diff --git a/docs/index.html b/docs/index.html
index b3c6fc7..eac94e5 100644
--- a/docs/index.html
+++ b/docs/index.html
@@ -69,14 +69,14 @@ <h3>Samples</h3>
           </div>
           <div class="audio">
             <audio controls="">
-              <source src="https://raw.githubusercontent.com/kuleshov/audio-super-res/master/samples/msp/4/msp.2.4.pr.wav" type="audio/wav" />
+              <source src="https://raw.githubusercontent.com/kuleshov/audio-super-res/master/samples/msp/4/msp.2.4.sp.wav" type="audio/wav" />
               Your browser does not support the audio element.
             </audio>
             <p style="font-size:14px" align="center">Cubic Baseline</p>
           </div>
           <div class="audio">
             <audio controls="">
-              <source src="https://raw.githubusercontent.com/kuleshov/audio-super-res/master/samples/msp/4/msp.2.4.sp.wav" type="audio/wav" />
+              <source src="https://raw.githubusercontent.com/kuleshov/audio-super-res/master/samples/msp/4/msp.2.4.pr.wav" type="audio/wav" />
               Your browser does not support the audio element.
             </audio>
             <p style="font-size:14px" align="center">Super Resolution</p>
@@ -103,14 +103,14 @@ <h3>Samples</h3>
           </div>
           <div class="audio">
             <audio controls="">
-              <source src="https://raw.githubusercontent.com/kuleshov/audio-super-res/master/samples/msp/4/msp.4.4.pr.wav" type="audio/wav" />
+              <source src="https://raw.githubusercontent.com/kuleshov/audio-super-res/master/samples/msp/4/msp.4.4.sp.wav" type="audio/wav" />
               Your browser does not support the audio element.
             </audio>
             <p style="font-size:14px" align="center">Cubic Baseline</p>
           </div>
           <div class="audio">
             <audio controls="">
-              <source src="https://raw.githubusercontent.com/kuleshov/audio-super-res/master/samples/msp/4/msp.4.4.sp.wav" type="audio/wav" />
+              <source src="https://raw.githubusercontent.com/kuleshov/audio-super-res/master/samples/msp/4/msp.4.4.pr.wav" type="audio/wav" />
               Your browser does not support the audio element.
             </audio>
             <p style="font-size:14px" align="center">Super Resolution</p>
@@ -137,14 +137,14 @@ <h3>Samples</h3>
           </div>
           <div class="audio">
             <audio controls="">
-              <source src="https://raw.githubusercontent.com/kuleshov/audio-super-res/master/samples/msp/4/msp.1.4.pr.wav" type="audio/wav" />
+              <source src="https://raw.githubusercontent.com/kuleshov/audio-super-res/master/samples/msp/4/msp.1.4.sp.wav" type="audio/wav" />
               Your browser does not support the audio element.
             </audio>
             <p style="font-size:14px" align="center">Cubic Baseline</p>
           </div>
           <div class="audio">
             <audio controls="">
-              <source src="https://raw.githubusercontent.com/kuleshov/audio-super-res/master/samples/msp/4/msp.1.4.sp.wav" type="audio/wav" />
+              <source src="https://raw.githubusercontent.com/kuleshov/audio-super-res/master/samples/msp/4/msp.1.4.pr.wav" type="audio/wav" />
               Your browser does not support the audio element.
             </audio>
             <p style="font-size:14px" align="center">Super Resolution</p>
@@ -173,14 +173,14 @@ <h3>Samples</h3>
           </div>
           <div class="audio">
             <audio controls="">
-              <source src="https://raw.githubusercontent.com/kuleshov/audio-super-res/master/samples/sp1/8/sp1.1.8.pr.wav" type="audio/wav" />
+              <source src="https://raw.githubusercontent.com/kuleshov/audio-super-res/master/samples/sp1/8/sp1.1.8.sp.wav" type="audio/wav" />
               Your browser does not support the audio element.
             </audio>
             <p style="font-size:14px" align="center">Cubic Baseline</p>
           </div>
           <div class="audio">
             <audio controls="">
-              <source src="https://raw.githubusercontent.com/kuleshov/audio-super-res/master/samples/sp1/8/sp1.1.8.sp.wav" type="audio/wav" />
+              <source src="https://raw.githubusercontent.com/kuleshov/audio-super-res/master/samples/sp1/8/sp1.1.8.pr.wav" type="audio/wav" />
               Your browser does not support the audio element.
             </audio>
             <p style="font-size:14px" align="center">Super Resolution</p>
diff --git a/docs/spectrogram.png b/docs/spectrogram.png
deleted file mode 100644
index f764441..0000000
Binary files a/docs/spectrogram.png and /dev/null differ