diff --git a/htdocs/lib/AudioEngine.js b/htdocs/lib/AudioEngine.js
index aa79e72..0445dd3 100644
--- a/htdocs/lib/AudioEngine.js
+++ b/htdocs/lib/AudioEngine.js
@@ -117,14 +117,14 @@ AudioEngine.prototype.start = function(callback) {
 
         setInterval(me.reportStats.bind(me), 1000);
     });
-}
+};
 
 AudioEngine.prototype.isAllowed = function() {
     return this.allowed;
-}
+};
 
 AudioEngine.prototype.reportStats = function() {
-    var stats = {}
+    var stats = {};
     if (this.audioNode.port) {
         this.audioNode.port.postMessage(JSON.stringify({cmd:'getBuffers'}));
     } else {
@@ -132,12 +132,12 @@ AudioEngine.prototype.reportStats = function() {
     }
     stats.audioRate = this.stats.audioSamples;
     var elapsed = new Date() - this.stats.startTime;
-    stats.audioByteRate = this.stats.audioBytes * 1000 / elapsed
+    stats.audioByteRate = this.stats.audioBytes * 1000 / elapsed;
     this.audioReporter(stats);
 
     // sample rate is just measuring the last seconds
     this.stats.audioSamples = 0;
-}
+};
 
 AudioEngine.prototype.resetStats = function() {
     this.stats = {
@@ -145,7 +145,7 @@ AudioEngine.prototype.resetStats = function() {
         audioBytes: 0,
         audioSamples: 0
     };
-}
+};
 
 AudioEngine.prototype.setupResampling = function() { //both at the server and the client
     var output_range_max = 12000;
@@ -166,15 +166,15 @@ AudioEngine.prototype.setupResampling = function() { //both at the server and th
         }
         i++;
     }
-}
+};
 
 AudioEngine.prototype.getOutputRate = function() {
     return this.outputRate;
-}
+};
 
 AudioEngine.prototype.getSampleRate = function() {
     return this.audioContext.sampleRate;
-}
+};
 
 AudioEngine.prototype.pushAudio = function(data) {
     if (!this.audioNode) return;
@@ -197,18 +197,18 @@ AudioEngine.prototype.pushAudio = function(data) {
             this.audioBuffers.push(buffer);
         }
     }
-}
+};
 
 AudioEngine.prototype.setCompression = function(compression) {
     this.compression = compression;
-}
+};
 
 AudioEngine.prototype.setVolume = function(volume) {
     this.gainNode.gain.value = volume;
-}
+};
 
 AudioEngine.prototype.getBuffersize = function() {
     // only available when using ScriptProcessorNode
     if (!this.audioBuffers) return 0;
     return this.audioBuffers.map(function(b){ return b.length; }).reduce(function(a, b){ return a + b; }, 0);
-}
+};
diff --git a/htdocs/lib/AudioProcessor.js b/htdocs/lib/AudioProcessor.js
index 0902c50..24c7b9e 100644
--- a/htdocs/lib/AudioProcessor.js
+++ b/htdocs/lib/AudioProcessor.js
@@ -2,14 +2,14 @@ class OwrxAudioProcessor extends AudioWorkletProcessor {
     constructor(options){
         super(options);
         // initialize ringbuffer, make sure it aligns with the expected buffer size of 128
-        this.bufferSize = Math.round(options.processorOptions.maxBufferSize / 128) * 128
+        this.bufferSize = Math.round(options.processorOptions.maxBufferSize / 128) * 128;
         this.audioBuffer = new Float32Array(this.bufferSize);
         this.inPos = 0;
         this.outPos = 0;
         this.port.addEventListener('message', (m) => {
             if (typeof(m.data) === 'string') {
                 const json = JSON.parse(m.data);
-                if (json.cmd && json.cmd == 'getBuffers') {
+                if (json.cmd && json.cmd === 'getBuffers') {
                     this.reportBuffers();
                 }
             } else {
@@ -31,7 +31,7 @@ class OwrxAudioProcessor extends AudioWorkletProcessor {
         this.port.addEventListener('messageerror', console.error);
         this.port.start();
     }
-    process(inputs, outputs, parameters) {
+    process(inputs, outputs) {
         const samples = Math.min(128, this.remaining());
         outputs[0].forEach((output) => {
             output.set(this.audioBuffer.subarray(this.outPos, this.outPos + samples));
diff --git a/htdocs/openwebrx.js b/htdocs/openwebrx.js
index 58ff2d5..114cbef 100644
--- a/htdocs/openwebrx.js
+++ b/htdocs/openwebrx.js
@@ -157,6 +157,10 @@ function updateSquelch() {
 
 var waterfall_min_level;
 var waterfall_max_level;
+var waterfall_min_level_default;
+var waterfall_max_level_default;
+var waterfall_colors;
+var waterfall_auto_level_margin;
 
 function updateWaterfallColors(which) {
     var wfmax = e("openwebrx-waterfall-color-max");
@@ -1452,10 +1456,6 @@ function waterfall_measure_minmax_do(what) {
     waterfall_measure_minmax_max = Math.max(waterfall_measure_minmax_max, Math.max.apply(Math, what));
 }
 
-function waterfall_measure_minmax_print() {
-    console.log("Waterfall | min = " + waterfall_measure_minmax_min.toString() + " dB | max = " + waterfall_measure_minmax_max.toString() + " dB");
-}
-
 function on_ws_opened() {
     ws.send("SERVER DE CLIENT client=openwebrx.js type=receiver");
     divlog("WebSocket opened to " + ws.url);