AK4497EQ DAC Decoder Official Standard Balanced Line I2S/DSD Input Comes with Soft Control | Инструменты

AK4497EQ DAC Decoder Official Standard Balanced Line I2S/DSD Input Comes with Soft Control | Инструменты

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A: Mainboard balance kit with AK4497 chip
B: Balanced to single-ended (RCA) conversion board kit

AK4497EQThe official standardBalance lineDACThe decoder！Supporting plainDSDDecoding！！Our store also has the latest version of the official line Board with better performance, please check our storeOfficial Evaluation 

The latest version of the standard version is the same as the evaluation version without the scoket base board！The simulation section uses standard parameters.，Parameters of the latest official version used in the simulation section of the evaluation version！

2018Years1Month2On the firmware update newDSDPlay Volume Bypass Mode！（Please check the introduction below aboutKIntroduction to port settings）

2018Years7Month23On the firmware updateNew soft mute function，Soft mute is better than hardware such as relay or triode，With the use of the Italian interface, it can be achieved completelyDSDNoise of switching operations such as changing music。Change the partKPort function（For details, please see below aboutKPort introduction）。

Perfect automatic switching with Italian interfacePCM/DSDThe sampling rate may also be implementedDSDChange song noise-free！！

Cooperate with Italian interface to realize automaticDSDSampling rate and method of using soft mute （19Years10Month24Day changed connection，Please check the previous purchase at that timeTransaction snapshot） ：

K5  KPort5No I The Italy interface18Feet

K4  KPort4No I The Italy interface17Feet

K7  KPort7No I  The Italy interface11Feet

These three feet have to be picked up，IsKPort with a capitalIThe one row！It is recommended to match with the Italian interface, which can be achievedDSDModel no noise！If you need to use digital broadcast, we also have Solutions，For more details, please contact Customer Service！

The default product price is semi-finished product kit price（Weld the original patch and some straight plug-ins and test the delivery）；If you need to weld and debug all the originals, please contact Customer Service to change the price.！4497Plate welding debugging good Add money contact customer service ！Balance to single-end conversion board welding debugging add money to contact customer service！

Note：Mainboard balance kit does not include balance to single-end small Board，The small plate is to be left alone to shoot！！！

The price of balance to single-end small board is as follows4497The price of the mainboard purchased together（5534Version），Buy small boards separately and add money for each，Send5534Version，No money of hair5532Version！！！Buy small board connecting line！

！！！The semi-finished product suite！Including board and all components！The patch components have been welded and tested，Direct plug original need to be welded by the buyer，If the buyer has no weldability, please contact Customer Service to increase the price. Our shop will weld all the parts and test the board before delivery.！

Note：The default kit op amp is not soldered！

Note：On the board of the silk-screen printing BZ On behalf of the standard parameters, PG The representative of the evaluation parameters（This version is the standard version.BZThe next argument welding）。

The kit contains all the originals in the corresponding picture！

4497The board simulation section strictly follows the official parameter design，Better than changing parameters or original packages without permission！Balance to single-end plate is also adoptedAKMThe officially designed switching circuit will never affect the effect（In the actual test, the effect of separating the switching lines is the same as that of putting them on a board.；If it is separated, it will affect the effect. Isn't it very bad if the hundreds of thousands of professional equipments are connected with balance lines?）！

！！！Sense of Hearing！！！AK4497Compared toAKMPrevious generation4495Sound improve significantly（The official standard Balance line Balance to single-end Conversion Board test）。The sound is more clear；Analytical better；High frequency is clearer without any confusion；Sound background quieter；Intermediate frequency density，Naiting；Hear real voice more real，Like a singer singing on the spot；Sound layering better；Low-frequency control better，As well as acting freely；Three well-balanced！It is a rare good decoding！

This release supportsI2S/DSDDecoding！

Pure Mesnac（On-board MCUMCU）！Independent DesignI2S/DSDSignal input！

I2SThe highest support 32bitData 768KHzSampling rate！ Note：I2SNeedI2SFormat（Philips format）The data，Left-aligned or right-aligned formats are not supported（Right for Sony format）。At the same time supportDSDDecoding（Native supportDSDDecoding！NotDSDExpandedPCM! Please don't be misled！） ，Support2.8MHz, 5.6MHz, 11.2MHz, 22.4MHz  DSDSampling rate ！

4497The board with a mute function，It can be achieved with the Italian interfaceDSDChange song noise-free！

Support Mesnac volume（VOLPort Access10KSingle Connection potentiometer，The default short-path cap without potentiometer is the maximum volume）!

