Display and Navigation

The WDD-LITE is an AMOLED touchscreen. Everything is done by touch: there is no rotary encoder and no buttons. It supports four display orientations (two landscape and two portrait), selectable in Settings, with landscape as the default. This article covers how to move around the screen and what each view shows.

Input Methods

Gesture	What It Does
Tap	Selects an item: a mode tab, a settings row, a button, or a confirm/cancel choice
Swipe left / right	On the main screen, switches between display modes (Volts, Volume, Temp, and so on). On most settings screens, swiping right goes back. On the Select Source list, swiping right searches again
Swipe up / down	On a menu or settings screen, scrolls the list (with momentum); tap a row to select it. A few number rows have no slider: tap one, then swipe up / down to change its value
Swipe up from the lower half of the main screen	Opens the volume arc, so you can set the volume by dragging
Long press	Opens the main menu from the main screen. Holding a playback button does not open the menu

On the main screen you can also tap the gear icon in the top-right corner to open the menu, as an alternative to long-pressing.

Main Screen Layout

The main screen has these parts:

• Top bar (across the top): the LF Audio logo, compact readouts for voltage, temperature, and volume, system status icons, and the settings gear.
• Content area (the middle): shows whichever mode you are currently viewing.
• Mode tab bar (across the bottom): a row of tabs, one per available mode. The active tab is highlighted.
• Playback bar (along the bottom edge): buttons for the music on your phone. It shows only when Playback is On and your phone is connected to your WVC base station. The tab bar then sits just above it. See Playback Controls.

Switching Between Modes

There are two ways to change what the content area shows:

• Tap a mode tab along the bottom of the screen.
• Swipe left or right anywhere in the content area. Swiping cycles through the available modes and wraps around at the ends.

Swiping works from anywhere in the content area, including places that hold their own controls or readings: the temperature readouts on the Temp view, the multi-channel readings shown when paired to a voltmeter or a temperature hub, and the channel-pair and view-style buttons on the FFT, Scope, and Waterfall views. A swipe that starts on one of those buttons, or drags across it, still changes the view; a tap on it still does what the button does.

Which mode tabs appear depends on what your connected base station supports. With a WVC base station, Volts and Volume are always available. Temp, FFT, Scope, and Waterfall appear only when the base station provides that data. See Overview for the full capability table.

A High Precision Voltmeter shows only Volts. A Temperature Hub shows only Temp. A Smart Signal Analyzer (SSA) shows FFT, Scope, and Waterfall. When there is only one view, the tab bar hides, and the view uses its space.

In portrait the tab bar is a single row that scrolls sideways when there are more tabs than fit across the narrower screen. Swipe the tab bar left or right to bring the others into view; the active tab is always scrolled into view for you when you change modes by swiping the main area. In landscape all the tabs fit across the bottom at once.

Playback Controls

A playback bar can show along the bottom of the screen. It shows when your phone is connected to your WVC base station over Bluetooth. Its buttons control what is playing on the phone: previous, play/pause and next. On an Android phone there can also be a Song list button. See Song list.

This works with the phone locked and the LF Audio app closed. You can skip a track without picking up the phone.

The bar shows only when Playback is On. To turn it on, open the menu, choose Settings, and set Playback to On. See Menus and Settings.

When the bar shows, the tab bar sits just above it. The view gets shorter to make room. When no phone is connected, the bar goes away, and the view gets its space back. The bar also hides in the camera view.

How the bar looks:

• Portrait: the song name and the artist sit on one line, above the buttons. For some music apps, the app's name shows at the right end. The song's time takes its place when the time shows.
• Landscape: the bar is one row. The song name sits on the left, over the artist. The buttons sit on the right.

When the Song list button is hidden, the other buttons sit in the middle.

While a song plays, an equalizer icon moves before the song name. When the song is paused, the icon goes away. In landscape, the icon does not show when the song's cover does. See Song covers.

In landscape, the bar hides on the Volume view when that view shows 8 groups. That gives the faders room. Switch to another view, and the bar comes back.

Song list

On an Android phone, the playback bar can also show the song that is playing, with the artist. The Song list button opens a list of songs from your music app. It can show up to 250 songs, with earlier songs too. Set it up in the LF Audio app first. See Song list.

