subject: Comparable to CD quality sound chip Ai cool Prima User Reviews - chip quality, car audio - auto electronics industry-hc360 HC Network [print this page] Comparable to CD quality sound chip Ai cool Prima User Reviews - chip quality, car audio - auto electronics industry-hc360 HC Network
In the graceful music, through the city's concrete jungle, ride in the Reflections of a country road, no doubt a very pleasant thing, music, passion and speed are the birth, the release of a catalyst for youth. U.S. SIRF Company introduced the latest generation of GPS processing chip, in addition to search satellite positioning, map navigation technology with unmatched advantages in multimedia has also seen success, recent users about the use of prima chips cool P530 so far peak Ai the unofficial nature of the subjective sound quality evaluation, to share the following:
Test models: Ai Feng Yuan cool P530
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Test models: Ai Feng Yuan cool P530
Core platform: prima
Test platform: Pioneer FM CD Germany Maishi Ka Po Po Mai Shika 800w 8 speaker amplifier speaker system
Test method: AUX audio directly into the + FM launch
Test models: Ai Feng Yuan cool P530
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For GPS products, high-end products and low-end products in the function, difficult to pull large gap between the functions can be said, are basically the same, but the difference between the performance of each function is very large. Despite all the GPS products have the music player function, but many low-end products, this function better than nothing, because the sound quality is generally not satisfactory. This problem is common automotive CD audio is also above the existence of many low-end car CD sound quality, and not better than low-end GPS.
Test models: Ai Feng Yuan cool P530
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The value of high-end products, is to provide enough functionality, while ensuring the performance of each function to achieve a relatively high level, so each function has a practical and appreciation of, reliability. Based on prima chip away peak Ai cool P530 was based on such design in mind.
Test models: Ai Feng Yuan cool P530
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For digital audio products, CPU, audio decoder chip, operational amplifier, resistive and capacitive components, PCB design will produce relatively large on the sound effects, especially in high-quality external amplifier and speaker after the various distinctions shortcomings will be fully exposed
Test models: Ai Feng Yuan cool P530
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Test track:
01 synthesizer snow blowing Guo Feng
02 female a cappella audition equation
03ShaniaFuain pop
04 Ferry Tsai pop
05 Dabancheng male chorus girl, eight eyes
06 Hotel California Eagles
07 Drum Poem first drum Yan Xuemin Yan Huang
08 Peking Opera Red Lantern Girls
09 Zhang San Tsai Chin pop song
10 King Bass Bass
11DenonHi-Fi Orchestra
12 Porogi his instrumental music
13 pipa on saxophone instrumental
14 popular songs of the Yellow River dried up the water Tengger
15 Mutter Violin 1 solo
16 Moot solo violin 4
17OneILove cappella Female
18 Zangxin Tracy songs
19 Mountain and Flowing Water Zheng
20 Butterfly Lovers Violin
21 fever classical symphony
22 Guqin musical instruments on the suona Hunting Polka symphony
23
24 Albert Au pop Crush on You
A subjective quality evaluation, SNR
Signal to noise ratio, ie SNR (SignaltoNoiseRatio) also known as signal to noise ratio, in short, is the purity of sound. A narrow sense refers to the amplifier output signal voltage and noise while the output voltage ratio, often expressed in decibels number. The higher signal to noise ratio of equipment that it produces less noise. General, the greater the SNR, indicating mixed signals in the noise in the smaller, the higher the quality sound and audio playback, or the opposite. Signal to noise ratio generally should not be less than 70dB, high-fidelity speaker for more than 110dB signal to noise ratio to be achieved.
Test models: Ai Feng Yuan cool P530
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1, AUX audio cable to connect the headphone jack and GPS Pioneer CD, AUX audio input, at this time, the data line is transmitted through the GPS decoding and amplification of analog audio signals. In this state, signal to noise ratio is considered the main foundation GPS circuit design.
GPS products are ultra-large scale integrated circuits, internal disturbances and simulation of digital disturbance are very serious, if not handled properly, then the noise will be severe, it is surprising that the use of prima chip Ai cool P530 in AUX straight into the state, the pause will be the biggest hit sound amplifier, noise is very weak, almost no smell, performance is very satisfactory.
2, FM launch: the launch of GPS to set the frequency 87.5mhz Pioneer CD radio FM frequency for 87.5mhz, pause playback, the sound hit the most, there is trace of current noise, medium volume, almost if not Press. This is a very good indicator. Ordinary FM launches audio equipment, in a small volume condition, the noise is appalling.
In the "Osaka City girl" and so pure vocal test, no background music track, the AI Cool P530's performance is in place, people sounded the end of a clean, full voice.
Test models: Ai Feng Yuan cool P530
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Subjective quality evaluation II: Distortion
Distortion is about listening with an important indicator of excessive distortion sounds are rigid, made fried discomfort, which is very difficult to do an index.
1, AUX straight into the state, Tsai Chin's "Joe Smith's song", music being very comfortable, Tsai her voice is not only deep and atmospheric, and harmony lines from the depths of the word conveys a very heavy grief love color, more often charming, quietly did not quiet the soul of the listener with a sound grasp.
2, FM launch status: GPS in the FM launch in general, the limited cost, are used more low-end FM transmitter module, a high degree of sound distortion. Yuan Feng Ai cool P530FM launch, the effect was very good, and straight into the AUX state there is no obvious difference in sound quality, but high frequency slightly gray.
Subjective quality evaluation of the three: Transient Response
Equipment on the music burst signals the ability to follow. Transient response signal should be a good device to respond immediately, a stop signal braked to a halt, not dragging its feet. Transient response of the target, for listening to pop music is a very important, it determines the texture and volume to the low-frequency sense.
