Incorrect calibration of the equalizer on deep bass or sharp high frequencies immediately reveals build defects or a limited frequency range of the device when listening to specialized test records. For accurate diagnostics of the acoustic system, compositions with a wide dynamic range should be used, where each instrument takes its place in the panorama. Standard mp3 files of low bitrate often hide compression artifacts that become audible only on high-quality equipment after competent processing. setting.
The tuning process begins with understanding how different genres affect the hearing aid and speaker membranes. Audiophiles They often use reference records to balance low, medium and high frequencies. Mistaking track selection can cause the user to add extra bass where it shouldn't be, or cut down on useful up-case detail.
⚠️ Warning: Prolonged listening to test signals at maximum volume can lead to irreversible hearing damage or overload of the speaker coil.
Criteria for the selection of test compositions
When selecting material for calibration, it is important to take into account not only the genre affiliation, but also the quality of the original file. Lossless formats, such as FLAC or WAVThey retain the full spectrum of frequencies without compression, which is critical for identifying the nuances of sound. Compressed formats can mask problems with articulation And detailing, giving a false impression of quality sound.
A good test track should contain a recording of real instruments, not just synthesized sounds. Acoustic recordings allow you to assess the naturalness of the timbre and the correctness of the work mid-rangeWhere is the human voice? Digital artifacts often appear in complex areas with many instruments that sound simultaneously.
- 🎼 The presence of a wide dynamic range from quiet whispers to loud climaxes.
- 🎻 Recording of living instruments to check the naturalness of timbral color.
- 🎛️ Clear separation of instruments in the stereo panorama to assess the width of the scene.
Genres for testing low frequencies
Bass range is the most demanding on the power of the amplifier and the size of the speaker membrane. For verification LP section Perfect genres of electronics, dubstep and hip-hop, where there are deep sabbas. It is important to distinguish between a quality, controlled bass and a buzzing hum, which indicates poor body damping or resonance.
In tracks with heavy basses, you should pay attention to the speed of attenuation of the sound after the impact. If the bass "floats" or hums after the end of the note, then the headphones can not cope with the development of transient-characteristics. Right. equalization In this region, you have to remove the turbidity without depriving sound of energy and impact.
There are specialized tracks containing sweeps that smoothly pass the entire range from 20 Hz to 200 Hz. This allows you to find the resonant frequency of the body or to identify dips in the amplitude-frequency characteristic. Such records are indispensable for fine calibration of the parametric equalizer.
⚠️ Warning: Excessively raising low frequencies in the equalizer can cause clipping (digital distortion) even at moderate overall volume.
Medium frequencies and vocals
The average frequency range is responsible for the intelligibility of speech and the bulk of musical instruments. This is where defects known as “boxiness” or excessive sharpness are most often manifested. To test this area, acoustic genres, jazz and vocal compositions are best suited, where the voice of the soloist comes out on the floor. first-hand.
When listening to vocals, it is necessary to assess the naturalness of the timbre. If the voice sounds like a barrel or, conversely, too flat and nasal, a correction in the region of 300-800 Hz is required. Quality. headphones The singer must be able to breathe in and overtones without distortion and metallic sound.
Why does the vocal sound bad?
Often the problem lies not in headphones, but in poor recording or mastering. Some modern tracks specifically make the vocals very bright and aggressive, which on good acoustics cuts the hearing. Always check several different recordings of one artist.
Instruments like acoustic guitar, piano and violin also inhabit this range. Their sound should be voluminous and detailed. If the guitar strings merge into porridge or the piano loses its attack, then resolution The device is insufficient or the settings are down.
High frequency and detail
The upper case is responsible for the air, space and micro-details of the record. Excess high frequencies lead to rapid fatigue and cutting sound, and their lack makes music deaf and inexpressive. To check the HF range, recordings with drum plates, a triangle and the sounds of string bow instruments are used.
A good test is the tapping of castanette or the ringing of keys. These sounds should be clear, but not stabbing. If at high frequencies there is a whistling or hissing (effect "c"), which cuts the hearing, it is necessary to reduce the level in the region of 6-10 kHz. Digital distortions It is also often found in the upper spectrum.
