Eversolo DMP Series Room Correction Guide

Room Correction on the Device

This section details how to perform room correction directly on the Eversolo DMP device.

1. Preparations

Environmental Requirements:

• Keep the room quiet and minimize any external noise.
• Make sure the speakers are positioned correctly.
• Turn off any unnecessary lights and electronic devices in the room.

2. Specific Steps

Microphone Selection

1. Choose a USB microphone.
2. Select the microphone calibration file (if available).
3. Place the measurement microphone at the best listening position as instructed by the software.

Screenshot Description: A mobile app screen titled 'Microphone Selection'. It prompts the user to 'Select the best listening position' and provides instructions to place the microphone at ear height. Below, there are fields for 'Microphone Selection' (showing 'EVERSOLO EM-01') and 'Microphone calibration file' (showing '2439110011.txt'), with a 'Next step' button.

Volume Test

1. Click “Play Sound” and ensure the volume falls between -60dB and -20dB.
2. Once the volume test is complete, click “Next step” to proceed.

Screenshot Description: A mobile app screen titled 'Volume Test'. It advises to 'Please keep quiet' for accuracy and shows a volume slider ranging from -100dB to 0dB, with the current level indicated around -37dB. It includes a 'Play Sound' button and a 'Next step' button.

Acoustic Measurement

1. Select whether to combine left and right channels for measurement.
2. Click “Start Measuring”, and the DMP will begin playing the frequency response sound.
3. Once playback is complete, the audio curve will be automatically analyzed.

Screenshot Description: A mobile app screen titled 'Acoustic Measurement'. It shows a 20-second countdown and indicates 'Left Channel Measurement in Progress'. Options are available to combine left and right channels for measurement, with a 'Start Measuring' button at the bottom.

Measurement Curve

1. The captured audio curve will be displayed. If you are not satisfied with this recording result, you can go back and retake the measurement.
2. Click “Start design” to generate the filter.

Screenshot Description: A mobile app screen titled 'Measurement curve'. It displays an audio frequency response curve with axes labeled from 20Hz to 20kHz. Buttons for 'Left', 'Right', 'Start design', and 'Measure Again' are visible.

Filter Design

1. The DMP will automatically generate filters by analyzing the curve.
2. Review the curve to understand the acoustic issues in the room.

Screenshot Description: A mobile app screen titled 'Filter design'. It shows multiple overlaid curves representing target, measured, EQ, and predicted values for left and right channels. Options include 'Apply to Configuration' and 'Export'.

Filter Settings

Adjust based on your room's characteristics:

1. Target Curve: The standard for your room's acoustic properties, ensuring the calibrated sound meets this benchmark.
2. Smoothing: Adjust the smoothness of the EQ curve to reduce noise and create a softer sound.
3. Frequency Range: Set the correction frequency range according to specific needs.
4. Maximum Gain: The maximum volume increase allowed by the EQ curve to prevent distortion and clipping.
5. Target Gain: The gain applied to the target curve, used for room acoustic correction.

Screenshot Description: A mobile app screen titled 'Filter Setting'. It lists adjustable parameters: 'Target Curve' (set to FLAT), 'Smooth left' (1/12 smoothing), 'Smooth right' (1/12 smoothing), 'Frequency range' (20hz~20000hz), 'Maximum gain' (5.0db), and 'Target gain' (-40.0db). A 'Confirm' button is present.

Apply to Configuration

Directly apply to current FIR configuration.

Export

Select a folder to export to. The exported file can be applied to various configurations.

Room Correction by Using Eversolo Control AppScreen

This section details how to perform room correction using the Eversolo Control App on your smartphone.

1. Preparations

Environmental Requirements:

• Keep the room quiet and minimize any external noise.
• Make sure the speakers are positioned correctly.
• Turn off any unnecessary lights and electronic devices in the room.

Install the Eversolo Control App on your phone.

