diff --git a/config_webrx.py b/config_webrx.py
index ea693c1..b819ad2 100644
--- a/config_webrx.py
+++ b/config_webrx.py
@@ -70,8 +70,11 @@ sdrhu_public_listing = False
 dsp_plugin="csdr"
 fft_fps=9
 fft_size=4096
+fft_overlap=0.3
 samp_rate = 250000
 
+fft_averages=int(round(1.0 * samp_rate / fft_size / fft_fps / (1.0 - fft_overlap)))
+
 center_freq = 145525000
 rf_gain = 5 #in dB. For an RTL-SDR, rf_gain=0 will set the tuner to auto gain mode, else it will be in manual gain mode.
 ppm = 0
@@ -146,9 +149,9 @@ iq_server_port = 4951 #TCP port for ncat to listen on. It will send I/Q data ove
 
 #access_log = "~/openwebrx_access.log"
 
-waterfall_colors = "[0x000000ff,0x2e6893ff, 0x69a5d0ff, 0x214b69ff, 0x9dc4e0ff,  0xfff775ff, 0xff8a8aff, 0xb20000ff]"
-waterfall_min_level = -115 #in dB
-waterfall_max_level = 0
+waterfall_colors = "[0x000000ff,0x0000ffff,0x00ffffff,0x00ff00ff,0xffff00ff,0xff0000ff,0xff00ffff,0xffffffff]"
+waterfall_min_level = -88 #in dB
+waterfall_max_level = -20
 #A guide is available to help you set these values: https://github.com/simonyiszk/openwebrx/wiki/Calibrating-waterfall-display-levels
 
 #Warning! The settings below are very experimental.
diff --git a/htdocs/openwebrx.js b/htdocs/openwebrx.js
index 7c9ab96..fd4833a 100644
--- a/htdocs/openwebrx.js
+++ b/htdocs/openwebrx.js
@@ -1018,7 +1018,7 @@ function canvas_mousewheel(evt)
 
 
 zoom_max_level_hps=33; //Hz/pixel
-zoom_levels_count=5;
+zoom_levels_count=14;
 
 function get_zoom_coeff_from_hps(hps)
 {
@@ -1040,8 +1040,10 @@ function mkzoomlevels()
 	zoom_levels=[1];
 	maxc=get_zoom_coeff_from_hps(zoom_max_level_hps);
 	if(maxc<1) return;
+	// logarithmic interpolation
+	zoom_ratio = Math.pow(maxc, 1/zoom_levels_count);
 	for(i=1;i<zoom_levels_count;i++)
-		zoom_levels.push(1+(maxc-1)*(i/(zoom_levels_count-1)));
+		zoom_levels.push(Math.pow(zoom_ratio, i));
 }
 
 function zoom_step(out, where, onscreen)
diff --git a/openwebrx.py b/openwebrx.py
index 45df673..b770269 100755
--- a/openwebrx.py
+++ b/openwebrx.py
@@ -287,6 +287,7 @@ def spectrum_thread_function():
 	dsp.set_samp_rate(cfg.samp_rate)
 	dsp.set_fft_size(cfg.fft_size)
 	dsp.set_fft_fps(cfg.fft_fps)
+	dsp.set_fft_averages(cfg.fft_averages)
 	dsp.set_fft_compression(cfg.fft_compression)
 	dsp.set_format_conversion(cfg.format_conversion)
 	apply_csdr_cfg_to_dsp(dsp)
diff --git a/plugins/dsp/csdr/plugin.py b/plugins/dsp/csdr/plugin.py
index be31bfa..6597330 100644
--- a/plugins/dsp/csdr/plugin.py
+++ b/plugins/dsp/csdr/plugin.py
@@ -51,6 +51,7 @@ class dsp_plugin:
 		self.csdr_print_bufsizes = False
 		self.csdr_through = False
 		self.squelch_level = 0
+		self.fft_averages = 50
 
 	def chain(self,which):
 		any_chain_base="ncat -v 127.0.0.1 {nc_port} | "
@@ -58,7 +59,11 @@ class dsp_plugin:
 		if self.csdr_through: any_chain_base+="csdr through | "
 		any_chain_base+=self.format_conversion+(" | " if  self.format_conversion!="" else "") ##"csdr flowcontrol {flowcontrol} auto 1.5 10 | "
 		if which == "fft":
-			fft_chain_base = any_chain_base+"csdr fft_cc {fft_size} {fft_block_size} | csdr logpower_cf -70 | csdr fft_exchange_sides_ff {fft_size}"
+			if self.fft_averages > 1:
+				fft_chain_base = any_chain_base+"csdr fft_cc {fft_size} {fft_block_size} | csdr logaveragepower_cf -70 {fft_size} {fft_averages} | csdr fft_exchange_sides_ff {fft_size}"
+			else:
+				fft_chain_base = any_chain_base+"csdr fft_cc {fft_size} {fft_block_size} | csdr logpower_cf -70 | csdr fft_exchange_sides_ff {fft_size}"
+
 			if self.fft_compression=="adpcm":
 				return fft_chain_base+" | csdr compress_fft_adpcm_f_u8 {fft_size}"
 			else:
@@ -117,8 +122,12 @@ class dsp_plugin:
 		#to change this, restart is required
 		self.fft_fps=fft_fps
 
+	def set_fft_averages(self,fft_averages):
+		#to change this, restart is required
+		self.fft_averages=fft_averages
+
 	def fft_block_size(self):
-		return self.samp_rate/self.fft_fps
+		return self.samp_rate/self.fft_fps/self.fft_averages
 
 	def set_format_conversion(self,format_conversion):
 		self.format_conversion=format_conversion
@@ -181,7 +190,7 @@ class dsp_plugin:
 
 		#run the command
 		command=command_base.format( bpf_pipe=self.bpf_pipe, shift_pipe=self.shift_pipe, decimation=self.decimation, \
-			last_decimation=self.last_decimation, fft_size=self.fft_size, fft_block_size=self.fft_block_size(), \
+			last_decimation=self.last_decimation, fft_size=self.fft_size, fft_block_size=self.fft_block_size(), fft_averages=self.fft_averages, \
 			bpf_transition_bw=float(self.bpf_transition_bw)/self.if_samp_rate(), ddc_transition_bw=self.ddc_transition_bw(), \
 			flowcontrol=int(self.samp_rate*2), start_bufsize=self.base_bufsize*self.decimation, nc_port=self.nc_port, \
 			squelch_pipe=self.squelch_pipe, smeter_pipe=self.smeter_pipe )