The performance test of MP3 is mainly to simulate a piece of music and the output of the digital signal after being processed by the main control chip, and then compared with the original signal. It is not to listen to the sound quality with the ear, but to watch it with several stages of high, medium, bass and aliasing.

The MP3 sound quality of the Sigmatel decoding chip is average, with brighter sound, average midrange performance, insufficient low volume sense, and stiffer treble.

After the test was completed, Kang Wenbin jumped up and shouted: "Brother Chen, you are so amazing. Now the high-school bass and aliasing are restored very well, which is comparable to Philips' chips."

Liu Chen breathed a sigh of relief and worked continuously for almost 24 hours. He completed the first version of the algorithm in a very short time, but the sound quality performance is still not satisfactory, especially when the tone range of a song is relatively wide.

Although it doesn't sound obvious to ordinary people, many people who buy MP3 are music enthusiasts nowadays. If they can't make a shot, it's no different from those poor-quality public model products, and they will destroy everyone. If they can't make money, they may lose all their losses if they have more than 300,000 yuan. This shot cannot be lost.

Lan Jun looked at the happy expressions of the three of them, and couldn't understand what the waveform on the oscilloscope meant, and he also laughed stupidly, "Hehe, Liu Chen, you are really awesome."

"Stop talking nonsense, why are you back so soon? How are you doing?"

Lan Jun took out a few packages from his bag and said stinky: "Flash memory, the main controller orders 10,000 yuan, and the male model's shell is also done. How do you see?"

"Ten thousand? So much!" Liu Chen was really shocked. According to his expectations, it would be quite good to sell 20,000 units throughout the summer. After all, the shipments in Feicheng are relatively small.

He also prepared to improve his appearance after the first batch of goods was delivered.

Lan Jun has a good relationship with many people in Feicheng Electronic City. They directly distribute goods here and radiate downwards. It is probably not a big problem to sell 2,000 units in the first batch.

You have to eat rice one bite at a time, and it is impossible to become a fat man all at once.

"Didn't you tell me to get as much goods as possible? How about it, I'm so awesome."

Liu Chen didn't blame him either. He looked at the shell and found that this was a very typical appearance. Apart from the logo, it could be said that it had no characteristics. There was no way. In order to seize the time to go on the market, I had to do so. One end directly uses a USB interface according to the requirements and can be used directly as a USB disk.

I was just a little uneasy. This step was too big. If the sales were not ideal, the consequences would be unimaginable, and I didn’t make any money, and I would be owed high foreign debts, I would be in tears.

Liu Chen's uneasiness can only be transformed into paranoid requirements for product quality.

"Sigmatel master control chips almost concentrate all hardware functions. As long as an external FLASH memory and some simple resistor and capacitance components are connected, this is a complete MP3 player. Despite this, the design of the PCB cannot be flawed at all."

The importance of the main control chip to MP3 is equivalent to that of a car. Without a good engine, luxury cars will definitely not be able to be built.

But having a good engine does not necessarily mean that luxury cars can be built.

For MP3, the PCB design of the circuit, the welding process, the circuit board material and the material selection of components are all very important.

The two brothers of the Kang family almost collapsed.

Liu Chen continued: "Too much is not too much. We have made great progress. Let's go back to sleep now. After resting, come over and work hard to assemble the first official MP3 today."

Lan Jun's enthusiasm was ignited and he said, "Why don't we just start doing it? I'll be very excited to think about it and can't sleep at all."

Of course, he was still hit by a woman and couldn't sleep. He was so excited that he was now.

Liu Chen said, "Developing algorithms requires inspiration. It may take more time to interrupt them, so I ask you to keep insisting on PCB optimization, which requires experience and multiple experiments. Don't work so hard, go back and rest first."

All of them went back to sleep.

...

Gong Hui has been taking a shower after she returned home.

She washed over and over again, then slowly calmed down and woke up completely. Although her head still hurt a little, her career frustration was calmed down.

A sense of courage filled her heart again. A great Chinese company, can't find a product with good quality and moderate price? Isn't Aiguo Company only two years ago? To be honest, it was the Moonlight series that was launched this year that made it a domestic first-tier brand.

She was stubborn and did not admit defeat. She did what she thought of. She quickly searched more than 20 companies developing MP3 through some friends, preparing to inspect one by one, and maybe she could find suitable products. As long as the quality and price are met, she would have the confidence to promote it completely.

So what about Soni Company? It was just an inconspicuous small company at the beginning.

She put on her professional suit and set off with her suitcase. As soon as she went out, she received a text message from Yang Kai, "I asked you to lead the negotiations with Tanaka. Now Zhang Jia has reached a cooperation intention with him. This world only looks at the results but not the process. You disappoint me."

Gong Hui took a look and turned off her phone directly. She now had no distractions and insisted stubbornly that as long as she found a good product, she could turn the situation around. Can Soni be able to sell well? She didn't believe it, and didn't want to believe it.

I went to seven companies in one day, distributed in East China, the first one is near the Central Ring Road in Jianghai. Several students who claim to be Jianghai University started their businesses. After looking at their data and surreal appearance design, Gong Hui could only say that her ideas were good, but this product may take a long time to go on the market, and the price was ridiculously high.

When she proposed the price, one of the young men retorted with a hard neck: "We have spent a lot of effort to develop this MP3. We will prove our name for China, defeat the Korean and Japanese, and enter the US market."

Gong Hui sighed and left, listening to her passion, but it was unrealistic.

The second company is also in Jianghai. She spent more than 200 yuan on taxi fare and then walked two kilometers before finding the company. It was in a warehouse area. The group of people were very polite and enthusiastic to her. Gong Hui was disappointed when she saw the product.

Typical shoddy public model products, such small workshops are in Shenzhen, and there are not a hundred or eighty ones. The more important thing is that the price of this product has not been very low, and it has no competitiveness, so it can only make a laughing stock.

The third one is in Sucheng, the fourth one is in Kuncheng, and four or five are in Cangcheng.

...

She ran around all day and returned to Jianghai. She felt very tired, only endless disappointment. She didn't want to stay for a moment, but just ran to the airport and returned to Shenzhen.

She stood at the airport and looked at the vast night outside, thinking complicated. Am I wrong? Although these small factories and large factories use the same main control chips and the same FLASH, no matter the rough shell, even the quality is bad. This cannot be called a product at all, but can only be a model that realizes functions.

With such a big Chinese, can't I find a product that is truly industrially designed? She felt deeply disappointed and even despair, not only about China's products, but also her precarious career. No wonder Tanaka dared to speak so arrogantly.

No matter how rampant he is, the quality of Soni's products is obvious to all.
Chapter completed!