diff --git a/res/layouts/pages/settings_audio.xml.lua b/res/layouts/pages/settings_audio.xml.lua
index 9b29bd52..1b14cf04 100644
--- a/res/layouts/pages/settings_audio.xml.lua
+++ b/res/layouts/pages/settings_audio.xml.lua
@@ -24,10 +24,44 @@ function update_setting(x, id, name, postfix)
     )
 end
 
+local initialized = false
+
 function on_open()
+    if not initialized then
+        initialized = true
+        local token = audio.input.__get_core_token()
+        document.root:add("<container id='tm' />")
+        local prev_amplitude = 0.0
+        document.tm:setInterval(16, function()
+            audio.input.fetch_input(token)
+            local amplitude = audio.input.get_max_amplitude()
+            if amplitude > 0.0 then
+                amplitude = math.sqrt(amplitude)
+            end
+            document.input_volume_inner.size = {
+                prev_amplitude *
+                document.input_volume_outer.size[1],
+                document.input_volume_outer.size[2]
+            }
+            prev_amplitude = amplitude * 0.25 + prev_amplitude * 0.75
+        end)
+    end
     create_setting("audio.volume-master", "Master Volume", 0.01)
     create_setting("audio.volume-regular", "Regular Sounds", 0.01)
     create_setting("audio.volume-ui", "UI Sounds", 0.01)
     create_setting("audio.volume-ambient", "Ambient", 0.01)
     create_setting("audio.volume-music", "Music", 0.01)
+    document.root:add("<select id='input_device_select' "..
+        "onselect='function(opt) audio.set_input_device(opt) end'/>")
+    document.root:add("<container id='input_volume_outer' color='#000000' size='4'>"
+                        .."<container id='input_volume_inner' color='#00FF00FF' size='4'/>"
+                    .."</container>")
+    local selectbox = document.input_device_select
+    local devices = {}
+    local names = audio.get_input_devices_names()
+    for i, name in ipairs(names) do
+        table.insert(devices, {value=name, text=name})
+    end
+    selectbox.options = devices
+    selectbox.value = audio.get_input_info().device_specifier
 end
diff --git a/res/layouts/templates/problem.xml b/res/layouts/templates/problem.xml
index f4382dbb..b2bfdfe9 100644
--- a/res/layouts/templates/problem.xml
+++ b/res/layouts/templates/problem.xml
@@ -1,7 +1,7 @@
 <container id="%{id}" size="32" tooltip="%{text}" 
            onclick="events.emit('core:open_traceback', '%{traceback}')">
     <image src="gui/%{type}" size="32"/>
-    <label pos="36,2" sizefunc="-1,-1">%{text}</label>
+    <label pos="36,2" size-func="-1,-1">%{text}</label>
     <image src="gui/cross" interactive="true" size="16" gravity="top-right" 
            onclick="document['%{id}']:destruct()"></image>
 </container>
diff --git a/res/layouts/templates/script_file.xml b/res/layouts/templates/script_file.xml
index f5d55729..69a63342 100644
--- a/res/layouts/templates/script_file.xml
+++ b/res/layouts/templates/script_file.xml
@@ -6,7 +6,7 @@
         onclick='%{open_func}("%{filename}")'
         markup='md'
         tooltip='%{unit}'
-        sizefunc="-1,-1">
+        size-func="-1,-1">
         [#FFFFFF80]%{path}[#FFFFFFFF]%{name}
     </label>
 </container>
diff --git a/res/modules/internal/audio_input.lua b/res/modules/internal/audio_input.lua
index b87c7071..f61d5300 100644
--- a/res/modules/internal/audio_input.lua
+++ b/res/modules/internal/audio_input.lua
@@ -1,27 +1,43 @@
-local audio_input_tokens_store = {}
+local _base64_encode_urlsafe = base64.encode_urlsafe
+local _random_bytes = random.bytes
+local core_token = _base64_encode_urlsafe(_random_bytes(18))
+
+local audio_input_tokens_store = {[core_token] = "core"}
 audio.input = {}
 
 local _gui_confirm = gui.confirm
-local _base64_encode_urlsafe = base64.encode_urlsafe
-local _random_bytes = random.bytes
 local _debug_pack_by_frame = debug.get_pack_by_frame
 local _audio_fetch_input = audio.__fetch_input
 audio.__fetch_input = nil
 local MAX_FETCH = 44100 * 4
+local MAX_AMPLITUDE = 32768
 
 local total_fetch = Bytearray()
+local max_amplitude = 0.0
 
 function audio.__reset_fetch_buffer()
     total_fetch:clear()
+    max_amplitude = 0.0
 end
 
