Digital audio processing (DSP) in car radios based on Android often causes distortion, delays or unnatural sound. Many owners are faced with a situation where the factory DSP settings spoil the quality of the music: too aggressive equalizers, artificial effects or incorrectly configured filters. You can disable DSP completely or partially in several ways - from standard settings to deep changes in system files.

In this article we will look at radio tape recorders all current methods for disabling DSP for radios Pioneer, Sony XAV-AX, Joying, Atoto and other popular brands. It is important to understand that the interface and available options may vary depending on the model and firmware version. Some radios allow you to deactivate DSP in two clicks, while others will require manual editing of configuration files or even flashing.

Before you start making changes, make sure that the problem is in the DSP, and not in the equalizer settings, audio file bitrate or speaker connections. To diagnose, try listening to tracks from different sources (USB, Bluetooth, radio) - if distortion persists in all modes, most likely the digital processing module is to blame.

What is DSP in a radio and why turn it off

DSP (Digital Sound Processing) is a technological complex that modifies the sound signal in real time to improve perception. In car radios, DSP may include:

  • 🎛️ Equalizers (pre-configured or custom)
  • 🔊 Crossovers (frequency separation for the subwoofer and speakers)
  • 🎵 Environment effects (imitation concert hall, stadium, etc.)
  • 🔄 Phase correction and time delays for sound synchronization
  • 📉 Compressors/limiters (automatic volume control)

Manufacturers often configure DSPs for the “average” user, but such universal profiles rarely take into account the characteristics of a particular speaker system or musical preferences. As a result, owners are faced with:

  • 🔇 Muted high frequencies (due to excessive smoothing)
  • 🎶 Artificial “pumped up” bassthat trembles in low tones
  • 🕒 Sound delay (lag) when playing video or streaming
  • 🔊 Distortion at high volume (due to aggressive compression)

Disabling DSP allows you to return “clean” sound, where signal processing is reduced to minimum. This is especially important for music lovers who use high-quality audio files (FLAC, WAV, DSD) or external amplifiers with their own settings.

📊 What radio do you use?
Pioneer
Sony XAV-AX
Joying
Atoto
Another brand
I don’t know the model

Method 1: Disabling DSP through standard radio settings

Most modern radios Android (especially models of 2020 and newer) allow you to deactivate DSP directly in the menu. The interface may differ, but the general logic remains the same. Let's consider a typical path for popular brands:

For radios Pioneer (series AVH, DMH, SPH):

  1. Hold the button MENU on the panel or touch the gear icon on the screen.
  2. Go to Sound settings → DSP Settings (or Audio Control).
  3. Find the option DSP Mode and select Off or Bypass.
  4. Save the changes and reboot the radio (optional).

For radios Sony XAV-AX:

  1. Press HOME → Settings → Sound.
  2. Select Equalizer → DSP.
  3. Switch the slider DSP Processing to position Off.
  4. In some models you will need to additionally disable Sound Optimization.

For Chinese radios (Joying, Atoto, Dasaita):

  1. Go to Settings → Sound → Equalizer.
  2. Look for the tab DSP or Audio Effects.
  3. Disable all effects (including 3D Surround, Bass Boost).
  4. In some firmware there is a separate switch Hardware DSP —it also needs to be deactivated.

☑️ Preparation for disabling DSP

Done: 0 / 4

If your model does not have an explicit option to disable DSP, try resetting all sound settings to factory settings (Reset Audio SettingsSometimes this leads to deactivation of default processing.

⚠️ Attention: On some radios, disabling DSP can lead to complete loss of sound in certain modes (for example, when connecting via Bluetooth). In this case, you will need to return the settings back or use alternative methods.

Method 2: Manual editing of configuration files (for advanced)

If the standard settings do not allow you to disable the DSP, you will have to work with system files. This method is suitable for radios on a clean Android (for example, Joying, Atoto or flashed devices). You will need:

  • 🔧 Root access (or the ability to mount the system partition in recording mode).
  • 📱 File manager with superuser rights (for example Root Explorer or FX File Explorer).
  • 💾 Backup copy of original files (required!).

