diff --git a/firmware/application/baseband_api.cpp b/firmware/application/baseband_api.cpp
index 62dfbcc1b..e30e1392a 100644
--- a/firmware/application/baseband_api.cpp
+++ b/firmware/application/baseband_api.cpp
@@ -99,8 +99,9 @@ void set_afsk_data(const uint32_t afsk_samples_per_bit, const uint32_t afsk_phas
 	send_message(&message);
 }
 
-void set_audiotx_data(const uint32_t bw) {
+void set_audiotx_data(const uint32_t divider, const uint32_t bw) {
 	const AudioTXConfigMessage message {
+		divider,
 		bw
 	};
 	send_message(&message);
diff --git a/firmware/application/baseband_api.hpp b/firmware/application/baseband_api.hpp
index 01fea3952..c4d959c72 100644
--- a/firmware/application/baseband_api.hpp
+++ b/firmware/application/baseband_api.hpp
@@ -53,7 +53,7 @@ struct WFMConfig {
 };
 
 void set_ccir_data(	const uint32_t samples_per_tone, const uint16_t tone_count);
-void set_audiotx_data(const uint32_t bw);
+void set_audiotx_data(const uint32_t divider, const uint32_t bw);
 void set_fifo_data(const int8_t * data);
 void set_pwmrssi(int32_t avg, bool enabled);
 void set_afsk_data(const uint32_t afsk_samples_per_bit, const uint32_t afsk_phase_inc_mark, const uint32_t afsk_phase_inc_space,
diff --git a/firmware/application/file.cpp b/firmware/application/file.cpp
index a0ebd7f3c..ffcfd1826 100644
--- a/firmware/application/file.cpp
+++ b/firmware/application/file.cpp
@@ -138,7 +138,7 @@ static std::string find_last_file_matching_pattern(const std::string& pattern) {
 	return last_match;
 }
 
-static std::string remove_filename_extension(const std::string& filename) {
+std::string remove_filename_extension(const std::string& filename) {
 	const auto extension_index = filename.find_last_of('.');
 	return filename.substr(0, extension_index);
 }
@@ -178,14 +178,14 @@ std::string next_filename_stem_matching_pattern(const std::string& filename_stem
 	return filename_stem;
 }
 
-std::vector<std::string> scan_root_files(const std::string& extension) {
+std::vector<std::string> scan_root_files(const std::string& directory, const std::string& extension) {
 	std::vector<std::string> file_list { };
 	std::string fname;
 	FRESULT res;
 	DIR dir;
 	static FILINFO fno;
 
-	res = f_opendir(&dir, "/");
+	res = f_opendir(&dir, directory.c_str());
 	if (res == FR_OK) {
 		for (;;) {
 			res = f_readdir(&dir, &fno);
diff --git a/firmware/application/file.hpp b/firmware/application/file.hpp
index 05c7f74b2..91d1acc93 100644
--- a/firmware/application/file.hpp
+++ b/firmware/application/file.hpp
@@ -35,8 +35,9 @@
 #include <iterator>
 #include <vector>
 
+std::string remove_filename_extension(const std::string& filename);
 std::string next_filename_stem_matching_pattern(const std::string& filename_stem_pattern);
-std::vector<std::string> scan_root_files(const std::string& extension);
+std::vector<std::string> scan_root_files(const std::string& directory, const std::string& extension);
 
 namespace std {
 namespace filesystem {
diff --git a/firmware/application/ui_about.cpp b/firmware/application/ui_about.cpp
index e520f2904..2be3ce2ce 100644
--- a/firmware/application/ui_about.cpp
+++ b/firmware/application/ui_about.cpp
@@ -59,7 +59,7 @@ void AboutView::on_show() {
 	transmitter_model.set_baseband_bandwidth(1750000);
 	transmitter_model.enable();
 	
-	baseband::set_audiotx_data(15);
+	baseband::set_audiotx_data(32, 15);
 	
 	//audio::headphone::set_volume(volume_t::decibel(0 - 99) + audio::headphone::volume_range().max);
 }
diff --git a/firmware/application/ui_about.hpp b/firmware/application/ui_about.hpp
index 2195c4ca3..91158275a 100644
--- a/firmware/application/ui_about.hpp
+++ b/firmware/application/ui_about.hpp
@@ -113,7 +113,7 @@ private:
 	
