The quality of audio playback on smartphones is often perceived as a secondary characteristic compared to a powerful processor or camera quality. However, for millions of users, it is music, podcasts and game audio that are the basis of interaction with the device. Deep bass, clear highs and surround sound can dramatically change the listening experience, turning a standard smartphone into a high-end portable audio station.
In this article, we will take a detailed look at all the available ways to improve the sound on Android: from hidden developer settings and system equalizers to connecting external peripherals. You will learn how to bypass software limitations, choose the right codecs for wireless transmission, and which applications can really unlock the potential of your acoustics.
Basic setup of the system's audio path
The first step towards ideal sound is the proper configuration of the system's built-in tools. Most modern shells, such as One UI from Samsung or MIUI from Xiaomi, offer advanced sound settings menus, which are often ignored by users. First you need to go to the section Settings → Sound and vibration. Here it is important not just to turn the volume to maximum, but to find a balance between the levels of media, calls and notifications in order to avoid digital distortion (clipping) at peak loads.
Particular attention should be paid to the function Absolute Volume (Absolute volume). In stock mode, Android adjusts the volume on both your phone and connected Bluetooth headphones independently, which sometimes results in signal levels getting out of sync. Disabling this feature in the Developer menu allows you to control volume exclusively from the device, providing more predictable results.
⚠️ Warning: Changing settings in the Developer menu may affect the stability of the Bluetooth connection. If after changing the settings the sound disappears or begins to be interrupted, return the settings to the default values.
It is also worth checking for pre-installed sound profiles. Many manufacturers add their own proprietary technologies, such as Dolby Atmos or DTS:X. Activating the Auto or Music mode in these settings often gives a more noticeable increase in quality than manually turning the EQ sliders. Don't forget that turning on surround effects may slightly reduce the overall volume, but will add depth to the scene.
Before changing any audio settings, take a screenshot of the original EQ values. This will allow you to quickly return to the factory profile if the new sound seems unnatural.
Using a system and third-party equalizer
The equalizer is the most powerful tool for correcting the frequency balance for your headphones or speaker system. Standard presets like “Rock”, “Pop” or “Jazz” often work according to a template and do not take into account the individual characteristics of your hearing or the frequency response (amplitude-frequency response) of headphones. It is much more effective to create your own profile, based on subjective feelings or measurement data.
If the built-in equalizer seems too simple to you, you should pay attention to third-party solutions. For a long time, the leader in this area was the application Poweramp Equalizer, which works at the system level and intercepts the audio stream before outputting it to the speaker. For its correct operation, special permissions are required via ADB or presence root access, which opens access to deep audio driver settings.
- 🎚️ Low frequencies (20-250 Hz): responsible for bass and “body” raising the sound adds power, but can cause buzz.
- 🎻 Mids (250 Hz - 4 kHz): Vocals and main instruments reside here, careful correction improves intelligibility.
- 🔔 Highs (4 kHz - 20 kHz): adds air and detail, but excess leads to harshness and ear fatigue.
When manually tuning, try to avoid sudden rises or falls of more than 3-4 dB. Drastic changes in the shape of the EQ curve often introduce phase distortion, making the sound "dirty". It is better to do a slight general lift (pre-amp) or light correction of problem areas. Remember that the purpose of the equalizer is not to change the music beyond recognition, but to compensate for the shortcomings of the playback device.
Bluetooth codecs and wireless data transfer
When using wireless headphones, the sound quality directly depends on the compression codec used. The standard codec SBC (Sub-band Coding) is available everywhere, but it provides the lowest transmission quality due to the high level of data compression. To get high-quality sound on Android, you need to make sure that both your smartphone and headphones support more advanced encoding algorithms.
In the developer menu (Settings → About phone → Build number (7 times) → For developers) you can force the codec to be selected. However, it is better to let the system negotiate the best overall option automatically. The gold standard is currently considered aptX Adaptive i LDAC. Sony's LDAC codec is capable of transmitting up to 990 kbps, which brings the quality of wireless audio closer to wired Hi-Res audio.
| Codec | Max. bitrate | Quality | Compatibility |
|---|---|---|---|
| SBC | 328 kbit/s | Basic | Universal |
| aptX | 352 kbit/s | Good (CD) | Wide (Qualcomm) |
| LDAC | 990 kbit/s | High (Hi-Res) | Android 8.0+ / Sony |
| LC3 | up to 320 kbit/s | Excellent at low bitrates | Bluetooth 5.2 (LE Audio) |
It is worth considering that high bitrates of codecs like LDAC require a stable radio channel. In crowded places or near powerful sources of interference (Wi-Fi routers, microwave ovens), the smartphone can automatically switch to a more stable, but lower quality codec. This is normal system behavior to prevent connection dropouts.
Why is the sound in headphones quieter than on the phone?
