5. How to Update the ECHO Firmware？

Download the firmware to your computer, unzip the firmware, copy the [XXX.img] file into the root directory of the ECHO's internal storage, safely eject the ECHO on the computer, and restart the ECHO to automatically upgrade.

Firmware download link：Click

ECHO Music Settings Guide

1.Music Interface

Four visual styles are available: Tape, Cover Art, VU Meter, and Rhythm Visualization.

2.Volume Limit

Sets the maximum allowed volume for the ECHO's output.

3.Playback Mode

Supports Single, Sequential (Order), and Shuffle modes.

Supports folder-skipping during playback.

4.EQ Selection

Supports 6 built-in EQs: Retro, Heavy Bass, Heavy Metal, Pop, Jazz, and Unique.

Supports a 5-band Custom EQ. Use the Previous/Next buttons to adjust values and the Menu button to switch between frequency bands.

5.Filter Settings

Offers 5 built-in DAC filter types: Short Delay Sharp Roll-off, Sharp Roll-off, Short Delay Slow Roll-off, Slow Roll-off, and Non-oversampling. You can select based on personal preference.

6.Gain Switch

Supports two gain levels: High and Low.

7.Fast-Forward/Rewind Switch

When enabled, pressing and holding the Previous/Next buttons while the screen is on will fast-rewind or fast-forward within a track.

8.Volume Button Swap

Allows you to swap the function of the volume up and down buttons according to your preference.

9.Lyrics Display Switch

When enabled, song lyrics will be displayed on the playback screen.

10.Channel Balance

Channel balance allows you to individually adjust the output amplitude of the left or right channel to create a specific listening condition suited to the user. This function is unnecessary for individuals with equal hearing in both ears, as the device's left and right channel outputs are balanced by default.

The default channel balance value is 0. There are 12 adjustable levels for each channel (left and right).