-function audio.fetch_input(token, size)
+function audio.input.get_max_amplitude()
+    return max_amplitude / MAX_AMPLITUDE
+end
+
+function audio.input.fetch_input(token, size)
     size = size or MAX_FETCH
     if audio_input_tokens_store[token] then
         if #total_fetch >= size then
             return total_fetch:slice(1, size)
         end
-        total_fetch:append(_audio_fetch_input(size - #total_fetch))
+        local fetched = _audio_fetch_input(size - #total_fetch)
+        if not fetched then
+            return
+        end
+        for i, sample in ipairs(I16view(fetched)) do
+            max_amplitude = math.max(math.abs(sample))
+        end
+        total_fetch:append(fetched)
         return total_fetch:slice()
     end
     error("access denied")
@@ -38,3 +54,10 @@ function audio.input.request_open(callback)
         menu:reset()
     end)
 end
+
+function audio.input.__get_core_token()
+    local caller = _debug_pack_by_frame(1)
+    if caller == "core" then
+        return core_token
+    end
+end
diff --git a/res/scripts/hud.lua b/res/scripts/hud.lua
index 3e2fecb1..0124c93d 100644
--- a/res/scripts/hud.lua
+++ b/res/scripts/hud.lua
@@ -119,6 +119,8 @@ function on_hud_open()
 
     hud.default_hand_controller = update_hand
 
+    debug.print(audio.get_input_devices_names())
+
     stream = audio.PCMStream(44100, 1, 16)
     stream:share("test-stream")
     streamid = audio.play_stream_2d("test-stream", 2.0, 1.0, "ui")
@@ -147,7 +149,9 @@ function on_hud_render()
     end
 
     if input_access_token then
-        local bytes = audio.fetch_input(input_access_token)
-        stream:feed(bytes)
+        local bytes = audio.input.fetch_input(input_access_token)
+        if bytes then
+            stream:feed(bytes)
+        end
     end
 end
diff --git a/src/audio/AL/ALAudio.cpp b/src/audio/AL/ALAudio.cpp
index 83d5c4f4..e38c0f16 100644
--- a/src/audio/AL/ALAudio.cpp
+++ b/src/audio/AL/ALAudio.cpp
@@ -79,6 +79,13 @@ ALInputDevice::ALInputDevice(
       channels(channels),
       bitsPerSample(bitsPerSample),
       sampleRate(sampleRate) {
+    const ALCchar* deviceName = alcGetString(device, ALC_CAPTURE_DEVICE_SPECIFIER);
+
+    if (deviceName) {
+        deviceSpecifier = std::string(deviceName);
+    } else {
+        logger.warning() << "could not retrieve input device specifier";
+    }
 }
 
 ALInputDevice::~ALInputDevice() {
@@ -108,6 +115,10 @@ uint ALInputDevice::getBitsPerSample() const {
     return bitsPerSample;
 }
 
+const std::string& ALInputDevice::getDeviceSpecifier() const {
+    return deviceSpecifier;
+}
+
 size_t ALInputDevice::read(char* buffer, size_t bufferSize) {
     ALCint samplesCount = 0;
     alcGetIntegerv(device, ALC_CAPTURE_SAMPLES, sizeof(samplesCount), &samplesCount);
diff --git a/src/audio/AL/ALAudio.hpp b/src/audio/AL/ALAudio.hpp
index 39e6f337..f154741f 100644
--- a/src/audio/AL/ALAudio.hpp
+++ b/src/audio/AL/ALAudio.hpp
@@ -104,6 +104,7 @@ namespace audio {
         uint getChannels() const override;
         uint getSampleRate() const override;
         uint getBitsPerSample() const override;
+        const std::string& getDeviceSpecifier() const override;
 
         size_t read(char* buffer, size_t bufferSize) override;
     private:
@@ -112,6 +113,7 @@ namespace audio {
         uint channels;
         uint bitsPerSample;
         uint sampleRate;
+        std::string deviceSpecifier;
     };
 
     /// @brief AL source adapter
diff --git a/src/audio/audio.hpp b/src/audio/audio.hpp
index 551fd7ec..2cd8c127 100644
--- a/src/audio/audio.hpp
+++ b/src/audio/audio.hpp
@@ -127,7 +127,12 @@ namespace audio {
         /// @return 8 or 16
         virtual uint getBitsPerSample() const = 0;
 
+        /// @brief Read available data to buffer.
+        /// @return size of data received or PCMStream::ERROR in case of error
         virtual size_t read(char* buffer, size_t bufferSize) = 0;
+
+        /// @brief Get device specifier string
+        virtual const std::string& getDeviceSpecifier() const = 0;
     };
 
     /// @brief audio::PCMStream is a data source for audio::Stream
diff --git a/src/logic/scripting/lua/libs/libaudio.cpp b/src/logic/scripting/lua/libs/libaudio.cpp
index 37c26549..a848f7d0 100644
--- a/src/logic/scripting/lua/libs/libaudio.cpp
+++ b/src/logic/scripting/lua/libs/libaudio.cpp
@@ -441,7 +441,9 @@ static int l_audio_get_input_info(lua::State* L) {
     if (device == nullptr) {
         return 0;
     }
-    lua::createtable(L, 0, 3);
+    lua::createtable(L, 0, 4);
+    lua::pushlstring(L, device->getDeviceSpecifier());
+    lua::setfield(L, "device_specifier");
     lua::pushinteger(L, device->getChannels());
     lua::setfield(L, "channels");
     lua::pushinteger(L, device->getSampleRate());