diff --git a/firmware/application/baseband_api.cpp b/firmware/application/baseband_api.cpp
index 70a8235b..115f52d0 100644
--- a/firmware/application/baseband_api.cpp
+++ b/firmware/application/baseband_api.cpp
@@ -100,6 +100,15 @@ void set_afsk_data(const char message_data[], const uint32_t afsk_samples_per_bi
 	send_message(&message);			
 }
 
+void set_pwmrssi(int32_t avg, bool enabled) {
+	const PWMRSSIConfigureMessage message {
+		enabled,
+		1000,	// 1kHz
+		avg
+	};
+	send_message(&message);	
+}
+
 static bool baseband_image_running = false;
 
 void run_image(const portapack::spi_flash::image_tag_t image_tag) {
diff --git a/firmware/application/baseband_api.hpp b/firmware/application/baseband_api.hpp
index 5b04fae5..7797fd52 100644
--- a/firmware/application/baseband_api.hpp
+++ b/firmware/application/baseband_api.hpp
@@ -53,6 +53,7 @@ struct WFMConfig {
 };
 
 void set_xylos_data(const char ccir_message[]);
+void set_pwmrssi(int32_t avg, bool enabled);
 void set_afsk_data(const char message_data[], const uint32_t afsk_samples_per_bit, const uint32_t afsk_phase_inc_mark,
 					const uint32_t afsk_phase_inc_space, const uint8_t afsk_repeat, const uint32_t afsk_bw,
 					const bool afsk_alt_format);
diff --git a/firmware/application/bitmap.hpp b/firmware/application/bitmap.hpp
index 78f0fa9f..2a727780 100644
--- a/firmware/application/bitmap.hpp
+++ b/firmware/application/bitmap.hpp
@@ -1,5 +1,6 @@
 /*
  * Copyright (C) 2015 Jared Boone, ShareBrained Technology, Inc.
+ * Copyright (C) 2016 Furrtek
  *
  * This file is part of PortaPack.
  *
@@ -26,6 +27,48 @@
 
 namespace ui {
 
+/*
+00000000 00000000 00000000
+11110001 11100111 10111110
+10001010 00001000 00001000
+10001010 00001000 00001000
+11110001 11000111 00001000
+10010000 00100000 10001000
+10001000 00100000 10001000
+10001011 11001111 00111110
+00000000 00000000 00000000
+11111100 01111000 01111000
+10000100 01001000 01001000
+10000100 01001000 01001000
+10000100 01001000 01001000
+10000100 01001000 01001000
+10000100 01001000 01001000
+10000111 11001111 11001110
+*/
+
+static constexpr uint8_t bitmap_rssipwm_data[] = {
+	0x00, 0x00, 0x00,
+	0x8F, 0xE7, 0x7D,
+	0x51, 0x10, 0x10,
+	0x51, 0x10, 0x10,
+	0x8F, 0xE3, 0x10,
+	0x09, 0x04, 0x11,
+	0x11, 0x04, 0x11,
+	0xD1, 0xF3, 0x7C,
+	0x00, 0x00, 0x00,
+	0x3F, 0x1E, 0x1E,
+	0x21, 0x12, 0x12,
+	0x21, 0x12, 0x12,
+	0x21, 0x12, 0x12,
+	0x21, 0x12, 0x12,
+	0x21, 0x12, 0x12,
+	0xE1, 0xF3, 0x73
+};
+
+static constexpr Bitmap bitmap_rssipwm {
+	{ 24, 16 }, bitmap_rssipwm_data
+};
+
 static constexpr uint8_t bitmap_keyboard_data[] = {
 	0x00, 0x00,
 	0x00, 0x00,
diff --git a/firmware/application/main.cpp b/firmware/application/main.cpp
index 23058491..6501dcc4 100755
--- a/firmware/application/main.cpp
+++ b/firmware/application/main.cpp
@@ -1,5 +1,6 @@
 /*
  * Copyright (C) 2014 Jared Boone, ShareBrained Technology, Inc.
+ * Copyright (C) 2016 Furrtek
  *
  * This file is part of PortaPack.
  *
diff --git a/firmware/application/ui_lcr.cpp b/firmware/application/ui_lcr.cpp
index fd758bc1..ca8f5870 100644
--- a/firmware/application/ui_lcr.cpp
+++ b/firmware/application/ui_lcr.cpp
@@ -21,22 +21,12 @@
  */
 
 #include "ui_lcr.hpp"
-#include "ui_receiver.hpp"
 #include "ui_afsksetup.hpp"
 #include "ui_debug.hpp"
 