• The song name shows while Song list is on in the app.
• The Song list button is the right-most button. It has a list icon.

To play a song from the list:

1. Tap the Song list button. The Song list opens.
2. The list opens on the song playing now. It has a play symbol. Earlier songs are above it, and look dimmer. The songs that come next are below it. If your music app does not say which song is playing, the list opens at the top.
3. Scroll to find a song.
4. Tap the song. Your music app plays it. The display goes back to the screen you came from.

To leave without picking a song, swipe right or tap Back at the bottom of the list.

You may also see:

• "..." in a row: that song is still loading. Wait a moment.
• "Couldn't load songs": go back. Then open the Song list again.
• "Turn on Song list in the LF Audio app": Song list is off in the app, or the app has no access to your music app. See Turn on Song list.

With some music apps, such as Spotify Free, the song name shows but the Song list button does not. Those apps do not share their songs. See Which music apps work.

Where you are in the song

The playback bar can also show how far into the song you are:

• A thin line along the top of the bar fills up as the song plays.
• The time shows too, for example 1:23 / 3:45. In portrait, it sits at the right end of the song name line. In landscape, it sits under the artist.

The line and the time show when your music app shares how long the song is.

If your music app allows it, hold previous or next to jump back or ahead 10 seconds. Keep holding to jump again. The song stays the same. If your music app does not allow it, a hold works just like a tap.

You need Song list on for the line, the time and the jumps. Song list needs an Android phone with the LF Audio app. The display, the base station and the app also need their latest versions.

Now Playing

Tap the song name in the playback bar to open Now Playing. It shows:

• The song name and the artist.
• The name of your music app at the right, just under the top bar, for some apps.
• A slider. Under it, the time so far shows on the left, and the length of the song on the right.
• Six buttons: back 10, play/pause, forward 10, previous, Song list and next. The back 10 and forward 10 buttons show a curved arrow around the number 10.
• The same top bar as the main screen, with your system voltage and temperature. See Voltage and temperature below.
• The song's cover, behind everything, with an Android phone. See Song covers.

In portrait, the buttons sit in two rows: back 10, play/pause and forward 10, over previous, Song list and next. In landscape, they sit in one row: previous, back 10, play/pause, forward 10, next and Song list.

If your music app allows it, you can move through the song here:

• Drag the slider to any part of the song. The time follows your finger. The song moves there when you let go.
• Tap back 10 or forward 10 to jump 10 seconds.

Only a drag moves the song. A tap on the slider does not. The slider is easy to grab. You do not have to hit it exactly. Start your drag anywhere from just under the artist down to the times.

After you move through the song, the slider and the time carry on from the new spot.

If your music app does not allow it, the slider, back 10 and forward 10 are dimmed. They do nothing. The slider and the times show only when your music app shares how long the song is. When a new song starts, the slider may wait at 0:00 for a moment, until the new song's time comes in.

Tap Song list to open the list. After you pick a song, the display comes back to Now Playing. The Song list button shows only when your music app shares its songs. When it is hidden, its place stays empty in portrait. In landscape, the other five buttons move to the middle.

To leave, swipe right or tap the arrow at the top left. Start the swipe on the song name or the buttons. Now Playing also closes by itself when the song name leaves the playback bar. That happens when your phone disconnects, Song list turns off, the display loses the base station, or your music app closes.

Now Playing Voltage and Temperature

Now Playing has the same top bar as the main screen. The LF Audio logo is at the left. On the right are the signal bars, the LR or HS label, the status icons and the gear. A battery-equipped unit shows its battery there too.

Your system voltage and temperature show on the right of that bar, next to the icons. When the right side is full, they move to the left, in place of the logo. You can watch them while the music plays.

• Voltage: your system voltage, to one decimal. It shows when your base station reports a voltage.
• Temperature: the first probe with a sensor plugged in. It uses your Temp Units setting, °F or °C. It shows only when a probe is connected.

At the left in portrait, only the voltage shows while the competition crosshairs or a warning icon shows. The temperature comes back a moment after the icon goes away. See Status Icons.

This needs WDD-LITE firmware 4.15.4 or newer.

Song covers

On an Android phone, the display can show the cover of the song that is playing.

