Product knowledge

Product knowledge

Mar 16 / 2021

Virtual Low Frequency Brings You Real Feelings

Author:Jian-Qiang, Li

Regarding music replay, "bass" plays an important role. Especially for customers in America and China pay more attention to the bass performance. However, many audio solutions cannot effectively reproduce the low frequency of the sound, which is restricted by the output performance, unit size, unit material and level of the system.

In recent years, people used the principles of sound psychology to create a more diverse sound experience in the originally limited space, structure, and equipment. It realizes different sound effects through the relationship between the signal received by ears and the feelings in the mind.

The "virtual low frequency" developed by AppoTech recently applies related principles to give listeners a better low-frequency effect. It strengthens the relevant harmonic components through calculations so that people will perceive bass enhancement after hearing it. If the bass is sufficient, and the music replay will touch your heart deeply. Generally, the drum's depth, the strength of the middle drum, the tone of the bass cello, and the bass guitar are all related to the system's ability to output low frequencies. If enough bass can be reproduced truly, the quality of music replay is bound to be improved.

Many people use equalizers to adjust and compensate for insufficient bass. This is obviously a commonly used method, but it also needs to understand different frequency ranges and makes suitable adjustments. Otherwise, the effect may not be desirable. If the equalizer’s filtering process is relatively general; strengthening the low frequency may make the sound muddy and even affect the clarity and layering. Using “virtual low frequency” to enhance the bass experience can solve these problems. It is based on the combination and increase of harmonics, allowing the bass experience to be reproduced more naturally.

For headphone applications, "virtual low frequency," can generally be applied to different headphone units to boost bass. If for speaker applications, it is necessary to consider that different speakers have different resonance frequencies. Therefore, we recommend adjusting it depending on different Fo resonance frequency versions to avoid vibration and noise when the low frequency is excessive. Appropriate noise. The default Fo versions are 0hz, 80Hz, 120Hz, 150Hz, and 180Hz, you can check the speaker's Fo resonance frequency to select the version closest to its Fo.

The author listened to Tsai Qin's song with "virtual low frequency" and found that the depth and strength of the bass drum are completely different. The richness of brass instruments is significantly increased.
Although the bass is relatively strong; the medium and high frequency will not overwhelm or reduce its clarity. The sound effect is suitable for European and American dance music or hip-hop music. In addition, to make the sound of drums more shocking, the sound field and rhythm must be improved. The strength of the low frequency can be adjusted to satisfy different people's requirements.