-#include "ch.h"
-
-#include "ff.h"
 #include "baseband_api.hpp"
-#include "hackrf_gpio.hpp"
-#include "portapack.hpp"
-#include "event_m0.hpp"
-
 #include "string_format.hpp"
 
-#include "hackrf_hal.hpp"
-#include "portapack_shared_memory.hpp"
 #include "portapack_persistent_memory.hpp"
 
 #include <cstring>
@@ -231,6 +221,7 @@ void LCRView::on_txdone(int n) {
 	char str[16];
 	
 	if (n > 0) {
+		// Repeating...
 		repeat_index = n + 1;
 		if (tx_mode == SCAN) {
 			scan_progress++;
@@ -239,9 +230,11 @@ void LCRView::on_txdone(int n) {
 			update_progress();
 		}
 	} else {
+		// Done transmitting
 		if ((tx_mode == SCAN) && (scan_index < (LCR_SCAN_COUNT - 1))) {
 			transmitter_model.disable();
 			if (abort_scan) {
+				// Kill scan process
 				strcpy(str, "Abort @");
 				strcat(str, rgsb);
 				text_status.set(str);
@@ -415,16 +408,17 @@ LCRView::LCRView(NavigationView& nav) {
 	};
 
 	button_clear.on_select = [this, &nav](Button&) {
+		uint8_t n;
+		
 		if (tx_mode == IDLE) {
 			memset(litteral, 0, 5 * 8);
-			options_ec.set_selected_index(0);
-			checkbox_am_a.set_value(true);
-			checkbox_am_b.set_value(true);
-			checkbox_am_c.set_value(true);
-			checkbox_am_d.set_value(true);
-			checkbox_am_e.set_value(true);
+			options_ec.set_selected_index(0);	// Auto
+			for (n = 0; n < 5; n++)
+				checkboxes[n].set_value(true);
 			set_dirty();
 			start_tx(false);
+		} else if (tx_mode == SCAN) {
+			abort_scan = true;
 		}
 	};
 }
diff --git a/firmware/application/ui_lcr.hpp b/firmware/application/ui_lcr.hpp
index ae6e9137..860bafcc 100644
--- a/firmware/application/ui_lcr.hpp
+++ b/firmware/application/ui_lcr.hpp
@@ -22,16 +22,8 @@
 
 #include "ui.hpp"
 #include "ui_widget.hpp"
-#include "ui_painter.hpp"
-#include "ui_menu.hpp"
-#include "ui_navigation.hpp"
 #include "ui_textentry.hpp"
-#include "ui_font_fixed_8x16.hpp"
-#include "clock_manager.hpp"
 #include "message.hpp"
-#include "rf_path.hpp"
-#include "max2837.hpp"
-#include "volume.hpp"
 #include "transmitter_model.hpp"
 
 namespace ui {
@@ -149,36 +141,6 @@ private:
 		"TX setup"
 	};
 	
-	Checkbox checkbox_am_a {
-		{ 16, 64 },
-		0,
-		""
-	};
-	
-	Checkbox checkbox_am_b {
-		{ 16, 96 },
-		0,
-		""
-	};
-	
-	Checkbox checkbox_am_c {
-		{ 16, 128 },
-		0,
-		""
-	};
-	
-	Checkbox checkbox_am_d {
-		{ 16, 160 },
-		0,
-		""
-	};
-	
-	Checkbox checkbox_am_e {
-		{ 16, 192 },
-		0,
-		""
-	};
-	
 	Button button_lcrdebug {
 		{ 168, 216, 56, 24 },
 		"DEBUG"
diff --git a/firmware/application/ui_navigation.cpp b/firmware/application/ui_navigation.cpp
index a90f39d6..30e45aaf 100644
--- a/firmware/application/ui_navigation.cpp
+++ b/firmware/application/ui_navigation.cpp
@@ -238,14 +238,15 @@ ReceiverMenuView::ReceiverMenuView(NavigationView& nav) {
 /* SystemMenuView ********************************************************/
 
