diff --git a/htdocs/openwebrx.js b/htdocs/openwebrx.js
index ea1b281..04598bb 100644
--- a/htdocs/openwebrx.js
+++ b/htdocs/openwebrx.js
@@ -1048,7 +1048,7 @@ function on_ws_recv(evt) {
                         updateSquelch();
 
                         waterfall_init();
-                        initialize_demodulator(initial_demodulator_params);
+                        synchronize_demodulator_init({initialParams: initial_demodulator_params});
                         bookmarks.loadLocalBookmarks();
 
                         waterfall_clear();
@@ -1093,6 +1093,7 @@ function on_ws_recv(evt) {
                         break;
                     case "features":
                         Modes.setFeatures(json['value']);
+                        synchronize_demodulator_init({features: true});
                         break;
                     case "metadata":
                         update_metadata(json['value']);
@@ -1144,6 +1145,7 @@ function on_ws_recv(evt) {
                         break;
                     case 'modes':
                         Modes.setModes(json['value']);
+                        synchronize_demodulator_init({modes: true});
                         demodulator_buttons_update();
                         break;
                     default:
@@ -1539,6 +1541,15 @@ function onAudioStart(success, apiType){
     updateVolume();
 }
 
+var sync_params = {}
+
+function synchronize_demodulator_init(params) {
+    sync_params = $.extend(sync_params, params);
+    if (sync_params.initialParams && sync_params.modes && sync_params.features) {
+        initialize_demodulator(sync_params.initialParams);
+    }
+}
+
 function initialize_demodulator(initialParams) {
     mkscale();
     var params = $.extend(initialParams || {}, validateHash());
@@ -1929,10 +1940,7 @@ function demodulator_buttons_update() {
         var mode = Modes.findByModulation(secondary_demod);
         if (mode) {
             var active = mode.underlying.map(function(u){ return 'openwebrx-button-' + u; });
-            console.info(active);
             $buttons.filter(function(){
-                console.info(this.id);
-                console.info(active.indexOf(this.id));
                 return this.id !== "openwebrx-button-dig" && active.indexOf(this.id) < 0;
             }).addClass('disabled');
         }
diff --git a/owrx/dsp.py b/owrx/dsp.py
index 98d2b00..1f8850e 100644
--- a/owrx/dsp.py
+++ b/owrx/dsp.py
@@ -5,6 +5,7 @@ from owrx.aprs import AprsParser
 from owrx.pocsag import PocsagParser
 from owrx.source import SdrSource
 from owrx.property import PropertyStack, PropertyLayer
+from owrx.modes import Modes
 from csdr import csdr
 import threading
 
@@ -51,6 +52,8 @@ class DspManager(csdr.output):
             "digital_voice_unvoiced_quality",
             "temporary_directory",
             "center_freq",
+            "start_mod",
+            "start_freq",
         ))
 
         self.dsp = csdr.dsp(self)
@@ -71,6 +74,20 @@ class DspManager(csdr.output):
             for parser in self.parsers.values():
                 parser.setDialFrequency(freq)
 
+        if "start_mod" in self.props:
+            self.dsp.set_demodulator(self.props["start_mod"])
+            mode = Modes.findByModulation(self.props["start_mod"])
+
+            if mode and mode.bandpass:
+                self.dsp.set_bpf(mode.bandpass.low_cut, mode.bandpass.high_cut)
+            else:
+                self.dsp.set_bpf(-4000, 4000)
+
+        if "start_freq" in self.props and "center_freq" in self.props:
+            self.dsp.set_offset_freq(self.props["start_freq"] - self.props["center_freq"])
+        else:
+            self.dsp.set_offset_freq(0)
+
         self.subscriptions = [
             self.props.wireProperty("audio_compression", self.dsp.set_audio_compression),
             self.props.wireProperty("fft_compression", self.dsp.set_fft_compression),
@@ -89,8 +106,6 @@ class DspManager(csdr.output):
             self.props.filter("center_freq", "offset_freq").wire(set_dial_freq),
         ]
 
-        self.dsp.set_offset_freq(0)
-        self.dsp.set_bpf(-4000, 4000)
         self.dsp.csdr_dynamic_bufsize = self.props["csdr_dynamic_bufsize"]
         self.dsp.csdr_print_bufsizes = self.props["csdr_print_bufsizes"]
         self.dsp.csdr_through = self.props["csdr_through"]
diff --git a/owrx/modes.py b/owrx/modes.py
index 80fe94b..7617b5f 100644
--- a/owrx/modes.py
+++ b/owrx/modes.py
@@ -70,3 +70,9 @@ class Modes(object):
     @staticmethod
     def getAvailableServices():
         return [m for m in Modes.getAvailableModes() if m.is_service()]
+
+    @staticmethod
+    def findByModulation(modulation):
+        modes = [m for m in Modes.getAvailableModes() if m.modulation == modulation]
+        if modes:
+            return modes[0]
\ No newline at end of file