• On the playback bar, the cover sits beside the song name. In portrait, the bar gets a little taller to fit it. A music note shows until the cover arrives. It also shows for a song with no cover.
• On Now Playing, the cover fills the screen behind the song. It is dimmed, so the words stay easy to read. It shows a moment after Now Playing opens.

The cover behind Now Playing needs High Speed mode. When High Speed is in use, the label beside the signal bars reads HS. See Link Mode. In Long Range mode, the cover still shows on the playback bar.

In portrait, the cover leaves the playback bar on the Volume view when that view shows 6 or more groups. The song name stays.

Covers need all of these:

• An Android phone with the latest LF Audio app, with Song list on. See Song list.
• WDD-LITE firmware 4.15.4 or newer.
• A WVC base station with firmware 4.22.0 or newer. Open Base Info. CPU1 FW and CPU2 FW must both be 4.22.0 or newer.
• Playback set to On in Settings.

Your music app must share the cover. If it does not, the music note stays.

The Modes

Volts

Volts is the default view out of the box. The WDD-LITE also remembers the last mode you were viewing and reopens it the next time it powers on (an analysis mode is restored once the base station's capabilities are known). Volts shows your system voltage as a large reading over a full-width scrolling trend graph, so you can see both the current value and how it has been moving.

Below the large reading is a smaller min / max readout (for example, min 12.3V max 14.5V). Whether these values track the all-time lowest and highest since power-on, or just the values currently visible in the graph, is controlled by the Min/Max setting. See Menus and Settings.

Volume

A console of vertical volume faders, one per channel group, showing your system's volume at a glance.

• Each fader's fill height shows the volume level that is actually playing for that group. While a change you have just made is still being confirmed by the base station, the fill shows the level you asked for, so a change is visible the moment you make it. If the base station never confirms it, the fill returns to the level that is really playing.
• The number above each fader shows that group's own set point. For a group that follows another group, this number is the value you set for it, even though what plays is adjusted by its parent.
• A group that is slaved to another (its volume follows a parent group) shows a dim band up to its set point and a small > parent name link beneath it, so you can see the relationship.
• At zero volume, a fader reads MUTE.
• With many groups, the faders sit in two rows.
• The display shows up to 8 groups. On a system with more, groups 9 and up are not shown. Changing one group does not change the settings of groups 9 and up. A group set to follow another group also moves with that group. Changing the master volume sets every group, 9 and up included, to the same level. A group that follows another group then plays at its share of that group's level.

Volume can be shown as a percentage or in decibels (dB), set by the Volume Units setting. If your system has only one volume group, a single MASTER fader is shown instead.

Adjusting Volume

Swipe up from the lower half of the main screen to open the volume arc. Drag around the arc to set the level; the number in the center shows the current level as a percentage. To close it, tap the X at the top. In landscape, the X sits in the top-right corner. The X needs WDD-LITE firmware 4.15.4 or newer. The arc also closes on its own after a few seconds without input, and closes immediately if you tap outside it or swipe down.

If your system has more than one channel group, the arc controls one group at a time. Tap a selector dot along the bottom of the arc to move the focus to another group, or tap a fader directly in the Volume console to open the arc already focused on that group. The first dot is the master volume, and the group's name is shown above the arc. Setting the master volume sets every group to that level. If a focused group follows a parent group, a > parent name line appears under the reading, the same relationship the Volume console shows.

On a single-group system the arc always controls master volume and no selector dots are shown.

Mute

To mute, swipe up to open the volume arc. Then tap the number in the middle. Every group goes to 0, and the number reads MUTE. The hint at the bottom of the arc includes "tap % to mute" as a reminder.

To bring the sound back, tap the number again. Your levels from before the mute come back. This works only while everything is still silent. If any volume was turned up after the mute, from the display, a knob or the app, a tap mutes again instead.

Temp (PRO / PRO 6 / Temperature Hub)

Amplifier temperature for each connected probe, shown as up to three readouts over a shared scrolling trend graph. Probes are labeled PROBE 1, PROBE 2, and PROBE 3.

Only probes that actually have a sensor plugged in are shown. If a probe jack is empty, its readout is hidden rather than showing a placeholder, and the trend line for that probe is skipped. If nothing is connected, a single -- is shown. The displayed unit follows your Temp Units setting (°F or °C).