 SystemMenuView::SystemMenuView(NavigationView& nav) {
-	add_items<12>({ {
+	add_items<11>({ {
 		{ "Play dead",		ui::Color::red(),  		[&nav](){ nav.push<PlayDeadView>(false); } },
 		{ "Receiver                  RX", 	ui::Color::cyan(),		[&nav](){ nav.push<ReceiverMenuView>(); } },
+		{ "Capture                   RX",	ui::Color::orange(),	[&nav](){ nav.push<CaptureAppView>(); } },
 		{ "Close Call                RX",	ui::Color::cyan(),		[&nav](){ nav.push<CloseCallView>(); } },
-		{ "Pokemon GO Away           TX", 	ui::Color::blue(),  	[&nav](){ nav.push<JammerView>(); } },
+		//{ "Pokemon GO Away           TX", 	ui::Color::blue(),  	[&nav](){ nav.push<JammerView>(); } },
 		//{ "Soundboard                TX", 	ui::Color::yellow(),  	[&nav](){ nav.push<LoadModuleView>(md5_baseband_tx, SoundBoard); } },
 		//{ "Audio                     TX", 	ui::Color::yellow(),  	[&nav](){ nav.push<LoadModuleView>(md5_baseband_tx, AudioTX); } },
-		{ "Frequency manager", 				ui::Color::white(),  	[&nav](){ nav.push<FreqManView>(); } },
+		//{ "Frequency manager", 				ui::Color::white(),  	[&nav](){ nav.push<FreqManView>(); } },
 		//{ "EPAR                      TX", 	ui::Color::green(),  	[&nav](){ nav.push<LoadModuleView>(md5_baseband_tx, EPAR); } },
 		{ "Xylos                     TX", 	ui::Color::green(),  	[&nav](){ nav.push<XylosView>(); } },
 		{ "TEDI/LCR                  TX", 	ui::Color::orange(),  	[&nav](){ nav.push<LCRView>(); } },
diff --git a/firmware/application/ui_record_view.cpp b/firmware/application/ui_record_view.cpp
index 695a454d..186c014b 100644
--- a/firmware/application/ui_record_view.cpp
+++ b/firmware/application/ui_record_view.cpp
@@ -22,6 +22,8 @@
 #include "ui_record_view.hpp"
 
 #include "portapack.hpp"
+#include "message.hpp"
+#include "portapack_shared_memory.hpp"
 using namespace portapack;
 
 #include "file.hpp"
@@ -176,6 +178,7 @@ RecordView::RecordView(
 {
 	add_children({ {
 		&rect_background,
+		&button_pwmrssi,
 		&button_record,
 		&text_record_filename,
 		&text_record_dropped,
@@ -183,6 +186,10 @@ RecordView::RecordView(
 	} });
 
 	rect_background.set_parent_rect({ { 0, 0 }, size() });
+	
+	button_pwmrssi.on_select = [this](ImageButton&) {
+		this->toggle_pwmrssi();
+	};
 
 	button_record.on_select = [this](ImageButton&) {
 		this->toggle();
@@ -228,6 +235,24 @@ void RecordView::toggle() {
 	}
 }
 
+void RecordView::toggle_pwmrssi() {
+	pwmrssi_enabled = !pwmrssi_enabled;
+	
+	// Send to RSSI widget
+	const PWMRSSIConfigureMessage message {
+		pwmrssi_enabled,
+		1000,
+		0
+	};
+	shared_memory.application_queue.push(message);
+	
+	if( !pwmrssi_enabled ) {
+		button_pwmrssi.set_foreground(Color::orange());
+	} else {
+		button_pwmrssi.set_foreground(Color::green());
+	}
+}
+
 void RecordView::start() {
 	stop();
 
@@ -342,6 +367,10 @@ void RecordView::update_status_display() {
 		const auto s = to_string_dec_uint(dropped_percent, 2, ' ') + "\%";
 		text_record_dropped.set(s);
 	}
+	
+	if (pwmrssi_enabled) {
+		button_pwmrssi.invert_colors();
+	}
 
 	if( sampling_rate ) {
 		const auto space_info = std::filesystem::space("");
diff --git a/firmware/application/ui_record_view.hpp b/firmware/application/ui_record_view.hpp
index 023fb0d5..985e5eee 100644
--- a/firmware/application/ui_record_view.hpp
+++ b/firmware/application/ui_record_view.hpp
@@ -64,6 +64,7 @@ public:
 
 private:
 	void toggle();
+	void toggle_pwmrssi();
 	Optional<File::Error> write_metadata_file(const std::string& filename);
 
 	void on_tick_second();
@@ -72,6 +73,7 @@ private:
 	void handle_capture_thread_done(const File::Error error);
 	void handle_error(const File::Error error);
 
