 +25,6 @@ namespace ra {
 //     - n2 is the ending sample index of the sweep.
 auto generate(GlideSweep const& spec) -> std::vector<float>
 {
-    using Seconds = std::chrono::duration<double>;
-
     auto scaleFrequency = [curve = spec.curve](auto f1, auto f2, auto t) {
         if (curve == GlideSweep::Curve::Logarithmic) {
             return std::pow(f1 * (f2 / f1), t);
@@ -37,10 +35,10 @@ auto generate(GlideSweep const& spec) -> std::vector<float>
     auto const fs         = spec.sampleRate;
     auto const f1         = spec.from.numerical_value_in(si::hertz);
     auto const f2         = spec.to.numerical_value_in(si::hertz);
-    auto const numSamples = static_cast<size_t>(std::chrono::duration_cast<Seconds>(spec.duration).count() * fs);
+    auto const numSamples = static_cast<size_t>((spec.duration * fs).numerical_value_in(one));
 
     auto buffer = std::vector<float>(numSamples, 0.0F);
-    auto osc    = SineOscillator<double>{fs};
+    auto osc    = SineOscillator<double>{fs.numerical_value_in(si::hertz)};
 
     for (auto i{0UL}; i < numSamples; ++i) {
         auto const t         = static_cast<double>(i) / static_cast<double>(numSamples - 1);
diff --git a/src/ra/generator/GlideSweep.hpp b/src/ra/generator/GlideSweep.hpp
index 92e1802..81d1c85 100644
--- a/src/ra/generator/GlideSweep.hpp
+++ b/src/ra/generator/GlideSweep.hpp
@@ -23,8 +23,8 @@ struct GlideSweep
     quantity<isq::frequency[si::hertz]> from{20.0 * si::hertz};
     quantity<isq::frequency[si::hertz]> to{20'000.0 * si::hertz};
     Curve curve{Curve::Linear};
-    std::chrono::milliseconds duration{1'000};
-    double sampleRate{44'100.0};
+    quantity<isq::duration[si::second]> duration{1.0 * si::second};
+    quantity<isq::frequency[si::hertz]> sampleRate{44'100.0 * si::hertz};
 };
 
 [[nodiscard]] auto generate(GlideSweep const& spec) -> std::vector<float>;
diff --git a/tool/RaumAkustik/tool/measurement_recorder.cpp b/tool/RaumAkustik/tool/measurement_recorder.cpp
index 9f21604..c3d3f09 100644
--- a/tool/RaumAkustik/tool/measurement_recorder.cpp
+++ b/tool/RaumAkustik/tool/measurement_recorder.cpp
@@ -82,7 +82,7 @@ void MeasurementRecorder::audioDeviceAboutToStart(juce::AudioIODevice* device)
         .to         = 20'000.0 * si::hertz,
         .curve      = GlideSweep::Curve::Logarithmic,
         .duration   = std::chrono::milliseconds{10'000},
-        .sampleRate = _sampleRate,
+        .sampleRate = _sampleRate * si::hertz,
     });
 }