iTechGuides is reader-supported. When you buy through links on our site, we may earn an affiliate commission. As an Amazon Associate I earn from qualifying purchases. Learn more
Fix a DIY arcade topper by isolating one link in the chain at a time: controller, emulator, display processing, video geometry, or audio routing. Start with the monitor’s low-latency mode and native display settings, compare a wired controller with the current controller, confirm the game’s region and refresh rate, and select the output that actually feeds your speakers. Do not begin by forcing a resolution or copying a config.txt tweak from another Raspberry Pi generation.
This guide is written for Raspberry Pi and RetroPie-style builds. Exact menus and available outputs vary with the Pi board, operating system, monitor, emulator, cabinet encoder, amplifier, and speaker wiring, so use the platform-specific instructions only where they match your hardware.
Identify the fault before changing settings
Input lag, a badly scaled picture, and silent speakers can appear together after a topper is assembled, but they usually have different causes. Treat the topper as a chain:
- The button or joystick and its encoder register an input.
- The operating system and emulator process that input.
- The Raspberry Pi produces a video mode and audio stream.
- The monitor may process, scale, or crop the picture.
- The audio signal reaches a speaker, amplifier, or powered display.
Change one variable, test, and record the result. A recovery path matters because an unsupported latency or video setting can leave a display blank or make the system too slow to use.
#1 Best Overall
- Read Before You Buy — No Video Output: These adapters support charging and USB 2.0 data transfer, but cannot transmit video signals. Except for standard USB webcams (which use USB data only), they are not compatible with HDMI/DisplayPort cables, video-capable USB-C hubs, or docking stations with video output.
- Convert USB-A Ports to USB-C: Designed to connect USB-C earphones, cables, flash drives, card readers, and other USB-C accessories to standard USB-A ports. Plug-and-play with no drivers or software required.
- Aluminum Alloy Housing: Built with a sturdy aluminum alloy shell that aids in heat dissipation and protects against daily wear and scratches. Designed to maintain a stable and secure connection.
- Compact & Travel-Friendly: The ultra-compact design allows the adapter to stay plugged into your device without blocking adjacent ports or adding bulk, reducing wear and tear on your original USB ports.
- 12-Month Warranty: Backed by a 12-month manufacturer warranty for peace of mind. Designed to meet strict quality control standards for reliable everyday performance.
Record the build
Before troubleshooting, write down:
- Pi model and generation.
- Operating system and RetroPie or other front-end version.
- Monitor model, native resolution, aspect ratio, and supported refresh rates.
- Whether the display is connected to HDMI, a converter board, or another interface.
- Controller type, wireless receiver, USB encoder, and the ports in use.
- Speaker wiring: monitor speakers, HDMI audio, USB audio, analog output where available, or a separate amplifier.
- The emulator and game in which each problem appears.
These details determine which outputs and controls exist. There is no universal arcade-topper resolution, audio port, or latency command.
Fix input lag methodically
RetroPie defines input lag as the delay between pressing a controller button and seeing the corresponding action on screen. The delay can be introduced by the controller connection, emulator processing, display processing, or a mismatch between the game’s timing and the display’s refresh rate. No measured lag value is established for a generic DIY topper, so avoid promises such as a particular number of milliseconds.
1. Establish a repeatable baseline
Use one game with a clear, immediate response, such as a platformer or rhythmically timed action. Test the same button several times with the same display mode. If only one emulator or game feels slow, the cabinet-wide hardware may be fine and the problem may be software-specific.
Quick wins for a faster PC:
Scan for outdated or missing drivers - takes under a minuteDriver Scan →Clear out junk files and repair common Windows errorsFree Scan →Fix the driver behind crashes, sound loss and screen glitchesFind Drivers →Also test the front-end menus. If navigation is delayed everywhere, inspect the controller, USB connection, and display processing first. If menus respond normally but one game does not, compare that game’s emulator, region, and frame-rate settings without changing the entire system.
2. Enable the monitor’s Game Mode or low-latency mode
Open the monitor or television’s own settings and enable Game Mode, Low Latency, or the equivalent option. Disable image-processing features that add delay, such as motion smoothing, frame interpolation, noise reduction, or cinema processing, if the display exposes them.
Do not assume that a faster-looking picture means the output resolution should be forced. A display can run in its native mode with processing disabled. Record the original picture settings so you can restore them if the mode changes color, scaling, or brightness.
3. Compare wireless and wired controllers
RetroPie notes that wireless controllers can add delay. Connect a compatible wired USB controller or temporarily connect the cabinet encoder directly by USB, then repeat the same game test. This is a diagnostic comparison, not a guarantee that every wired device is faster.