+	bool pwmrssi_enabled = false;
 	const std::string filename_stem_pattern;
 	const FileType file_type;
 	const size_t write_size;
@@ -82,16 +84,23 @@ private:
 	Rectangle rect_background {
 		Color::black()
 	};
+	
+	ImageButton button_pwmrssi {
+		{ 2, 0 * 16, 3 * 8, 1 * 16 },
+		&bitmap_rssipwm,
+		Color::orange(),
+		Color::black()
+	};
 
 	ImageButton button_record {
-		{ 0 * 8, 0 * 16, 2 * 8, 1 * 16 },
+		{ 4 * 8, 0 * 16, 2 * 8, 1 * 16 },
 		&bitmap_record,
 		Color::red(),
 		Color::black()
 	};
 
 	Text text_record_filename {
-		{ 3 * 8, 0 * 16, 8 * 8, 16 },
+		{ 7 * 8, 0 * 16, 8 * 8, 16 },
 		"",
 	};
 
diff --git a/firmware/application/ui_rssi.cpp b/firmware/application/ui_rssi.cpp
index ab506906..c494e089 100644
--- a/firmware/application/ui_rssi.cpp
+++ b/firmware/application/ui_rssi.cpp
@@ -21,6 +21,7 @@
 
 #include "ui_rssi.hpp"
 
+#include "baseband_api.hpp"
 #include "utility.hpp"
 
 #include <algorithm>
@@ -88,6 +89,17 @@ void RSSI::paint(Painter& painter) {
 		r4,
 		Color::black()
 	);
+	
+	if (pwmrssi_enabled) {
+		const range_t<int> pwmrssi_avg_range { 0, 96 };
+		const auto pwmrssi_avg = pwmrssi_avg_range.clip((avg_ - raw_min) * 96 / raw_delta);
+		baseband::set_pwmrssi(pwmrssi_avg, true);
+	}
+}
+
+void RSSI::set_pwmrssi(bool enabled) {
+	pwmrssi_enabled = enabled;
+	if (!enabled) baseband::set_pwmrssi(0, false);
 }
 
 void RSSI::on_statistics_update(const RSSIStatistics& statistics) {
diff --git a/firmware/application/ui_rssi.hpp b/firmware/application/ui_rssi.hpp
index 08eeadcb..d07f26b0 100644
--- a/firmware/application/ui_rssi.hpp
+++ b/firmware/application/ui_rssi.hpp
@@ -46,11 +46,13 @@ public:
 	}
 
 	void paint(Painter& painter) override;
-
+	
 private:
 	int32_t min_;
 	int32_t avg_;
 	int32_t max_;
+	
+	bool pwmrssi_enabled = false;
 
 	MessageHandlerRegistration message_handler_stats {
 		Message::ID::RSSIStatistics,
@@ -58,8 +60,17 @@ private:
 			this->on_statistics_update(static_cast<const RSSIStatisticsMessage*>(p)->statistics);
 		}
 	};
+	
+	MessageHandlerRegistration message_handler_pwmrssi {
+		Message::ID::PWMRSSIConfigure,
+		[this](const Message* const p) {
+			const auto message = *reinterpret_cast<const PWMRSSIConfigureMessage*>(p);
+			this->set_pwmrssi(message.enabled);
+		}
+	};
 
 	void on_statistics_update(const RSSIStatistics& statistics);
+	void set_pwmrssi(bool enabled);
 };
 
 }
diff --git a/firmware/application/ui_xylos.cpp b/firmware/application/ui_xylos.cpp
index 705467e9..ceec2e5b 100644
--- a/firmware/application/ui_xylos.cpp
+++ b/firmware/application/ui_xylos.cpp
@@ -21,20 +21,11 @@
  */
 
 #include "ui_xylos.hpp"
-
-#include "ch.h"
-#include "hackrf_hal.hpp"
-
-#include "event_m0.hpp"
-#include "audio.hpp"
 #include "ui_alphanum.hpp"
-#include "ff.h"
-#include "hackrf_gpio.hpp"
+
 #include "portapack.hpp"
 #include "baseband_api.hpp"
-
-#include "hackrf_hal.hpp"
-#include "portapack_shared_memory.hpp"
+//#include "audio.hpp"
 #include "portapack_persistent_memory.hpp"
 
 #include <cstring>
diff --git a/firmware/application/ui_xylos.hpp b/firmware/application/ui_xylos.hpp
index 8cba3de2..287578d5 100644
--- a/firmware/application/ui_xylos.hpp
+++ b/firmware/application/ui_xylos.hpp
@@ -22,9 +22,7 @@
 