 	//								  0123456789A		 0123456789A
 	const credits_t credits[10] = { {"GURUS",			"J. BOONE", 		false},
-									{"GURYS",			"M. OSSMANN", 		true},
+									{"GURUS",			"M. OSSMANN", 		true},
 									{"BUGS",			"FURRTEK", 			true},
 									{"RDS WAVE",		"C. JACQUET", 		true},
 									{"POCSAG RX",		"T. SAILER",		false},
diff --git a/firmware/application/ui_soundboard.cpp b/firmware/application/ui_soundboard.cpp
index ed9e03b6e..705da133b 100644
--- a/firmware/application/ui_soundboard.cpp
+++ b/firmware/application/ui_soundboard.cpp
@@ -25,6 +25,7 @@
 #include "ui_soundboard.hpp"
 
 #include "ch.h"
+#include "file.hpp"
 
 #include "ui_alphanum.hpp"
 #include "ff.h"
@@ -108,7 +109,9 @@ void SoundBoardView::on_tuning_frequency_changed(rf::Frequency f) {
 
 void SoundBoardView::play_sound(uint16_t id) {
 
-	auto error = file.open(sounds[id].filename);
+	if (sounds[id].size == 0) return;
+
+	auto error = file.open("/wav/" + sounds[id].filename);
 	if (error.is_valid()) return;
 	
 	sample_duration = sounds[id].sample_duration;
@@ -132,7 +135,7 @@ void SoundBoardView::play_sound(uint16_t id) {
 	transmitter_model.set_baseband_bandwidth(1750000);
 	transmitter_model.enable();
 	
-	baseband::set_audiotx_data(number_bw.value());
+	baseband::set_audiotx_data(1536000 / sounds[id].sample_rate, number_bw.value());
 }
 
 void SoundBoardView::show_infos(uint16_t id) {
@@ -174,7 +177,6 @@ void SoundBoardView::change_page(Button& button, const KeyEvent key) {
 			refresh_buttons(button.id);
 		}
 	}
-	
 	if (button.screen_pos().x > 120) {
 		if ((key == KeyEvent::Right) && (page < max_page - 1)) {
 			page++;
@@ -204,12 +206,12 @@ SoundBoardView::SoundBoardView(
 	
 	baseband::run_image(portapack::spi_flash::image_tag_audio_tx);
 
-	file_list = scan_root_files(".WAV");
+	file_list = scan_root_files("/wav", ".WAV");
 
 	c = 0;
 	for (auto& file_name : file_list) {
 		
-		auto error = file.open(file_name);
+		auto error = file.open("/wav/" + file_name);
 		
 		file.seek(40);
 		file.read(file_buffer, 4);
@@ -240,7 +242,7 @@ SoundBoardView::SoundBoardView(
 		sounds[c].sample_duration = size;
 		
 		sounds[c].filename = file_name;
-		sounds[c].shortname = file_name.substr(0, file_name.find_last_of("."));
+		sounds[c].shortname = remove_filename_extension(file_name);
 		
 		c++;
 		if (c == 100) break;
@@ -271,8 +273,6 @@ SoundBoardView::SoundBoardView(
 	};
 	
 	const auto button_dir = [this](Button& button, const KeyEvent key) {
-		(void)button;
-		
 		this->change_page(button, key);
 	};
 
diff --git a/firmware/application/ui_soundboard.hpp b/firmware/application/ui_soundboard.hpp
index 324166d41..bb8054042 100644
--- a/firmware/application/ui_soundboard.hpp
+++ b/firmware/application/ui_soundboard.hpp
@@ -52,14 +52,14 @@ private:
 	tx_modes tx_mode = NORMAL;
 	
 	struct sound {
-		std::string filename;
-		std::string shortname;
-		bool stereo;
-		bool sixteenbit;
-		uint32_t sample_rate;
-		uint32_t size;
-		uint32_t sample_duration;
-		uint32_t ms_duration;
+		std::string filename = "";
+		std::string shortname = "";
+		bool stereo = false;
+		bool sixteenbit = false;
+		uint32_t sample_rate = 0;
+		uint32_t size = 0;
+		uint32_t sample_duration = 0;
+		uint32_t ms_duration = 0;
 	};
 	
 	uint32_t cnt;
diff --git a/firmware/baseband/proc_audiotx.cpp b/firmware/baseband/proc_audiotx.cpp
index 22b5adb8e..05ef3e1c5 100644
--- a/firmware/baseband/proc_audiotx.cpp
+++ b/firmware/baseband/proc_audiotx.cpp
@@ -34,12 +34,12 @@ void AudioTXProcessor::execute(const buffer_c8_t& buffer){
 	
 	if (!configured) return;
 