Recommended Free Tools
Rank #2
- 5-in-1 USB-C Hub: Experience comprehensive connectivity featuring a Power Delivery input, two USB-A 2.0 ports, a USB-A 3.0 port, and an HDMI port. (Note: The USB-C power delivery input port is only for connecting an external wall charger to power your laptop and cannot power peripheral devices.)
- 90W Pass-Through Charging: Achieve optimal charging with 90W pass-through power to your laptop, supported by a total input of 100W, with the hub reserving 10W for operational efficiency. (Note: Wall charger not included.)
- Quick Data Transfers: Accelerate your productivity with rapid data transfers using a high-speed 5Gbps USB 3.0 port and two 480Mbps USB 2.0 ports.
- 4K HDMI Display: Enhance your visual experience with a hub capable of delivering 4K resolution at 30Hz in both mirror and extend modes. Please note that this hub is compatible with MacBook (macOS 12 and newer), Windows 10 and 11, ChromeOS, and laptops equipped with DP Alt Mode and Power Delivery. Note: This device is not compatible with Linux.
- What You Get: Anker USB-C Hub (5-in-1, 4K HDMI), welcome guide, 18-month warranty, and our friendly customer service.
Check compatibility before replacing a cabinet control system. The encoder must be recognized by the operating system and emulator, and its button mapping must fit the cabinet. A controller that works on a desktop may not map correctly to an arcade encoder or front-end.
4. Check the game’s region and refresh rate
Retro games commonly have region variants with different timing. NTSC versions commonly run at 60 Hz, while PAL versions commonly run at 50 Hz. If the display, emulator, and game region do not agree, motion can feel uneven or controls can appear mistimed.
Confirm which version you are running and whether the emulator is synchronized to the display’s refresh rate. Do not convert this general regional distinction into a promised lag measurement; it is a timing clue that helps explain why two versions of the same game can feel different.
5. Isolate emulator settings instead of applying global tweaks
RetroPie warns that many latency tweaks found online are unsupported, ineffective, or dependent on particular hardware. Avoid copying a frame-delay, driver, or rendering option globally without confirming that it is supported by your Pi generation and that the board has enough performance headroom.
What’s actually slowing this PC down?
Pick the symptom - the matching free tool is one click away.
Use this order:
- Return emulator-specific latency and video options to their known defaults.
- Test with the display’s low-latency mode enabled.
- Test a wired controller.
- Confirm the game’s region and refresh context.
- Change one emulator option, test the same game, and note the result.
If a change causes a blank screen, severe stutter, or an unresponsive front-end, revert that single change using your saved settings or a second display and keyboard. Do not stack several undocumented tweaks; doing so makes it impossible to identify which one helped or caused the failure.
Input-lag symptom guide
| Symptom | Most useful next check | What it does not prove |
|---|---|---|
| Menus and every game respond late | Enable display Game Mode, then compare a wired controller. | It does not prove the display is the only source. |
| Only wireless play feels delayed | Repeat the test with a compatible wired controller or encoder. | It does not prove every wireless device has the same delay. |
| One game or emulator feels wrong | Check that emulator’s defaults, region, and refresh behavior. | It does not justify changing global driver settings. |
| Motion is uneven rather than simply delayed | Compare NTSC/PAL timing and the display’s supported refresh mode. | It does not establish a numeric latency value. |
Correct screen scaling, borders, and clipping
First decide whether you have a black border or cropped content. A border usually indicates underscan or scaling that leaves unused space. Cropping at the edges usually indicates overscan or an incompatible output geometry. The fixes are not interchangeable.
Black border: check display scaling first
- Open the monitor’s aspect-ratio or picture-size control.
- Try a mode such as Native, 1:1, Just Scan, or Full Pixel, using the label your display provides.
- Check whether the monitor is applying its own underscan or a computer-versus-video scaling preset.
- Apply the change and verify that the entire desktop or front-end remains visible.
Raspberry Pi documentation notes that disabling overscan can remove a black border on some displays. That setting is not a universal cure: a display may create a border itself, and disabling overscan on a signal that actually needs it can expose clipped text.
Rank #3
- Sleek 7-in-1 USB-C Hub: Features an HDMI port, two USB-A 3.0 ports, and a USB-C data port, each providing 5Gbps transfer speeds. It also includes a USB-C PD input port for charging up to 100W and dual SD and TF card slots, all in a compact design.