 #include "ui.hpp"
 #include "ui_widget.hpp"
-#include "ui_painter.hpp"
 #include "ui_navigation.hpp"
-#include "ui_menu.hpp"
 #include "ui_font_fixed_8x16.hpp"
 
 #include "bulb_on_bmp.hpp"
@@ -32,8 +30,7 @@
 #include "bulb_ignore_bmp.hpp"
 
 #include "message.hpp"
-#include "max2837.hpp"
-#include "volume.hpp"
+//#include "volume.hpp"
 #include "transmitter_model.hpp"
 //#include "receiver_model.hpp"
 #include "portapack.hpp"
diff --git a/firmware/baseband/proc_nfm_audio.cpp b/firmware/baseband/proc_nfm_audio.cpp
index 5020d8da..5eedc5f7 100644
--- a/firmware/baseband/proc_nfm_audio.cpp
+++ b/firmware/baseband/proc_nfm_audio.cpp
@@ -32,7 +32,7 @@ void NarrowbandFMAudio::execute(const buffer_c8_t& buffer) {
 	if( !configured ) {
 		return;
 	}
-
+	
 	const auto decim_0_out = decim_0.execute(buffer, dst_buffer);
 	const auto decim_1_out = decim_1.execute(decim_0_out, dst_buffer);
 	const auto channel_out = channel_filter.execute(decim_1_out, dst_buffer);
@@ -40,8 +40,23 @@ void NarrowbandFMAudio::execute(const buffer_c8_t& buffer) {
 	feed_channel_stats(channel_out);
 	channel_spectrum.feed(channel_out, channel_filter_pass_f, channel_filter_stop_f);
 
-	auto audio = demod.execute(channel_out, audio_buffer);
-	audio_output.write(audio);
+	if ( !pwmrssi_enabled ) {
+		auto audio = demod.execute(channel_out, audio_buffer);
+		audio_output.write(audio);
+	} else {
+		for (c = 0; c < 32; c++) {
+			if (synth_acc < pwmrssi_avg)
+				pwmrssi_audio_buffer.p[c] = 32767;
+			else
+				pwmrssi_audio_buffer.p[c] = -32768;
+			if (synth_acc < 30)		// 24kHz / 30 = 800Hz (TODO: use pwmrssi_freq !)
+				synth_acc++;
+			else
+				synth_acc = 0;
+		}
+
+		audio_output.write(pwmrssi_audio_buffer);
+	}
 }
 
 void NarrowbandFMAudio::on_message(const Message* const message) {
@@ -58,6 +73,10 @@ void NarrowbandFMAudio::on_message(const Message* const message) {
 	case Message::ID::CaptureConfig:
 		capture_config(*reinterpret_cast<const CaptureConfigMessage*>(message));
 		break;
+	
+	case Message::ID::PWMRSSIConfigure:
+		pwmrssi_config(*reinterpret_cast<const PWMRSSIConfigureMessage*>(message));
+		break;
 		
 	default:
 		break;
@@ -83,11 +102,19 @@ void NarrowbandFMAudio::configure(const NBFMConfigureMessage& message) {
 	channel_filter_pass_f = message.channel_filter.pass_frequency_normalized * channel_filter_input_fs;
 	channel_filter_stop_f = message.channel_filter.stop_frequency_normalized * channel_filter_input_fs;
 	channel_spectrum.set_decimation_factor(std::floor(channel_filter_output_fs / (channel_filter_pass_f + channel_filter_stop_f)));
-	audio_output.configure(message.audio_hpf_config, message.audio_deemph_config, 0.8f);
+	audio_output.configure(message.audio_hpf_config, message.audio_deemph_config);	// , 0.8f
 
+	synth_acc = 0;
+	
 	configured = true;
 }
 
+void NarrowbandFMAudio::pwmrssi_config(const PWMRSSIConfigureMessage& message) {
+	pwmrssi_enabled = message.enabled;
+	pwmrssi_freq = message.freq;
+	pwmrssi_avg = message.avg / 3;
+}
+
 void NarrowbandFMAudio::capture_config(const CaptureConfigMessage& message) {
 	if( message.config ) {
 		audio_output.set_stream(std::make_unique<StreamInput>(message.config));
diff --git a/firmware/baseband/proc_nfm_audio.hpp b/firmware/baseband/proc_nfm_audio.hpp
index 4c39d78c..b71281d8 100644
--- a/firmware/baseband/proc_nfm_audio.hpp
+++ b/firmware/baseband/proc_nfm_audio.hpp
@@ -56,6 +56,12 @@ private:
 		audio.data(),
 		audio.size()
 	};
+	
+	std::array<int16_t, 32> pwm;
+	const buffer_s16_t pwmrssi_audio_buffer {
+		(int16_t*)pwm.data(),
+		sizeof(pwm) / sizeof(int16_t)
+	};
 
 	dsp::decimate::FIRC8xR16x24FS4Decim8 decim_0;
 	dsp::decimate::FIRC16xR16x32Decim8 decim_1;
@@ -68,8 +74,14 @@ private:
 	AudioOutput audio_output;
 