This is due to different standards for measuring volume. The phone measures pressure in a free field, while headphones measure pressure in a confined space near the ear. In addition, the impedance (resistance) of the headphones can be high, and the built-in amplifier of the phone cannot produce enough power.
Choosing a high-quality DAC and amplifier
In modern smartphones, manufacturers are increasingly abandoning the built-in 3.5 mm jack connector, integrating the audio path directly into the motherboard or using cheap external adapters USB-C to 3.5. The quality of the built-in digital-to-analog converters ranges from excellent (as in older LG flagships or some Asus models) to downright mediocre. DAC (D/A converters) range from excellent (like older LG flagships or some Asus models) to downright mediocre.
If you use high-impedance wired headphones or sensitive monitors, the built-in output may not be enough. The sound will be quiet, flat and lacking dynamics. The solution would be to purchase an external portable DAC/Amp. These devices are connected via the USB-C port and take on all the work of converting the digital signal to analog, completely eliminating the audio path of the smartphone from the circuit.
⚠️ Attention: When choosing an external DAC, pay attention to the output format support. Some older models may not work correctly with Android 12 and above due to changes in the power management policy of USB ports.
Using an external DAC allows you to hear details that were previously hidden by noise and distortion. You'll notice crisper instrument attack, an expanded stage, and natural note decay. To connect such devices, drivers are usually not required, since Android supports the UAC2 (USB Audio Class 2) device class natively.
An external DAC is the only way to get honest Hi-Res sound on smartphones without a 3.5 mm jack, especially for high-impedance headphones.
Streaming services and application settings
Even a perfectly tuned system will not be able to reproduce what is not in the source file. Most popular streaming services compress audio by default to save bandwidth. To enjoy high-quality sound on Android, you need to go to the settings of each application (Spotify, Yandex.Music, Apple Music, Tidal) and manually set the maximum playback quality.
For example, in Spotify you need to select “Very high” quality (320 kbps Ogg Vorbis), and Apple Music activate the “Lossless” or “Hi-Res Lossless” mode. It is important to understand that to play formats above 48 kHz / 24 bit, an external DAC may be required, since the built-in capabilities of many smartphones are limited to a sampling rate of 48 kHz.
- 📦 FLAC: lossless format, ideal for archiving and listening on good equipment.
- 🌊 MQA: Hi-Res audio compression technology, popular in the Tidal service, requires a certified decoder.
- 🎵 AAC: the main format for Apple Music and YouTube, provides good quality at a moderate bitrate.
It is also worth checking the settings for saving traffic on the mobile network. If Data Saver mode is enabled, the app may ignore your quality settings and stream at a low bitrate. For true connoisseurs of sound, it is recommended to download tracks in maximum quality in advance to eliminate the influence of an unstable Internet connection at the time of listening.
Eliminating interference and optimizing the background
Sometimes the problem of sound quality lies not in the frequencies, but in extraneous noise, crackling or background hum. On Android, this is often associated with an aggressive power saving system that kills the audio process or limits the processor frequency during playback. Adding a music player to the power saving mode exceptions can solve the problem of micro-stuttering.
Another common reason for audio deterioration is background notifications. Sharp sounds of messages can “break through” the music, causing unpleasant volume changes. In Do Not Disturb mode or in special game modes (Game Turbo, Game Launcher), you can configure a ban on playing system sounds while running media applications.
adb shell settings put global volume_steps 100This command, entered through a computer with ADBinstalled, increases the number of volume control steps. The standard 15 steps often do not allow you to fine-tune the comfort level, especially in quiet parts of the composition. Increasing to 50 or 100 steps gives smoother and more precise adjustment, which is critical for sensitive headphones.
⚠️ Attention: Using ADB commands requires USB debugging to be enabled. Be careful when entering commands, as incorrect parameters may reset the system.
Frequently asked questions (FAQ)
Why did the sound in the headphones become quieter after updating Android?
This is a common problem associated with changes in hearing safety limits in new versions of the OS. Check your audio settings to see if Hearing Protection or Volume Limit is enabled. Also try disabling absolute volume in the developer menu.
Does a case affect the sound quality of a smartphone?
Yes, thick cases can block the output holes of speakers or microphones, which leads to muffled sound and problems when making calls. Make sure that the cutouts in the case exactly match the acoustic holes of your device.
Is it possible to improve the sound on a cheap smartphone?
Yes, software methods (equalizers, codec selection) work on any device. However, the physical limitations of the speakers and DAC will not allow them to reach the level of flagships. The best solution would be to use external USB headphones or a portable DAC.
Why do I need Hi-Res sound if I listen in the subway?
In a noisy subway, the benefits of Hi-Res may not be noticeable due to external noise. However, such tracks often have more dynamic mastering and better detail, which is noticeable even in compressed form or when using noise reduction.