- Flawless 4K@60Hz Video with HDMI: Delivers exceptional clarity and smoothness with its 4K@60Hz HDMI port, making it ideal for high-definition presentations and entertainment. (Note: Only the HDMI port supports video projection; the USB-C port is for data transfer only.)
- Double Up on Efficiency: The two USB-A 3.0 ports and a USB-C port support a fast 5Gbps data rate, significantly boosting your transfer speeds and improving productivity.
- Fast and Reliable 85W Charging: Offers high-capacity, speedy charging for laptops up to 85W, so you spend less time tethered to an outlet and more time being productive.
- What You Get: Anker USB-C Hub (7-in-1), welcome guide, 18-month warranty, and our friendly customer service.
Cropped edges: check overscan and the monitor’s crop mode
If the first line of text, a menu edge, or the score disappears beyond the panel, inspect the monitor’s scaling control and the operating system’s display configuration. Raspberry Pi documentation recommends enabling overscan when initial text disappears beyond the screen edge.
Do these 3 things before closing this tab:
1Scan for outdated or missing drivers - takes under a minute2Repair Windows errors before they cause bigger problems3Fix the driver behind crashes, sound loss and screen glitchesUse the monitor’s own controls before editing boot files. Some displays call the relevant setting Overscan, Zoom, Screen Fit, or Picture Size. Select a mode that shows the full signal, then test the front-end and a game.
Let EDID select a supported mode
Raspberry Pi normally reads the display’s EDID data and selects a mode the attached panel reports as supported. This is safer than guessing a resolution because EDID includes information about available sizes, aspect ratios, and refresh rates.
Before forcing anything, verify:
- The panel’s native resolution.
- The panel’s aspect ratio.
- Refresh rates accepted by the panel and any HDMI converter.
- Whether the converter board changes the signal or exposes incomplete EDID information.
A converter that reports the wrong capabilities can make a valid mode unavailable, but forcing a random mode can create a blank screen, flicker, or additional scaling.
Force a mode only when it is necessary
Use a forced resolution only when automatic mode selection is wrong, the converter does not provide usable EDID, or the installed operating system documents a specific requirement. Select a mode that matches the panel’s native geometry and supported refresh rate. Apply the control documented for your installed OS and Pi board; do not assume that a setting shown for an older image still applies to a current display stack.
Outdated Drivers Are Slowing You Down
One free scan finds every outdated or missing driver and matches the right update for your exact hardware.Free scan · exact hardware matchPC Slower Than It Used to Be?
A free scan shows the junk files, broken settings and background clutter dragging Windows down - then fixes them in one click.Free scan · Windows 10 & 11Keep a recovery method ready: a known-good monitor, keyboard access, a backup of the original configuration, or a way to remove the last change from the boot media. If the screen goes blank immediately after a forced mode, revert that setting rather than adding another override.
Why old config.txt advice can mislead
Raspberry Pi’s legacy configuration documentation describes overscan and EDID-related options for older firmware arrangements. Current Raspberry Pi operating systems and display stacks may expose different controls or ignore old options. Treat legacy config.txt instructions as version-dependent, not as universal commands for every Pi.
Rank #4
- Dual Converters, Infinite Potential：Includes 2× USB C male to USB A female adapters and 2× USB A male to USB C female adapters. Perfect for a wide range of uses—tablets with Bluetooth keyboards, expand USB ports on macbook, and more. Two different converters for all your daily needs
- Next-Level 10Gbps & 3A Charging: No more slow 480Mbps, this usb to usb c adapter has a transfer speed of up to 10Gbps, allowing you to do more transferring in less time. This usb adapter fits both USB A and USB C charger, supporting up to 3A fast charging
- Upgraded Exquisite Craftsmanship: With an aluminum alloy housing and metal connector, the usbc to usb adapter is extremely durable and sturdy. Rigorously tested to withstand more than 10,000 times of plugging and unplugging, ensuring long-lasting performance
- Broad Compatible: The usb c to usb adapter widely supports all USB C/ USB A devices like laptops, tablets, cellphones, car chargers, and phone chargers. Such as compatible with MacBook Pro/Air 2023/2022, Thunderbolt 4/3 Devices,Apple MagSafe Watch 9/8/7/SE/Ultra, iPad Pro 2022/2021, Samsung Galaxy S23/S20/S10, and iPhone 17/16/15 Pro. Plug and play
- Please Note: To reach 10Gbps speed, keep the cable under 3.3 ft. For USB A Male to USB C adapters, try flipping the USB C connector. USB C Male to USB A adapters support bidirectional 10Gbps transfer within 3.3 ft
One legacy recommendation is to disable overscan on the display itself to avoid double scaling by both the GPU and the display. That can be appropriate in the firmware and software combination for which it was documented, but it should not replace checking the current OS’s display settings and the monitor’s scaling mode.
