Lg Tv’s Digital Sound Out: Pcm Vs. Auto, A Definitive Comparison

When connecting external audio devices to your LG TV, you’ll encounter the option of selecting “PCM” or “Auto” for the Digital Sound Out setting. This setting determines how the audio signal is transmitted from the TV to the audio device. Understanding the difference between these options is crucial for achieving optimal audio performance.

PCM: Precision and Lossless Audio

PCM (Pulse-Code Modulation) is a digital audio format that represents analog audio signals using a series of binary digits. It preserves the original audio waveform without any compression, resulting in lossless audio transmission.

Advantages:

• Provides the highest audio quality with no loss of detail.
• Ideal for critical listening, such as with high-end audio systems.

Auto: Automatic Optimization for Compatibility

Auto mode allows the TV to automatically determine the best audio format based on the capabilities of the connected audio device. It typically selects PCM when the device supports it and Dolby Digital or DTS when the device supports those formats.

Advantages:

• Ensures compatibility with a wide range of audio devices.
• Simplifies setup and eliminates the need for manual configuration.

When to Use PCM

• High-quality audio systems: If you have a high-end audio system, such as a home theater or soundbar, that supports PCM, it’s recommended to use this setting to maximize audio quality.
• Critical listening: For critical listening applications, such as mixing and mastering audio, PCM provides the most accurate and detailed audio representation.

When to Use Auto

• Convenience: Auto mode is ideal for users who want a simple and straightforward setup without the need for technical knowledge.
• Compatibility: It ensures compatibility with a wide range of audio devices, including older devices that may not support PCM.
• Dynamic content: For content with varying audio formats, such as movies with both Dolby Digital and PCM tracks, Auto mode automatically switches between formats as needed.

Other Considerations

• Bitrate: PCM bitrate can vary depending on the source audio. Higher bitrates provide better audio quality but may not be supported by all devices.
• Sample rate: The sample rate of the audio signal also affects audio quality. Higher sample rates produce more accurate audio but require more processing power.
• Audio device capabilities: The capabilities of the connected audio device will ultimately determine the available audio formats and settings.

The Bottom Line: Informed Decision-Making

Understanding the difference between PCM and Auto for LG TV Digital Sound Out enables you to make informed decisions based on your specific needs. For the highest audio quality, PCM is the preferred choice when supported by the audio device. However, Auto mode provides convenience and compatibility for a wider range of devices and content.

Answers to Your Questions

1. What is the difference between PCM and Auto for Digital Sound Out?

PCM preserves the original audio waveform without compression, while Auto automatically selects the best audio format based on the connected device.

2. When should I use PCM?

Use PCM for high-quality audio systems and critical listening applications where lossless audio is essential.

3. When should I use Auto?

Use Auto for convenience, compatibility with various devices, and automatic format switching for dynamic content.

4. Does PCM always provide better audio quality than Auto?

Yes, PCM typically provides the highest audio quality, but it may not be supported by all devices.

5. Can I change the Digital Sound Out setting while audio is playing?

Yes, you can change the setting in the TV’s audio settings menu while audio is playing.