-	ai = 0;
+	//ai = 0;
 	for (size_t i = 0; i<buffer.count; i++) {
 		
-		// Audio preview sample generation: 1536000/48000 = 32
+		// Audio preview sample generation: 1536000/divider = samplerate
 		if (!as) {
-			as = 32;
+			as = divider;
 			audio_fifo.out(sample);
 			//preview_audio_buffer.p[ai++] = sample << 8;
 			
@@ -78,6 +78,7 @@ void AudioTXProcessor::on_message(const Message* const msg) {
 			// m = (262144 * a) / 1536000
 			// a = 262144 / 1536000 (*1000 = 171)
 			bw = 171 * (message->bw);
+			divider = message->divider;
 			as = 0;
 
 			configured = true;
diff --git a/firmware/baseband/proc_audiotx.hpp b/firmware/baseband/proc_audiotx.hpp
index 2cad1548e..fc23f0bd5 100644
--- a/firmware/baseband/proc_audiotx.hpp
+++ b/firmware/baseband/proc_audiotx.hpp
@@ -42,7 +42,9 @@ private:
 	FIFO<int8_t> audio_fifo = { audio_fifo_data, 11 };	// 43ms @ 48000Hz
 	
 	uint32_t bw;
-	uint8_t as = 0, ai;
+	uint32_t divider;
+	uint8_t as = 0;
+	
 	int8_t re, im;
 	int8_t sample;
 	
diff --git a/firmware/common/message.hpp b/firmware/common/message.hpp
index 71a6f31e6..0f0c438a5 100644
--- a/firmware/common/message.hpp
+++ b/firmware/common/message.hpp
@@ -561,12 +561,15 @@ public:
 class AudioTXConfigMessage : public Message {
 public:
 	constexpr AudioTXConfigMessage(
+		const uint32_t divider,
 		const uint32_t bw
 	) : Message { ID::AudioTXConfig },
+		divider(divider),
 		bw(bw)
 	{
 	}
 
+	const uint32_t divider;
 	const uint32_t bw;
 };
 
diff --git a/firmware/portapack-h1-havoc.bin b/firmware/portapack-h1-havoc.bin
index 1758558ba..811bd6114 100644
Binary files a/firmware/portapack-h1-havoc.bin and b/firmware/portapack-h1-havoc.bin differ
diff --git a/pictures/about.png b/pictures/about.png
new file mode 100644
index 000000000..92ba75646
Binary files /dev/null and b/pictures/about.png differ
diff --git a/pictures/afsk.png b/pictures/afsk.png
new file mode 100644
index 000000000..5c2e08d29
Binary files /dev/null and b/pictures/afsk.png differ
diff --git a/pictures/config.png b/pictures/config.png
new file mode 100644
index 000000000..33bbb84a9
Binary files /dev/null and b/pictures/config.png differ
diff --git a/pictures/lcr.png b/pictures/lcr.png
new file mode 100644
index 000000000..8f7d12bc5
Binary files /dev/null and b/pictures/lcr.png differ
diff --git a/pictures/ook_enc.png b/pictures/ook_enc.png
new file mode 100644
index 000000000..dbb8670c0
Binary files /dev/null and b/pictures/ook_enc.png differ
diff --git a/pictures/pocsag.png b/pictures/pocsag.png
new file mode 100644
index 000000000..17e5c6ec0
Binary files /dev/null and b/pictures/pocsag.png differ
diff --git a/pictures/rds.png b/pictures/rds.png
new file mode 100644
index 000000000..9e692b6f1
Binary files /dev/null and b/pictures/rds.png differ
diff --git a/pictures/soundboard.png b/pictures/soundboard.png
new file mode 100644
index 000000000..fcffbf44f
Binary files /dev/null and b/pictures/soundboard.png differ
diff --git a/pictures/xylos.png b/pictures/xylos.png
new file mode 100644
index 000000000..f83a88082
Binary files /dev/null and b/pictures/xylos.png differ