2. Before Testing

Pairing with Eversolo Control App

Launch the Eversolo Control App, add the DMP, and then select the device to enter the main interface.

Screenshot Description: A mobile app screen showing the Eversolo Control App interface. The device is identified as 'DMP-A10' with audio settings like 'EQ DSP', 'XLR/RCA', 'PCM 96 KHz', and '-43.5 dB'. Navigation options include 'Source', 'Music', 'Files', 'Streaming', 'Cast', 'Room Correction', and 'Settings'.

Enter Room Correction Module

On the app's main interface, tap “Room Correction” to enter the calibration process.

3. Start Testing

Microphone Selection

1. Choose an external USB microphone or your phone's microphone.
2. Select the microphone correction file (if available).
3. Place the USB measurement microphone or the phone at the best listening position as instructed by the software.

Screenshot Description: A mobile app screen titled 'Microphone Selection'. It prompts the user to 'Select the best listening position' and provides instructions to place the microphone at ear height. Below, there are fields for 'Microphone Selection' (showing 'EVERSOLO EM-01') and 'Microphone Correction File' (showing '2439110021.txt'), with a 'Next' button.

Volume Test

1. Click “Play Sound” and ensure the volume falls between -60dB and -20dB.
2. Once the volume test is complete, click “Next” to proceed.

Screenshot Description: A mobile app screen titled 'Volume Test'. It advises to 'Please keep quiet' for accuracy and shows a volume slider ranging from -100dB to 0dB, with the current level indicated around -37.61dB. It includes a 'Stop Playing' button and a 'Next' button.

Acoustic Measurement

1. Select whether to combine left and right channels for measurement.
2. Click “Start Measuring” and the DMP will begin playing the frequency response sound.
3. Once playback is complete, the audio curve will be automatically analyzed.

Screenshot Description: A mobile app screen titled 'Acoustic Measurement'. It shows a 20-second countdown and indicates 'Left Channel Measurement in Progress'. Options are available to combine left and right channels for measurement, with a 'Start Measuring' button at the bottom.

Measurement Curve

1. The captured audio curve will be displayed. If you are not satisfied with this recording result, you can go back and retake the measurement.
2. Click “Start designing” to generate the filter.

Screenshot Description: A mobile app screen titled 'Measurement Curve'. It displays an audio frequency response curve with axes labeled from 20Hz to 20kHz. Buttons for 'Left Channel', 'Right Channel', 'Design', and 'Measure Again' are visible.

Filter Design

1. The DMP will automatically generate filters by analyzing the curve.
2. Review the curve to understand the acoustic issues in the room.

Screenshot Description: A mobile app screen titled 'Filter Design'. It shows multiple overlaid curves representing target, measured, and equalization for both left and right channels. Options include 'Apply to Configuration' and 'Export'.

Filter Settings

Adjust based on your room's characteristics:

1. Target Curve: The standard for your room's acoustic properties, ensuring the calibrated sound meets this benchmark.
2. Smoothing: Adjust the smoothness of the EQ curve to reduce noise and create a softer sound.
3. Frequency Range: Set the correction frequency range according to specific needs.
4. Maximum Gain: The maximum volume increase allowed by the EQ curve to prevent distortion and clipping.
5. Target Gain: The gain applied to the target curve, used for room acoustic correction.

Screenshot Description: A mobile app screen titled 'Filter Settings'. It lists adjustable parameters: 'Target Curve' (set to FLAT), 'Smooth left' (1/12 smoothing), 'Smooth right' (1/12 smoothing), 'Frequency Range' (20 Hz - 20000 Hz), 'Maximum Gain' (5.0 dB), and 'Target Gain' (-37.2 dB). A 'Confirm' button is present.

Apply to Configuration

Directly apply to current FIR configuration.

Export

Select a folder to export the file. The exported file can be directly used in various configurations.

Note: After importing the FIR filter, room correction will only take effect if the corresponding DSP configuration interface is enabled.