diff --git a/sndlock.cpp b/sndlock.cpp
index 9128b62..864fc1a 100644
--- a/sndlock.cpp
+++ b/sndlock.cpp
@@ -38,8 +38,10 @@ static float in_wave[HIST_DEPTH];
 
 static std::atomic<int> multiplier[SND_PCHAN];
 static std::atomic<double> lpf_bandwidth[SND_PCHAN];
+static std::atomic<double> li_mag[SND_PCHAN];
+static std::atomic<double> li_phase[SND_PCHAN];
 static std::mutex li_hist_mutex;
-static std::atomic<bool> li_hist_pause[SND_PCHAN];
+static std::atomic<bool> li_hist_hold[SND_PCHAN];
 static float li_hist_mag[SND_PCHAN][HIST_DEPTH];
 static float li_hist_phase[SND_PCHAN][HIST_DEPTH];
 
@@ -202,16 +204,20 @@ static void dsp_thread()
 
                 for(int j=0;j<SND_PCHAN;j++) {
                     std::complex<double> lockin_out = lockin[j].update(sample);
+                    double mag = std::abs(lockin_out);
+                    double phase = std::arg(lockin_out);
 
-                    if(!li_hist_pause[j]) {
+                    li_mag[j] = mag;
+                    li_phase[j] = phase;
+                    if(!li_hist_hold[j]) {
                         li_count[j]++;
                         if(li_count[j] == 200) {
                             li_count[j] = 0;
                             std::lock_guard<std::mutex> guard(li_hist_mutex);
                             std::memmove(&li_hist_mag[j][0], &li_hist_mag[j][1], (HIST_DEPTH-1)*sizeof(float));
-                            li_hist_mag[j][HIST_DEPTH-1] = std::abs(lockin_out);
+                            li_hist_mag[j][HIST_DEPTH-1] = mag;
                             std::memmove(&li_hist_phase[j][0], &li_hist_phase[j][1], (HIST_DEPTH-1)*sizeof(float));
-                            li_hist_phase[j][HIST_DEPTH-1] = std::arg(lockin_out);
+                            li_hist_phase[j][HIST_DEPTH-1] = phase;
                         }
                     }
                 }
@@ -379,11 +385,11 @@ int main(int argc, char* argv[])
                 multiplier[i] = multiplier_l;
                 ImGui::SameLine();
                 ImGui::Text("/");
-                bool pause_l = li_hist_pause[i];
+                bool hold_l = li_hist_hold[i];
                 ImGui::SameLine();
-                sprintf(str, "pause##%d", i);
-                ImGui::Checkbox(str, &pause_l);
-                li_hist_pause[i] = pause_l;
+                sprintf(str, "hold plot##%d", i);
+                ImGui::Checkbox(str, &hold_l);
+                li_hist_hold[i] = hold_l;
                 sprintf(str, "LPF BW##%d", i);
                 float lpf_bandwidth_l = lpf_bandwidth[i];
                 ImGui::SliderFloat(str, &lpf_bandwidth_l, 0.5f, 200.0f);
@@ -397,8 +403,8 @@ int main(int argc, char* argv[])
                     ImGui::PlotLines(str, li_hist_mag[i], HIST_DEPTH, 0, 0, -0.0f, 0.1f*plot_scale[i], ImVec2(0.0f, 200.0f));
                     sprintf(str, "phase##%d", i);
                     ImGui::PlotLines(str, li_hist_phase[i], HIST_DEPTH, 0, 0, -M_PI, M_PI, ImVec2(0.0f, 200.0f));
-                    ImGui::Text("values: %8.5f %8.5f rad", li_hist_mag[i][511], li_hist_phase[i][511]);
                 }
+                ImGui::Text("values: %8.5f %8.5f rad", (double)li_mag[i], (double)li_phase[i]);
             }
         }