 	SpectrumCollector channel_spectrum;
+	
+	unsigned int c, synth_acc = 0;
+	bool pwmrssi_enabled = false;
+	uint32_t pwmrssi_freq;
+	uint32_t pwmrssi_avg;
 
 	bool configured { false };
+	void pwmrssi_config(const PWMRSSIConfigureMessage& message);
 	void configure(const NBFMConfigureMessage& message);
 	void capture_config(const CaptureConfigMessage& message);
 };
diff --git a/firmware/baseband/proc_wfm_audio.cpp b/firmware/baseband/proc_wfm_audio.cpp
index 2e553a7d..5771854d 100644
--- a/firmware/baseband/proc_wfm_audio.cpp
+++ b/firmware/baseband/proc_wfm_audio.cpp
@@ -31,7 +31,7 @@ void WidebandFMAudio::execute(const buffer_c8_t& buffer) {
 	if( !configured ) {
 		return;
 	}
-
+	
 	const auto decim_0_out = decim_0.execute(buffer, dst_buffer);
 	const auto channel = decim_1.execute(decim_0_out, dst_buffer);
 
@@ -44,32 +44,49 @@ void WidebandFMAudio::execute(const buffer_c8_t& buffer) {
 		channel_spectrum.feed(channel, channel_filter_pass_f, channel_filter_stop_f);
 	}
 
-	/* 384kHz complex<int16_t>[256]
-	 * -> FM demodulation
-	 * -> 384kHz int16_t[256] */
-	/* TODO: To improve adjacent channel rejection, implement complex channel filter:
-	 *		pass < +/- 100kHz, stop > +/- 200kHz
-	 */
+	if ( !pwmrssi_enabled ) {
+		/* 384kHz complex<int16_t>[256]
+		 * -> FM demodulation
+		 * -> 384kHz int16_t[256] */
+		/* TODO: To improve adjacent channel rejection, implement complex channel filter:
+		 *		pass < +/- 100kHz, stop > +/- 200kHz
+		 */
 
-	auto audio_oversampled = demod.execute(channel, work_audio_buffer);
+		auto audio_oversampled = demod.execute(channel, work_audio_buffer);
 
-	/* 384kHz int16_t[256]
-	 * -> 4th order CIC decimation by 2, gain of 1
-	 * -> 192kHz int16_t[128] */
-	auto audio_4fs = audio_dec_1.execute(audio_oversampled, work_audio_buffer);
+		/* 384kHz int16_t[256]
+		 * -> 4th order CIC decimation by 2, gain of 1
+		 * -> 192kHz int16_t[128] */
+		auto audio_4fs = audio_dec_1.execute(audio_oversampled, work_audio_buffer);
 
-	/* 192kHz int16_t[128]
-	 * -> 4th order CIC decimation by 2, gain of 1
-	 * -> 96kHz int16_t[64] */
-	auto audio_2fs = audio_dec_2.execute(audio_4fs, work_audio_buffer);
+		/* 192kHz int16_t[128]
+		 * -> 4th order CIC decimation by 2, gain of 1
+		 * -> 96kHz int16_t[64] */
+		auto audio_2fs = audio_dec_2.execute(audio_4fs, work_audio_buffer);
 
-	/* 96kHz int16_t[64]
-	 * -> FIR filter, <15kHz (0.156fs) pass, >19kHz (0.198fs) stop, gain of 1
-	 * -> 48kHz int16_t[32] */
-	auto audio = audio_filter.execute(audio_2fs, work_audio_buffer);
+		/* 96kHz int16_t[64]
+		 * -> FIR filter, <15kHz (0.156fs) pass, >19kHz (0.198fs) stop, gain of 1
+		 * -> 48kHz int16_t[32] */
+		auto audio = audio_filter.execute(audio_2fs, work_audio_buffer);
+	
+		/* -> 48kHz int16_t[32] */
+		audio_output.write(audio);
+	} else {
+		for (c = 0; c < 32; c++) {
+			if (synth_acc < pwmrssi_avg)
+				pwmrssi_audio_buffer.p[c] = 32767;
+			else
+				pwmrssi_audio_buffer.p[c] = -32768;
+			if (synth_acc < 96)		// 48kHz / 96 = 500Hz (TODO: use pwmrssi_freq !)
+				synth_acc++;
+			else
+				synth_acc = 0;
+		}
 