Scaling decision table
| What you see | Likely category | First action |
|---|---|---|
| Uniform black margin around a complete picture | Underscan or display-side scaling | Check the monitor’s native/1:1/full-pixel mode, then review overscan. |
| Text or game edges cut off | Overscan or display crop | Enable the documented overscan behavior and choose a non-cropped monitor mode. |
| Stretched characters or circles | Aspect-ratio mismatch | Match the output and monitor aspect ratio; do not solve it by arbitrary enlargement. |
| No signal after a resolution change | Unsupported forced mode | Revert to automatic EDID selection or a confirmed native mode. |
Restore audio by tracing the actual output path
Silent audio is usually a routing or physical-connection problem before it is an advanced firmware problem. Start at the speakers and work back toward the Pi.
1. Map the physical audio path
Identify which device is supposed to make sound:
- HDMI: audio travels with the video signal to a display or HDMI audio extractor.
- USB audio: a USB sound device feeds powered speakers or an amplifier.
- Headphone or analog output: available only on Pi models and configurations that provide it.
- Separate amplifier: the Pi or display sends a signal to an amplifier, which then drives the topper speakers.
Confirm that the speakers are powered, the amplifier has the correct input selected, and the cable is connected to the intended output. A speaker wired to an amplifier cannot play audio from an unselected HDMI output, and a passive speaker cannot be driven directly by a port that is not designed to power it.
2. Select the correct output in the front-end
Use the operating system’s current sound controls and RetroPie’s EmulationStation Audio menu to select the output that matches the physical connection. If the menu lists HDMI, USB, or analog choices, select only the path that is actually wired and test again.
Do not add an audio adapter merely because the screen is silent. First verify the selected output, cable, amplifier input, and speaker power. A USB audio adapter is relevant only when the speaker arrangement requires USB audio or the existing output is unsuitable.
3. Raspberry Pi 4: check HDMI0 versus HDMI1
For Raspberry Pi 4, RetroPie documentation says HDMI0 has audio enabled by default. If the display is connected to HDMI1, select that second HDMI output in EmulationStation’s Audio menu. This is a Pi 4 and RetroPie-specific clue; it should not be generalized to every Pi model, operating system, or software image.
After changing the output, restart the front-end or the system if the menu requests it, then test a game and a front-end sound. If HDMI1 still produces no audio, verify the monitor or converter accepts audio on that input and that the amplifier is connected to the display’s audio path.
Best Value
- 5-in-1 Connectivity: Equipped with a 4K HDMI port, a 5 Gbps USB-C data port, two 5 Gbps USB-A ports, and a USB C 100W PD-IN port. Note: The USB C 100W PD-IN port supports only charging and does not support data transfer devices such as headphones or speakers.
- Powerful Pass-Through Charging: Supports up to 85W pass-through charging so you can power up your laptop while you use the hub. Note: Pass-through charging requires a charger (not included). Note: To achieve full power for iPad, we recommend using a 45W wall charger.
- Transfer Files in Seconds: Move files to and from your laptop at speeds of up to 5 Gbps via the USB-C and USB-A data ports. Note: The USB C 5Gbps Data port does not support video output.
- HD Display: Connect to the HDMI port to stream or mirror content to an external monitor in resolutions of up to 4K@30Hz. Note: The USB-C ports do not support video output.
- What You Get: Anker 332 USB-C Hub (5-in-1), welcome guide, our worry-free 18-month warranty, and friendly customer service.
4. Use EDID information as a capability check
HDMI devices can report their supported audio and video capabilities through EDID. If the display or converter reports no audio capability, the Pi may not offer the expected HDMI audio mode. Check the converter’s specifications and the current OS’s detected output before overriding anything.
Legacy Raspberry Pi documentation describes EDID audio overrides that can make the system treat formats as supported or unsupported. These are advanced, potentially consequential settings. They are not a first step for a basic silent-output problem and should be considered only after confirming the current output selection, display capabilities, and physical wiring.