This view appears when connected to a base station with temperature probes, or to a Temperature Hub. A WVC-PRO supports one probe; a WVC-PRO 6 supports three.

With a Temperature Hub, the view is one chart with a line for each connected channel, four at a time. Each line is labeled with the channel's name, or with IR or PROBE and its number. With more than four channels connected, tap the page number at the top, such as 1/2 >, to see the next four.

FFT (PRO / PRO 6 / SSA)

A real-time frequency spectrum analyzer. The left and right channels are shown side by side as a bar graph, with the live RCA input voltage for each channel labeled in the corners. This view is useful for seeing the frequency content of the signal reaching your amplifier.

Scope (PRO / PRO 6 / SSA)

A real-time oscilloscope, so you can see the actual shape of the audio signal. Quiet signals are scaled down so they do not fill the screen, giving you a sense of relative level.

The Scope view has a COMB | SPLIT selector in the top-left corner, in the same place the Waterfall view's 3D | SPEC selector appears:

• COMB (the default): both channels are drawn together over one shared centerline, so you can compare their shapes directly.
• SPLIT: the channels are stacked, each with its own centerline and its own half of the view, so neither trace can overlap the other. Each channel's name sits with its own trace.

Tap COMB or SPLIT to switch. Your choice is saved and restored across restarts.

Waterfall (PRO / PRO 6 / SSA)

A view of the audio spectrum over time, showing both channels side by side. Newer data sits in front and older data recedes, so you can watch how the spectrum has changed over the last few seconds. On a 6-channel WVC-PRO 6 you can pick which channel pair to view (see the channel pair selector below); on a 2-channel WVC-PRO it shows that system's single left/right pair.

The Waterfall view has a 3D | SPEC selector in the top-left corner that switches between two ways of drawing the same data:

• 3D: a mountain-range view where each channel's spectrum rises and falls over time, with newer frames in front.
• SPEC: a spectrogram (also called a spectrograph), a flat color-coded heatmap where each horizontal line is one moment's frequency content and brightness represents level. The newest line appears at the top and the image scrolls downward as new data arrives, so you can read sustained tones, sweeps, and rhythmic content at a glance.

Tap 3D or SPEC to switch. Your choice is saved and restored across restarts.

Channel Pair Selector (Multi-Channel Devices)

On a 6-channel WVC-PRO 6, the FFT, Scope, and Waterfall views show one channel pair at a time. A pill at the top of the view lets you tap to switch between CH 1-2, CH 3-4, and CH 5-6. On a 4-channel Smart Signal Analyzer, you can tap between CH 1-2 and CH 3-4. On 2-channel systems there is only one pair, so the selector does not appear.

The display remembers the pair you tap. After a restart, the views come back on that pair. This needs WDD-LITE firmware 4.14.8 or newer.

When Data Isn't Available

If the audio analysis data stops arriving, the FFT, Scope, and Waterfall views tell you why:

• Waiting for data... means the data has paused, or the link is still coming back after the screen wakes. You may see it for a moment when you first open the view. It fills in on its own.
• Reconnecting... means the display has no link to the base station. You may see it for a moment right after the display turns on, before the first data arrives. If the link drops, it shows for a moment, and then the display switches to its reconnect screen and keeps looking. See Automatic Reconnection.

On firmware older than 4.14.8, these views show NO DATA instead.

Status Icons

Icons in the top bar reflect your system's current state:

Icon	Meaning
Shield	The Intelligent Drive System (IDS) is armed
Crosshairs	Competition mode is active
Bolt (blinking)	IDS triggered on low voltage
Fire (blinking)	IDS triggered on high temperature
Bolt + Fire (blinking)	IDS triggered on both voltage and temperature

The warning icon (bolt / fire) blinks to draw attention and clears on its own once the underlying condition (low voltage or high temperature) goes away. For details on what IDS does, see the Intelligent Drive System (IDS) article.

Signal Strength

The top bar also shows a signal-strength meter for the wireless link to your base station. More filled bars mean a stronger connection, and the meter empties when the link drops. It gives you an at-a-glance read on connection health without opening System Info. For the exact dBm value and quality bands, see System Diagnostics.