-	/* -> 48kHz int16_t[32] */
-	audio_output.write(audio);
+		/* -> 48kHz int16_t[32] */
+		audio_output.write(pwmrssi_audio_buffer);
+	}
+	
 }
 
 void WidebandFMAudio::on_message(const Message* const message) {
@@ -86,6 +103,10 @@ void WidebandFMAudio::on_message(const Message* const message) {
 	case Message::ID::CaptureConfig:
 		capture_config(*reinterpret_cast<const CaptureConfigMessage*>(message));
 		break;
+	
+	case Message::ID::PWMRSSIConfigure:
+		pwmrssi_config(*reinterpret_cast<const PWMRSSIConfigureMessage*>(message));
+		break;
 		
 	default:
 		break;
@@ -114,9 +135,18 @@ void WidebandFMAudio::configure(const WFMConfigureMessage& message) {
 
 	channel_spectrum.set_decimation_factor(1);
 
+	pwmrssi_enabled = false;
+	synth_acc = 0;
+
 	configured = true;
 }
 
+void WidebandFMAudio::pwmrssi_config(const PWMRSSIConfigureMessage& message) {
+	pwmrssi_enabled = message.enabled;
+	pwmrssi_freq = message.freq;
+	pwmrssi_avg = message.avg;
+}
+
 void WidebandFMAudio::capture_config(const CaptureConfigMessage& message) {
 	if( message.config ) {
 		audio_output.set_stream(std::make_unique<StreamInput>(message.config));
diff --git a/firmware/baseband/proc_wfm_audio.hpp b/firmware/baseband/proc_wfm_audio.hpp
index 6b0c5e17..c2726e8f 100644
--- a/firmware/baseband/proc_wfm_audio.hpp
+++ b/firmware/baseband/proc_wfm_audio.hpp
@@ -54,6 +54,12 @@ private:
 		(int16_t*)dst.data(),
 		sizeof(dst) / sizeof(int16_t)
 	};
+	
+	std::array<int16_t, 32> pwm;
+	const buffer_s16_t pwmrssi_audio_buffer {
+		(int16_t*)pwm.data(),
+		sizeof(pwm) / sizeof(int16_t)
+	};
 
 	dsp::decimate::FIRC8xR16x24FS4Decim4 decim_0;
 	dsp::decimate::FIRC16xR16x16Decim2 decim_1;
@@ -70,8 +76,14 @@ private:
 	SpectrumCollector channel_spectrum;
 	size_t spectrum_interval_samples = 0;
 	size_t spectrum_samples = 0;
+	
+	unsigned int c, synth_acc = 0;
+	bool pwmrssi_enabled = false;
+	uint32_t pwmrssi_freq;
+	uint32_t pwmrssi_avg;
 
 	bool configured { false };
+	void pwmrssi_config(const PWMRSSIConfigureMessage& message);
 	void configure(const WFMConfigureMessage& message);
 	void capture_config(const CaptureConfigMessage& message);
 };
diff --git a/firmware/baseband/proc_xylos.cpp b/firmware/baseband/proc_xylos.cpp
index 973441e4..0b64c186 100644
--- a/firmware/baseband/proc_xylos.cpp
+++ b/firmware/baseband/proc_xylos.cpp
@@ -21,10 +21,6 @@
  */
 
 #include "proc_xylos.hpp"
-
-#include "dsp_iir_config.hpp"
-#include "audio_output.hpp"
-
 #include "portapack_shared_memory.hpp"
 #include "sine_table_int8.hpp"
 #include "event_m4.hpp"
diff --git a/firmware/common/message.hpp b/firmware/common/message.hpp
index df1d1c9a..a07b1c42 100644
--- a/firmware/common/message.hpp
+++ b/firmware/common/message.hpp
@@ -69,7 +69,7 @@ public:
 		Retune = 21,
 		XylosConfigure = 22,
 		AFSKConfigure = 23,
-		ModuleID = 24,
+		PWMRSSIConfigure = 24,
 		FIFOSignal = 25,
 		FIFOData = 26,
 		MAX
@@ -479,15 +479,24 @@ public:
 	int n = 0;
 };
 