Audio troubleshooting table
| Physical arrangement | What to verify | Common mistake |
|---|---|---|
| Display speakers through HDMI | Correct HDMI port, display volume/mute, and selected HDMI output. | Assuming video on an HDMI port proves that audio is enabled on the same path. |
| Pi 4 display on HDMI1 | Select HDMI1 in EmulationStation’s Audio menu. | Leaving the HDMI0 default selected. |
| USB sound device and amplifier | USB device selected and amplifier input and power confirmed. | Expecting HDMI audio to feed a separate USB amplifier. |
| Analog output where available | Correct Pi model, cable, powered amplifier, and analog selection. | Connecting passive speakers directly to a low-level output. |
| HDMI converter or extractor | Audio support, EDID reporting, and output connector wiring. | Assuming every video converter passes audio. |
A complete diagnostic sequence
Use this order when the topper has more than one symptom. It prevents a display change from hiding an audio or controller fault.
The Tool Desk
Outbyte Driver Updater FREEFix the driver behind crashes, sound loss and screen glitchesFind Drivers →Outbyte PC Repair FREEClear out junk files and repair common Windows errorsFree Scan →- Document the hardware. Record the Pi model, OS, front-end, monitor, converter, controller, amplifier, and speaker connections.
- Return to a known baseline. Remove recent undocumented emulator, video, or audio overrides and keep a copy of any configuration you must edit.
- Check the picture without changing resolution. Use the monitor’s native or full-pixel mode and determine whether the issue is a border or cropped content.
- Enable the monitor’s low-latency mode. Disable extra image processing and repeat a consistent game test.
- Compare controller connections. Test a compatible wired controller or encoder against the wireless setup.
- Check game timing. Identify the region variant and compare the emulator’s behavior with the display’s supported refresh rate.
- Trace audio physically. Follow the cable from the Pi to the display, amplifier, or speakers; confirm power, input selection, and mute state.
- Select the matching software output. Use the current OS controls and EmulationStation’s Audio menu. On Raspberry Pi 4, pay particular attention to HDMI0 versus HDMI1.
- Test one change at a time. Record what changed and whether the same game, menu, and audio test improved.
- Use advanced overrides last. Consider legacy overscan or EDID settings only when the current OS documentation and the detected hardware justify them.
What to compare when choosing or replacing hardware
If the existing monitor, converter, controller, or audio device must be replaced, compare the complete interface rather than a single advertised specification.
| Component | Required comparison |
|---|---|
| Display panel | Native resolution, aspect ratio, supported refresh rates, input connectors, and low-latency or Game Mode behavior. |
| HDMI converter or scaler | Input and output interfaces, supported modes, EDID behavior, and whether audio is passed through. |
| Pi board | Generation, available display outputs, analog-audio availability, OS support, and performance headroom for the selected emulator. |
| Controller or encoder | Wired or wireless connection, operating-system recognition, cabinet compatibility, button mapping, and cable length or receiver placement. |
| Audio chain | HDMI, USB, or analog source; amplifier input; speaker power requirements; and whether the display or converter exposes audio. |
The sources do not establish a standard specification for a DIY arcade topper. A panel that is correct for one build can be unsuitable for another if its aspect ratio, refresh support, connector, or audio path differs.
Common mistakes to avoid
- Forcing a resolution first: automatic EDID selection normally provides a supported mode; forcing an unverified mode can create a blank display.
- Confusing a border with clipping: underscan and overscan require opposite investigations.
- Copying old boot-file advice: legacy
config.txtoptions are version-dependent and may not apply to the current display stack. - Changing several latency settings at once: unsupported or hardware-dependent tweaks make failures difficult to undo.
- Blaming the emulator for every delay: the monitor’s processing and a wireless controller can add delay before emulator settings matter.
- Assuming video proves audio: an HDMI link can show a picture while the selected audio output, converter, or amplifier path is wrong.
- Buying accessories before checking routing: a new HDMI cable or USB audio adapter is justified only when the existing cable, port, capability, or connection is demonstrably unsuitable.
Final checklist
- Display Game Mode or equivalent low-latency mode is enabled.
- A wired controller comparison has been completed when wireless delay is suspected.
- The game region and refresh context are understood.
- The monitor’s native resolution and aspect ratio are known.
- Black borders and cropped edges have been treated as different problems.
- EDID-based mode selection has been tried before forcing a resolution.
- Any legacy
config.txtchange has been matched to the installed OS and board. - The physical audio route, amplifier input, and speaker power have been verified.
- On Raspberry Pi 4, HDMI0 and HDMI1 selection has been checked in EmulationStation.
- Every change has been made and tested separately with a recovery path available.
When these checks do not resolve the issue, the missing information is usually platform-specific: the exact Pi generation, display or converter model, operating system, emulator, controller encoder, or audio wiring. Those details are necessary to prescribe a command safely; a universal topper fix would risk replacing one problem with an unsupported configuration.
Quick Recap
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
Free tools Windows power users keep installed
One-click scans. No signup required.