Link Mode

Immediately to the right of the signal-strength meter is a small two-letter label showing which wireless mode the link is running in:

Label	Meaning
LR	Long Range mode. The link is running in the mode that reaches furthest.
HS	High Speed mode. The base station is sending data faster, so the FFT and Scope views refresh several times more often.
--	No mode to report yet. Either the display is not connected; or it has just connected or reconnected and has not sampled the link yet, so the label reads -- for a short window while System Info already says Connected; or it is paired to a High Precision Voltmeter, which does not use these modes.

The label sits next to the signal bars because the two answer different questions. The bars show how strong the link is; this shows what mode it is running in. A link can be strong and still be in Long Range mode, and that is not a fault.

You ask for High Speed with Settings > Enable High Speed, but the base station makes the final decision: it speeds the link up only when the display is close enough and its own firmware supports it. So the label is how you confirm what actually happened after changing that setting. See Menus and Settings.

Top-Bar Readouts

Alongside the icons, the top bar carries compact glances so the key numbers stay in view while you are looking at another mode:

• Voltage: the current system voltage, to one decimal.
• Temperature: the first connected temperature probe (hidden when no probe is connected), in your selected unit.
• Volume: the master volume, as a percentage or in dB depending on your Volume Units setting.

Each glance hides itself while its own view is the one on screen, since the large reading is already there. On the Volts view, for example, the top-bar voltage glance steps aside and the temperature and volume glances remain.

Auto Swap (Slideshow Mode)

When enabled, Auto Swap automatically cycles the main display through the available mode tabs every few seconds, the same sequence you would swipe through manually. You control whether it is on and how long each mode is shown (the Swap Time) from Settings. See Menus and Settings.

You can also choose which views Auto Swap shows. With Auto Swap on, Settings lists a Show / Hide row for each view your base station offers. A hidden view is skipped by Auto Swap. You can still tap its tab or swipe to it.

Connecting and Update Screens

While the WDD-LITE is searching for or reconnecting to a base station, it shows a status screen with a progress indicator and a message describing what it is doing. The menu remains reachable with a long-press throughout, so you can start a firmware update or change settings without waiting for the connection. You can also tap the gear icon in the top-right corner to open the menu. During a firmware update the menu does not open, and the gear is hidden.

During a firmware update (its own or the base station's), this same screen shows the live progress of the update. See Firmware Updates for the full workflow.

Navigating Menus and Settings Screens

Most menu and settings screens share a consistent layout:

• A title stays fixed at the top. Tap it to go back. The Select Source device list is the one exception: tapping its title does nothing. Tap a device, or swipe right to search again.
• A scrollable list of items sits below the title. Swipe up or down (or flick) to scroll the list with momentum, then tap a row to select it.
• A Back item at the bottom is another way to return. On most settings screens, swiping right also goes back. Select Source has no Back item. There, a swipe right searches again.
• Tap an item to activate it: this toggles a switch, opens a sub-screen, or cycles an option.

Pair WVC and Pair Knob are different. Pair Knob uses only buttons. Pair WVC uses buttons too, but it shows the Select Source list when you pick the new base station. On both, a swipe right does not always just go back. See Pair WVC and Pair Knob.

To change a slider, drag it left or right. Two number rows in Base Settings have no slider: Voltage Drift and Max Temp. Tap one to start editing. Then swipe up to raise the value, or down to lower it. The list stops scrolling while you edit. Tap the row again when you are done. Floor Level has a slider and four buttons. Drag the slider, or tap -5 or +5 to move 5 dB. Tap -0.5 or +0.5 to move 0.5 dB. See Menus and Settings for the full menu structure and every setting.

Display Brightness

Adjust screen brightness from 10-100% in Settings > Brightness. Lower brightness saves power and reduces glare in dark environments; the change applies immediately as you adjust it.

Display Orientation

The WDD-LITE can run in four display orientations, so you can mount it whichever way suits your dash: Landscape (the default), Landscape Flipped, Portrait, or Portrait Flipped. Set it in Settings > Orientation: choose an orientation, then tap Rotate & Restart. That button ignores a tap right after it appears, so wait a moment before you tap it. The display restarts to apply it. The layout reflows to fit each orientation. The top bar keeps its compact readouts in every orientation; in portrait they are simply packed tighter to fit the narrower screen. See Menus and Settings for the full settings reference.