- 🎺 Check for the absence of "sand" and grain in the sound.
- 🎹 Estimation of the attenuation length of the sound of plates and strings.
- 🎧 No whistling or discomfort during long listening.
When you set up equalizer It is worth striving for linearity, not for the screaming tops. Only in the case of a clear lack of air can a pair of decibels be carefully added at frequencies above 12 kHz.
Table of frequency ranges for setting
To systematize the setup process, it is convenient to use a reference table that links frequency ranges with typical tools and possible problems. This allows you to quickly find the right slider in the equalizer when specific artifacts of sound occur.
| Range (Hz) | Tools | Nature of sound | Typical problem |
|---|---|---|---|
| 20 - 60 | Subwoofer, bass guitar | Deep, powerful. | Hooding, no punching |
| 60 - 250 | Bass, rhythm guitar. | Warmth, fullness. | Barrel-shaped, turbidity |
| 250 - 2000 | Vocals, piano | Legitimacy, body. | Telephone effect, sharpness |
| 2000 - 6000 | Tool attack | Presence, brightness | Sharpness, whistling, fatigue |
| 6000 - 20000 | Plates, air. | Details, space. | Hissing, lack of air |
☑️ Checklist of the ACH checklist
Specialized test tracks
In addition to musical compositions, there are engineering recordings created specifically for testing audio equipment. Tracks like that. Speaker Test or Frequency Sweep They allow you to travel across the entire audible spectrum. They help determine the real lower and upper bounds of frequencies that yours can reproduce. headphones.
A special place is occupied by recordings of pink noise, which contains all frequencies with the same energy per octave. This is the perfect tool for initial balance assessment. If pink noise sounds too bright or, conversely, deaf, it means that the frequency of the device is heavily littered in one direction. The use of such records requires caution and an understanding of the principles of acoustics.
⚠️ Warning: Engineering test signals can be recorded at 0dBFS, which at maximum volume is guaranteed to cause overload. Turn down the volume before starting.
To check the stereo effect and phasing, tracks are used with the movement of sound from the left channel to the right. This allows you to identify problems with channel balance or phase distortion, when the sound becomes flat and goes to the head. Right. stereophony It creates a sense of space around the listener.
Use tracks that you know by heart. Familiar music will immediately give out any changes in the sound that you may not notice on unfamiliar material.
Frequent errors in sound calibration
One of the most common mistakes is to try to make the sound "brighter" or "basier" by abruptly raising the corresponding sliders. This disrupts the natural balance of the record and introduces distortions. The best setup is a minimal correction that eliminates obvious defects, not creating a new sound handwriting.
Many users forget to consider the acoustic environment. Setting up in a noisy subway and a quiet room will give different results. In addition, the structure of the ear of each person makes its own adjustments. What is perfect for one may not be acceptable for another, so a universal recipe is a good idea. perfect-sound It doesn't exist.
Ignoring the quality of the source of the signal also leads to erroneous conclusions. It is useless to tune expensive acoustics to a low bitrate stream. Always start by checking the source and then proceed to the manipulation of the equalizer. Only a comprehensive approach will unlock the potential of your audio system.
The main principle of setting up is not to harm. It is better to leave the sound flat than to get a distorted frequency response with artifacts.
How often should I reconfigure the equalizer?
Reconfiguration is rarely required, only when changing headphones, the source of sound or if preferences in genres have changed. The hardware doesn’t change over time, but your perception can adapt.
Does the type of connection (Bluetooth/Cable) affect the setting?
Yes, Bluetooth codecs (SBC, AAC, aptX) make their own changes to the signal and can cut frequencies. It is better to set up on a wired connection or through the best available codec.
Can I use music to tune up to warm up headphones?
It is believed that long-term music play "develops" membranes. Although physical wear is minimal, psychologically, sound can subjectively improve after a few hours of work.
Why do the same tune-up sound different on different tracks?
Different tracks have different mastering and dynamic range. Pop music is often compressed and brighter, jazz is more dynamic. The equalizer cannot compensate for the mastering errors of the original recording.
Do I need special software to set up?
For basic configuration, a built-in equalizer of the player or OS is enough. For professional correction (parametric equalizer) will require special applications such as Equalizer APO.