An HDMI converter bridges gear that uses different video/audio signals so they can work together. It can:

• Change formats: Convert analog (RCA/composite) to digital (HDMI) or vice versa.
• Translate standards: Connect DisplayPort, DVI, VGA, or USB‑C sources to HDMI displays.
• Scale and adjust: Some units handle resolution scaling (e.g., 480i to 720p/1080p) and aspect ratio switches (4:3 vs 16:9).
• Extract audio: Route sound to speakers via optical, coaxial, or analog outputs.

Most converters are one‑way (direction matters) and often need external power. Performance can vary by source quality, cables, and settings, but the right converter can simplify mixed‑generation setups.

Great question—people mix these up a lot.

• Adapters are usually passive. They don’t change the signal; they just adjust the connector (think HDMI to DVI plug). They’re best when both ends already speak a compatible digital language.
• Converters are active. They do change the signal (e.g., RCA to HDMI, HDMI to AV, DisplayPort to HDMI) and typically need power.

Also note:

• Many solutions are unidirectional—they only work one way.
• Converters may introduce limits (resolution, refresh rate) and small processing delays.

Choosing the right one depends on the source, the display’s input, and the format you need to end up with.

A quick checklist can help you narrow it down:

• Direction: Confirm if you need HDMI-to-AV or AV-to-HDMI (they’re not interchangeable).
• Inputs/outputs: Match your gear (RCA, HDMI, DisplayPort, VGA, USB‑C, optical, 3.5mm).
• Resolution/refresh: Look for the formats you use (1080p, 4K, 60 Hz, 30 Hz).
• Compatibility: Check HDCP handling, PAL/NTSC support, and 4:3/16:9 switching if relevant.
• Power: Many converters need USB power for stable performance.
• Audio needs: Consider optical/RCA outputs if connecting speakers or sound systems.
• Use case: For gaming, lower processing delay can be beneficial.

Review your devices’ manuals and product specs to align features with your setup.

They can be a practical way to bring older gear (like VCRs or retro consoles) to modern TVs, but results vary.

• Picture quality: Converters digitize and scale 480i/576i signals; they won’t create HD detail. Expect softer images and possible artifacts.
• Settings: Use the TV’s aspect controls (and the converter’s 4:3/16:9 switch if available) to avoid stretching.
• Standards: Choose PAL or NTSC correctly to match your source.
• Power and cabling: Most require USB power and good RCA/HDMI cables for stable output.

With the right expectations and setup, they can make legacy devices usable on today’s displays.

Look for an HDMI audio extractor or an HDMI switch with audio outputs. These sit between your HDMI source and TV, then route sound to external speakers.

• Connections: Common outputs are optical (Toslink), coaxial, and analog (RCA or 3.5mm).
• Setup: Connect source → extractor → TV via HDMI. Then run the audio output to your speaker system.
• Formats: If you hear no sound, set the source to PCM/stereo and check volume settings.
• Power: Most extractors need USB power for consistent performance.

Features like 4K/60 support, pass‑through, and lip‑sync adjustments vary, so match specs to your equipment.