-class ModuleIDMessage : public Message {
+
+
+class PWMRSSIConfigureMessage : public Message {
 public:
-	ModuleIDMessage(
-	) : Message { ID::ModuleID }
+	PWMRSSIConfigureMessage(
+		const bool enabled,
+		const uint32_t freq,
+		const int32_t avg
+	) : Message { ID::PWMRSSIConfigure },
+		enabled(enabled),
+		freq(freq),
+		avg(avg)
 	{
 	}
 	
-	bool query;
-	char md5_signature[16];
+	const bool enabled;
+	const uint32_t freq;
+	const int32_t avg;
 };
 
 class XylosConfigureMessage : public Message {
diff --git a/firmware/common/ui_widget.cpp b/firmware/common/ui_widget.cpp
index 71247cc7..021a9f7f 100644
--- a/firmware/common/ui_widget.cpp
+++ b/firmware/common/ui_widget.cpp
@@ -369,13 +369,13 @@ void BigFrequency::paint(Painter& painter) {
 		digit_y = rect.pos.y;
 		if (digit < 16) {
 			digit_def = big_segment_font[(uint8_t)digit];
-			if (digit_def & 0x01) painter.fill_rectangle({{digit_x + 4, digit_y}, 		{20, 4}}, 	segment_color);
-			if (digit_def & 0x02) painter.fill_rectangle({{digit_x + 24, digit_y + 4}, 	{4, 20}}, 	segment_color);
-			if (digit_def & 0x04) painter.fill_rectangle({{digit_x + 24, digit_y + 28}, {4, 20}}, 	segment_color);
-			if (digit_def & 0x08) painter.fill_rectangle({{digit_x + 4, digit_y + 48}, 	{20, 4}}, 	segment_color);
-			if (digit_def & 0x10) painter.fill_rectangle({{digit_x, digit_y + 28}, 		{4, 20}}, 	segment_color);
-			if (digit_def & 0x20) painter.fill_rectangle({{digit_x, digit_y + 4}, 		{4, 20}}, 	segment_color);
-			if (digit_def & 0x40) painter.fill_rectangle({{digit_x + 4, digit_y + 24}, 	{20, 4}}, 	segment_color);
+			if (digit_def & 0x01) painter.fill_rectangle({{digit_x + 4, 	digit_y}, 		{20, 4}}, 	segment_color);
+			if (digit_def & 0x02) painter.fill_rectangle({{digit_x + 24, 	digit_y + 4}, 	{4, 20}}, 	segment_color);
+			if (digit_def & 0x04) painter.fill_rectangle({{digit_x + 24, 	digit_y + 28}, 	{4, 20}}, 	segment_color);
+			if (digit_def & 0x08) painter.fill_rectangle({{digit_x + 4, 	digit_y + 48}, 	{20, 4}}, 	segment_color);
+			if (digit_def & 0x10) painter.fill_rectangle({{digit_x, 		digit_y + 28}, 	{4, 20}}, 	segment_color);
+			if (digit_def & 0x20) painter.fill_rectangle({{digit_x, 		digit_y + 4}, 	{4, 20}}, 	segment_color);
+			if (digit_def & 0x40) painter.fill_rectangle({{digit_x + 4, 	digit_y + 24}, 	{20, 4}}, 	segment_color);
 		}
 		if (i == 3) {
 			// Dot
@@ -665,6 +665,15 @@ void Image::set_background(const Color color) {
 	set_dirty();
 }
 
+void Image::invert_colors() {
+	Color temp;
+	
+	temp = background_;
+	background_ = foreground_;
+	foreground_ = temp;
+	set_dirty();
+}
+
 void Image::paint(Painter& painter) {
 	if( bitmap_ ) {
 		// Code also handles ImageButton behavior.
diff --git a/firmware/common/ui_widget.hpp b/firmware/common/ui_widget.hpp
index 6bb59d6c..4af3b352 100644
--- a/firmware/common/ui_widget.hpp
+++ b/firmware/common/ui_widget.hpp
@@ -289,6 +289,7 @@ public:
 	void set_bitmap(const Bitmap* bitmap);
 	void set_foreground(const Color color);
 	void set_background(const Color color);
+	void invert_colors();
 
 	void paint(Painter& painter) override;
 
diff --git a/firmware/portapack-h1-firmware.bin b/firmware/portapack-h1-firmware.bin
index 21644d68..59dd8e63 100644
Binary files a/firmware/portapack-h1-firmware.bin and b/firmware/portapack-h1-firmware.bin differ