Introduction
This digital audio playback module is designed to provide a versatile and high-quality audio experience. It features a 2.8-inch 320x240 high-resolution IPS color screen for clear display of playback status and decoding information. The module supports various audio sources including Bluetooth audio, TF card, USB disk, computer USB sound card, and LINE input. It also offers 7 preset EQ modes and 1 custom EQ for personalized sound adjustment, along with I2S digital audio output.
Safety Precautions
- Always connect cables strictly according to the provided diagrams. Avoid plugging cables randomly to prevent damage to the device.
- This decoder board requires a regulated 5V DC power supply. Do not use a power supply higher than 5V or lower than 4.5V to avoid damaging the board.
- The cables connecting the interface board and the motherboard should not be excessively long. USB and TF card interface cables are high-speed signal cables and should not exceed 20 cm to maintain signal integrity and stability.
Setup and Connections
The product features a split design, consisting of a main decoder board and various interface boards for peripherals. The mainboard handles button controls and display functions, connecting to peripherals via 2.0mm pitch ribbon cables.
Package Contents:
- PH2.0/2-pin connector ×1
- PH2.0/5-pin connector ×1
- PH2.0/8-pin connector ×1
- PH2.0/4-pin connector ×1
- PH2.0/3-pin connector ×1
- USB interface board ×1
- TF card interface board ×1
- Infrared interface board ×1
- Encoder interface board ×2
- Decoder board main unit ×1
- Remote control ×1
Operating Instructions
1. Mode Selection
The main screen allows you to select different operating modes: Music Mode, BT Mode, Line-In, PC Mode, or System Settings.
2. Button Functions
- VOL+ Button: Volume Up.
- VOL- Button: Volume Down.
- OK/PAUSE Button: Confirm/Pause/Play. When playing from a USB drive or TF card, press and hold for 1 second to switch between loop modes: ALL (Loop All), ONE (Loop a Single Track), FOL (Loop Within a Folder), or RAN (Random Play).
- PREV Button: Previous Track/Left Select.
- NEXT Button: Previous Track/Right Select.
- EXIT Button: Exit a page.
- FOLDER Button: When playing from a USB drive or TF card, press and hold to display the file directory preview.
3. CE11 Extended Encoder Knob Functions
- Encoder Knob 1: Rotate left or right to switch between tracks. Press down to exit a track.
- Encoder Knob 2: Rotate left or right to adjust the volume up or down. Press down to confirm, play, or pause.
4. Audio Playback Interfaces
5. PC Mode and System Settings
6. Sound Effect Adjustment
This product comes with seven common sound effects: "Normal," "Rock," "Pop," "Classic," "Jazz," "Country," and "Heavy Bass," plus one "Custom" sound effect.
For detailed custom sound effect adjustments, please refer to the "Custom Sound Effect Adjustment Instructions.pdf" document, which can be found at this link.
Specifications
| Parameter | Value |
|---|---|
| Screen Size | 2.8 inches |
| Screen Resolution | 320*240 pixels |
| Bluetooth Name | Bluetooth Audio (user-customizable) |
| Bluetooth Version | V5.3+BR+EDR |
| Bluetooth Reception Range | Approximately 10 meters |
| Audio DAC Hardware Bit Depth | 24-bit |
| Audio Output Channels | 2-channel |
| Output Audio Signal Level | ≤2.4Vp-p |
| Audio Output Signal-to-Noise Ratio | SNR≥104dB |
| Audio Output Signal Power | ≤50mW (supports direct headphone driving; external amplifier required for speakers) |
| Operating Voltage | 4.5-5.0V (Requires regulated power supply) |
| Operating Current | 30-150mA (Mainboard current only; varies by operating state; excludes peripheral current) |
| Format | Bitrate (kbps) | Sampling rate (in Hz) | Bitwidth | Channels |
|---|---|---|---|---|
| MP3 | Full bitrate, supports Layer 1, Layer 2, and Layer 3 | 8k/11025/12k/16k/22050/24k/32k/44100/48k | 24-bit [decoded bitwidth] | Single/dual channel |
| WAV | PCM formats exceeding 12-bit * 2 channels * 48kb are not supported. [3-bit IMA, ALA, and ULAW are not supported.] | 8k/11025/12k/16k/22050/24k/32k/44100/48k | 8k/11025/12k/16k/22050/24k/32k/44100/48k WAV support 8/16/24/32-bit PCM, 4-bit IMA, and 4-bit MS ADPCM | Single/dual channel |
| WMA | Unencrypted Windows Media Audio formats are supported. [Windows Media Audio Professional, Windows Media Audio Lossless, Windows Media Audio Voice, or encrypted files are not supported.] | 8k/11025/12k/16k/22050/24k/32k/44100/48k | 24-bit [decoded bitwidth] | Single/dual channel |
| APE | 1. Lossless formats generally have a compression ratio of around 50%. Encoded files are all VBR. The specific bitrate is not known until encoding is complete. Various decoders support various bitrates. The speed bottleneck is reading the data (device read speed). | 8k/11025/12k/16k/22050/24k/32k/44100/48k | 24-bit [decoded bitwidth] | Single/dual channel |
| FLAC | 2. APE decoding is supported. Fast, Normal, and High are supported. High mode is not supported. Encoding a High mode file using the Monkey's Audio compression tool can be tested. | 8k/11025/12k/16k/22050/24k/32k/44100/48k | 24-bit [decoded bitwidth] | Single/dual channel |
Note: Decoding lossless audio or high bitrate will be limited by the reading speed of the USB disk/TF card device.
Maintenance
To ensure the longevity and optimal performance of your audio decoder module, follow these general maintenance guidelines:
- Keep the module in a clean, dry environment, away from dust and moisture.
- Avoid exposing the module to extreme temperatures or direct sunlight.
- Do not use harsh chemicals or abrasive cleaners on the screen or casing. Use a soft, dry cloth for cleaning.
- Ensure proper ventilation around the module to prevent overheating.
Troubleshooting
If you encounter issues with your audio decoder module, consider the following common troubleshooting steps:
- No Power: Ensure the 5V DC power supply is correctly connected and within the specified voltage range (4.5-5.0V). Check all power connections.
- No Audio Output: Verify that audio cables are securely connected. If using an external amplifier, ensure it is powered on and correctly configured. Check volume levels on both the module and connected devices.
- Display Issues: Check cable connections to the display. If the screen is blank or flickering, ensure the power supply is stable.
- USB/TF Card Not Reading: Ensure the USB drive or TF card is formatted correctly and contains supported audio files. Check that the cables connecting the USB/TF card interface boards to the mainboard are not too long (max 20 cm) and are securely connected.
- Bluetooth Connection Problems: Ensure the module is in BT Mode and discoverable. Check that your Bluetooth device is within the 10-meter reception range and is not connected to another device.
- Unstable Operation: Ensure a regulated 5V power supply is used. Avoid using unstable power sources like 3.7V lithium batteries.
User Tips
- For optimal sound quality, experiment with the 7 preset EQ modes or create a custom EQ setting to match your speakers and personal listening preferences.
- When using USB drives or TF cards, ensure they are of good quality and speed to avoid limitations in decoding lossless or high-bitrate audio.
- If you plan to integrate this module into a custom audio project, carefully review the connection diagrams and precautions to ensure proper installation and avoid damage.
Support and Documentation
For additional guidance and detailed instructions, including custom sound effect adjustments, please refer to the official user manual PDF:
- User manual (PDF): View Item Guides & Documents
Technical guidance for DIY modifications is not provided with this product. Buyers intending to modify speakers must assess their own modification capabilities before purchasing.