Main files responsible for DSP:

Path to file Description Action
/system/etc/audio_effects.conf Audio effects configuration Comment out or delete lines with dsp, effect
/system/vendor/etc/audio_policy.conf Audio processing policy Find block dsp_manager and disable it
/system/build.prop System properties Add line persist.audio.dsp.enabled=0
/data/local.prop Local settings Create file with command setprop persist.audio.dsp.enabled 0

Editing example audio_effects.conf:

# Replace the line:

libraries {


dsp {


path /system/lib/soundfx/libdsp.so


}


}


With:


libraries {


# dsp {


#   path /system/lib/soundfx/libdsp.so


# }


}

After changes:

  1. Save the files and set the rights 644 (rw-r--r--).
  2. Reboot the radio.
  3. Check the sound - if DSP is still active, try disabling services via ADB:
adb shell

su


setprop persist.audio.dsp.enabled 0


stop audioserver


start audioserver

⚠️ Attention: Incorrect editing of system files can lead to loss of sound completely or a boot cycle of the radio. If after the changes the device does not turn on, a flashing will be required via USB OTG or SD card.
What to do if the sound disappears after editing the files?

If the sound disappears, first check if the speakers are disabled in the settings (Settings → Sound → Speaker OutputIf this does not help, return the original files from the backup). copies. As a last resort, reset the radio to factory settings via recovery mode (Recovery Mode), holding down the button Reset when turning on.

Method 3: Using third-party applications to bypass the DSP

If the first two methods did not work or you do not want to take risks. system files, you can bypass DSP at the software level. For this, specialized audio players and utilities are suitable that process sound bypassing standard modules Android.

The best applications for pure sound:

  • 🎵 USB Audio Player PRO - supports USB DAC, bypasses the built-in DSP and uses its own decoders for FLAC, DSD, MQA.
  • 🔊 Poweramp —has an option Direct Volume Control and its own equalizer that can replace DSP.
  • 🎧 Neutron Music Player —offers 32/64-bit audio processing with minimal distortion.
  • 🛠️ ViPER4Android —allows you to completely redefine the audio processing chain (requires root).

Setting USB Audio Player PRO to bypass DSP:

  1. Connect the radio to the Internet and install the application from Google Play.
  2. Start the player and go to Settings → Audio.
  3. Activate the options:
    • Use USB Audio (if an external DAC is connected)
    • Bypass Audio Effects
    • Direct PCM Output
  • In the section Output select OpenSL ES or AAudio (depending on the support of your radio).

    • For ViPER4Android (required root):

    1. Install the application and drivers from the official website.
    2. In the settings, select Audio Driver → Legacy Mode.
    3. Disable all effects in the section DSP → Master Limiter and Convolver.
    4. Activate Bypass System Effects.
      5. 💡

      If your radio supports output via USB DAC (for example, Topping D10s or iFi Nano iDSD), connect it directly. This will completely bypass the built-in DSP, since audio processing will occur in an external device.

      Problems after disabling the DSP and their solutions

      Disconnecting the DSP does not always go smoothly:

      Problem Possible cause Solution
      The sound became quieter DSP enabled automatic volume normalization Increase the volume manually or use Poweramp with the option Preamp
      Distortion at high volume There is no limiter (limiter), which previously cut off the peaks Reduce the volume or adjust the equalizer manually, reducing the low frequencies
      No sound via Bluetooth DSP controlled the routing of audio streams Reconnect the device or enable DSP only for Bluetooth in settings
      Audio delay in video DSP compensated for hardware decoder delays Use the player with a synchronization setting (for example, VLC or MX Player)
      The radio does not work DSP processed the FM/AM signal Return the DSP for the radio or use an external tuner

      If after disabling the DSP the sound became worse, perhaps the problem was not in the processing, but in incorrect settings. equalizer or poor quality of audio filesTry:

      • 🔍 Test the radio with WAVhigh-resolution files (24 bit / 96 kHz).
      • 🎛️ Reset the equalizer to a flat profile (Flat).
      • 🔌 Check the speaker connections (phasing, polarity).
      💡

      If the sound gets worse after turning off the DSP, this does not mean that processing was needed. Often users simply get used to the “colored” sound, and the clear signal seems unusual at first. Give yourself 2-3 days to evaluate the real quality.

      How to check if the DSP is really disabled

      Not all radios honestly disable the DSP through the menu - sometimes processing continues to work in the background To make sure that the DSP is really deactivated, perform the following tests:

      Test 1: Listening to test signals

      • Download sine sweep (sine wave from 20 Hz to 20 kHz) in format WAV.
      • Play the file through the radio. If the DSP is active, you will hear:
        • 🔊 Unnatural gain/attenuation of certain items. frequencies.
        • 🎵 "Jerking" or artifacts in the high-frequency range.
      • With DSP disabled, the scan should sound smooth, without jumps.

