Perfect sound five-step vivo X1 sound quality evaluation

The BBK vivo X1 claims to be the world's first Hi-Fi-class smartphone, not only with the Cirrus Logic CS4398+CS8422 decoding solution, but also from high-quality music content, software-level sound quality, hardware decoding. Five aspects of professional sound effects and standard headphones have made great efforts for the purest sound quality; now, for the sound quality special evaluation launched by vivo X1, we will also take everyone to understand the usefulness of these five aspects, and Everyone brought the listening test of this "Hi-Fi smartphone".

The birth of Hi-Fi sound in the backgammon vivo X1 has come from five aspects:

First of all, the content sound source, through the integrated Baidu online music for the vivo X1 to provide free genuine lossless format music download; at the software level through the VRS signal lossless technology to achieve 44.1khz/48khz sampling frequency of the sound source are lossless decoding to eliminate Android SRC drawbacks; hardware The decoding level guarantees pure sound quality through the combination of the star's CS4398 + CS8422 chip; the professional SRS/BBE sound effect is followed by a more gorgeous sound field effect for you with more needs; finally the voice of the vivo X1 is matched by the Baia MMX71iE. Performance headphone output.

Only a few vendors in the smartphone use a separate chip for audio decoding. The utility here can be roughly equivalent to the independent sound card on the PC. The vivo X1 is the first Hi-Fi level independent audio solution CS8422+. The CS4398 chipset is ported to the phone.

The CS4398 is Cirrus Logic's top-of-the-line decoder chip that supports 24-bit/192kHz decoding with a signal-to-noise ratio of 120dB and distortion of -107dB. The CS8422 further enhances the output signal quality. High-end CD player manufacturers, including Marantz, MBL, Innovation, and Yamaha, have adopted this solution in their own products.

It is well known that the complex and highly integrated circuit design of mobile phones has a very serious impact on audio signals. For the sake of pure audio signals, vivo X1 separately designs a power supply solution for DAC chips, using a high efficiency and low noise boost. IC, which provides up to 5V working voltage for DAC chip, and imported high quality tantalum capacitor to ensure good power supply environment of DAC chip and give full play to its top audio decoding capability.

In terms of circuit design, vivo X1 optimizes the layout of audio signals, avoiding interferences such as power supply and radio frequency, and achieving the optimal performance of HIFI performance indicators.

In addition to local use, the music content in vivo X1 also directly integrates Baidu online music; in addition to supporting common MP3, AAC, WMA formats, the format also supports FLAC and APE, WAV lossless formats; But it is not able to support the cue directory of the entire track lossless audio.

Due to the problem of the underlying language of the Android system, there is a loophole in audio playback, that is, the 48khz sampling rate converted to 44.1khz will be inferior SRC. This problem of being inferior SRC caused the audio signal to be distorted and worn out in the Android device, generating a lot of noise, and the stereo playback level and other indicators were all damaged. The audio quality of the high-quality music mother-child band, high-definition video, games, etc., which are more demanded by users, is higher than the sampling rate of 44.1khz; therefore, it is inevitable that the sound quality is damaged.

In the comparison test of the general Android mobile phone and the backgammon vivo VRS-based smart phone, we can see that the vivo X1 Android mobile phone using VRS technology does not have the signal source confusion of other smart machines, but is close to The perfect state of the standard. The purity of the signal source is guaranteed.

For the user, if there is no 48khz audio playing on an Android device similar to VRS technology, the left and right channel crosstalk, large noise, layering disappearance, loss of stereoscopic space, and distortion of the sound may occur. And if you play 48khz audio on an Android device similar to VRS technology, it will maintain the excellent separation of the left and right channels, the stereoscopic sense of layering, the signal quality is very close to the original sound level, and the sound fidelity is high.

Based on the high-quality sound output, vivo X1 still provides users with professional sound effects of SRS+BBE dual configuration; SRS sound effect is used to create a wider sound field for users and to accurately position different audio reverberations. The instrument finally creates an immersive 3D sound field with just two speakers; the SX tuning of the vivo X1 also allows for autonomous adaptation of different styles of music.

Compared with the modified sound effect of SRS, the reductive sound effect of BBE is more important for those who pursue the original sound quality. BBE is generated for the audio signal during the conversion, transmission, amplification and playback due to the factors of sound source and equipment. The distortion is reasonably and effectively corrected and compensated, so that the listening effect is closer to the desired effect of the music work itself - that is, the "original taste" we understand.

Finally, and the most critical place, the author brings you a subjective listening test on the vivo X1, using the equipment for the vivo X1+ original Beyerdynamic MMX 71iE earplugs.

As far as the earplugs are concerned, Baia's products are generally not too vocal, and the MMX 71ie will not be too radical. In terms of actual hearing, the sound of the MMX 71ie earphones is more moisturized with the vivo mobile phone, which has reduced the feeling of Baiya’s clear white water. The Vivo mobile phone is still not a problem when driving the MMX 71ie. For the first time, the audition experience is a warm front end. It is more in line with contemporary music's expression of sound, so it is quite flattering.

The volume of the bass is obviously good, with a good sense of volume, the elasticity is quite good, the potential is acceptable, and the texture is not lost. In terms of the intermediate frequency, the sound is slightly squeaky, but it is not too thick, the sound is solid and full, and the vocal grasp is quite appropriate. The treble performance of the overall match is not bad, but it can't be too good; the high frequency is a bit bleak, it has certain extensibility, and there are not too many short boards.

In the form of expression for music, the test is carried out in a step-by-step manner. First of all, the vivo+MMX 71ie earphones are completely stress-free in the modern and contemporary minimalist musical forms. They are well-prepared for the bass and have a good interpretation of the intermediate frequency. For music with no more than five voices in modern music, It is the best way to interpret.

It is also sufficient to compose classical music forms. Although it is a closed cavity earplug, there is no soft rib in the music that does not count too much instrumental music and concentrated sound. The sound field can meet the music requirements of small compilation. From then on, we can also hear the sound separation is good, the interpretation of the three frequency bands is not bad, the resolution is acceptable.

In the large-scale music types, such as the standard interpretation of symphonic music interpretation, it is obviously not enough. The vertical and horizontal sound fields are not up to the requirements. In some instrumental concertos, you can feel the obvious feeling of overcrowding. Clear, the details are also lost. So there is no bigger music to test.

In the overall sound performance, the digital taste is slightly thicker, and the sound is quite serious, but in fact, this sound quality is quite good in the mobile phone. This kind of sound adjustment and orientation is more suitable for the listening preferences of the contemporary people. Even a good-quality earphone with a better sound is obviously the tone of modern music listening. Don't think too much about serious music.