Philips series, Telechips TCC730\/TCC731 series, SKYLARK chip
First, Philips series. Philips decoding chips generally use the BGA packaging process, and the domestic technology in this area is quite limited, in addition, because Philips decoding chips need to work together with another control chip circuit, so the product cost is high. Therefore, the manufacturers using Philips decoding chip are often positioned in the middle and high price, such as MPIO and IRIVER, two Korean MP3 professional manufacturers.
TCC730\/TCC731 series of Telechips. If equipped with more high-end headphones, there will be a certain improvement. This type of machine will generally be standard with Sennheiser MX300 (or OEM Sennheiser) headphones, which belong to the Sennheiser popular MX series of the most civilian headphones, so it is recommended that friends with higher requirements for sound quality can try Sennheiser MX500, or a more upscale KOSSSP\/KOSSPP. Sennheiser PX100\/PX200. Because the MP3 using this chip has certain potential in sound quality.
3. SKYLARK chip. At present, the domestic button machine is used, but it does not support WMA at present, the price is similar to STMP3410, and the function is more complete. The main features of Skylark are low power consumption and clear and pleasant sound quality. Recording to generate MP3 format files, optionally compressed bit rate; Coding direct recording function, and can adjust the compressed bit rate according to needs; Built-in FM radio.
There are four main audio decoding chips (DAC) on the market: Philips, sigmatel, wolfson and the domestic Action
Now there are fewer Philips chips, and even Philips' own walkman is now basically sigmatel. Now as far as I know, there are Gome x750, x780, as well as the old Meizu M3 and M6 non-SL models, and oppo d27, but in addition to Gome's machines, the others have been relatively difficult to find.
Due to the performance, power consumption and price of 3710, sigmatel now basically monopolized low-end pure tone machines, such as Taiwan's x19, Blue Devil's V7, Onda's vx898, and of course, Philips sa28, sa43 and so on
Ousheng's general pure tone machine is relatively small, basically used in the video machine. For example, Taipower's M26, M30, T50 and other products, oppo's s11, s9, etc., the whole line of smart devices, and of course, Meizu's M6sl and the new version of M3 that has recently been announced to stop production.
Action's chips are generally used in low-end machines, such as Onda's 898, Blue Devil's R1, and of course, some low-end products of iriver, such as the Chinese red version of mplayer, are used by Action.
In addition to these four kinds of chips, there are some domestic and Korean chips, such as the red chip in the video machine, but in terms of sound quality, there are still no mainstream four kinds of good.