      Test 2: Measuring sound delay

      • Connect the radio to a TV or monitor via HDMI or AV.
      • Turn on video with clear sound (for example, a clap or click).
      • Compare the delay between image and sound. If DSP is disabled, the lag should be reduced to 20-50 ms (versus 100-300). ms with processing).

      Test 3: Checking via ADB

      Connect the radio to the computer and run the command:

      adb shell dumpsys media.audio_flinger

      In the output, look for lines with effect or dspIf they are missing or. have status disabled, processing is disabled.

      Test 4: Comparison with external DAC

      • Connect USB DAC (for example, DragonFly or iFi Hip-Dac).
      • If the sound is through DAC is noticeably cleaner, which means the built-in DSP of the radio is still active.
      ⚠️ Attention: Some radios (for example, Sony XAV-AX5000) use hardware DSP, which cannot be disabled programmatically. In this case, only replacing the firmware or using an external sound processor will help.

      Alternatives to disabling DSP: fine tuning instead of completely turning it off

      If you can’t completely disable DSP or the sound without it seems too “empty”, try minimalistic settings instead of turning it off completely. Most radios allow:

      • 🎛️ Disable individual effects (for example, leaving only the equalizer).
      • 🔇 Reset DSP profile to neutral (Flat or Off).
      • 🔊 Adjust crossovers manually according to your acoustics.
      • 🕒 Reduce delays in the synchronization settings.

    Example of setting up a minimalistic profile DSP:

    1. Go to Sound Settings → DSP → Custom Profile.
    2. Disable all effects except the equalizer:
      • 🔸 3D Surround = Off
      • 🔸 Bass Boost = Off
      • 🔸 Loudness = Off
      • 🔸 Time Alignment = 0 ms
  • In the equalizer, set all sliders to the neutral position (0 dB).
  • Save the profile as Minimal and activate it.

    • For radios with support DIRAC or Dolby Atmos:

    • Disable all "smart" modes (Auto EQ, Dynamic Volume).
    • Select profile Studio or Pure Direct (if available).
    • Reduce the processing level to a minimum (for example, Light Processing).

    If your radio supports loading custom DSP profiles (for example, via WAVimpulse response files), you can create an empty profile in the app REW (Room EQ Wizard) and load it into the device. This will actually reset all processing settings.

    FAQ: Frequently asked questions about disabling DSP in the radio.

    Is it possible to disable DSP on a radio without root access?

    Yes, in most cases, DSP is disabled through standard sound settings. However, on some radios (especially budget Chinese models), to completely disable it you will need to edit system files, which is impossible without rootTry the method using third-party players first (USB Audio Player PRO or Poweramp), which can bypass DSP at the software level.

    After disabling DSP, the sound via Bluetooth disappeared. What should I do?

    This is a typical problem, since many radios use DSP for routing Bluetoothaudio. Solutions:

    • Return DSP only for Bluetooth in the settings (if there is such an option).
    • Use Bluetooth-adapter with support AptX LL (low latency) and connect it to AUX input.
    • Update the firmware of the radio - such bugs are often fixed in new versions.

    How to disable DSP only for certain sources (USB, radio)?

    Some radios (for example, Pioneer DMH-Z5350BT) allow you to configure DSP separately for each source:

    1. Go to Sound Settings → DSP → Source Select.
    2. Select a source (for example, USB or FM Radio).
    3. Disable DSP only for it, leaving processing for other modes.

    If there is no such option, use separate profiles in the player (for example, in Poweramp you can set different equalizers for different folders).

    Will disabling DSP affect navigation (Google Maps, Yandex.Navigator)?

    As a rule, no. Voice prompts of navigators are transmitted through a separate audio channel, which does not depend on the DSP. However, if after turning off the DSP the voice becomes quieter or disappears, check:

    • Volume settings Navigation in the radio (sometimes they are tied to Bluetooth or Notification Volume).
    • Option Ducking (automatic muting of music during voice prompts) - it may need to be turned on manually.

    Is it possible to disable DSP on the radio with Android 12/13?

    Yes, but the process may differ due to changes in the audio stack Android. In new versions of the OS, the DSP is often integrated at the HAL (Hardware Abstraction Layer)level, which makes it difficult to disable it. Try:

    • Use ViPER4Android with support AAudio.
    • Install custom firmware (for example, Hal9k Mod for radios Joying).
    • Connect an external one USB DAC with its own DSP.

    On some radios (for example, Sony XAV-AX8000) disabling DSP in Android 12 leads to resetting the settings after a reboot. In this case, only firmware with a modified audio driver will help.