4497One two-operational amplifier for each sound channel of the board's operational amplifierOPA1612The sound is very good！Balance to single-end board5534（The positive and negative two-a5534），Both of themAKMThe operational amplifier used in the original design，To ensure the effect！

Detailed functional description、KPort features：（KPort function implementation principle isKPort Control single-chip Microcomputer，Then the MCU Mesnac4497Chip）

A、Digital filter settings

A total8ByKPortK1 K2 K3 Settings！As shown in the figure below：

II、DSDSampling rate setting

Four kinds of sampling rate corresponding toDSD64 DSD128 DSD256 DSD512 ThroughKPortK4 K5Settings As shown in the figure below：

Three、DSDPlay mode setting Normal Path（Normal mode） Or Volume Bypass（Volume control bypass mode）。2018Years7Month23The board purchased before the day has different functions，Please check the specific functions at that timeTransaction snapshot

ThroughKPort6No（K6）Settings：K6SettingsDSDPlay mode：Disconnection is Normal Path（That is, the normal mode）,Short-circuiting is Volume Bypass（Volume control bypass mode）。In fact, the working modes of the two modes are pureDSDWays of working,JustNormal Path(Normal mode)You can control the interior ofVrefVoltage or internal amplifier circuit gain to achieve volume control,Volume Bypass(Volume control bypass)The volume control function is turned off。Some people thinkNormal Path(Normal mode)Is to be converted intoPCM，Actually there is no conversion，As long as with the Oscilloscope measurementDACThe output pin of the chip can determineDACIs work inDSDWhetherPCMMode（DSDMode the output isPWMPulse-width-modulated signal，PCMMode is to directly output voltage signal）。

Four、Software mute settings：（Soft mute is recommended，Hardware mute is not recommended。2018Years7Month23The board purchased before the day has different functions，Please check the specific functions at that timeTransaction snapshot）

Five、DSD/PCMThe mode setting

ThroughkPort8No（K8）Settings：

K8 ShortPCMMode，It is not short and emptyDSDMode！Can also beI2SInterface1No pin settingsDSD/PCM，I2SInterface1Number input low level isPCMMode，I2SInterface1No input and a high levelDSDMode。

PS:In useI2SInterface1Foot switchPCM/DSDShould beKPort8No Disconnect，In useKPort8No switchingPCM/DSDShould beI2SInterface1Feet off，Otherwise, the external signal source may be damaged.！！！

Six、Hardware mute settings（Hardware mute mode is not recommended for the latest version，The latest version of the newly added soft mute function it is recommended to use soft mute effect is better）

MUTE:MUTEIt will play normally when the foot is connected to low level，The high level mute。

MUTEIt can be realized when the foot is connected to the silent output signal of the Italian interfaceDSDThere is no noise when changing music in the mode！（Other devices haven't tested this function yet）

Seven、With Italy interface(Automatic sampling rate andDSDThe latest soft mute connection method for changing music without noise）2019Years10Month24The board purchased before the day has different functions，Please check the specific functions at that timeTransaction snapshot

K5  KPort5No I The Italy interface18Feet

K4  KPort4No I The Italy interface17Feet 

K7  KPort7No I  The Italy interface11Feet

I2SInterface Definition：

1 DSDON ; 2 GND ; 3 DATA/DSDL ; 4 BCK/DCLK ; 5 MCLK ; 6 LRCK/DSDR

Note：Signal does not containDSDONIf the signal is not received，And then runKPort8No configurationDSDOrPCMMode！

Electrical characteristics：

4497 PCBThe size of：10*10cm

Change-over plate size：4.8x4.8cm

4497PlatePower supply：The analog power supplyDCDouble15V（Attention is the DC double15VInput，Incorrect AC or line sequence connection will cause permanent circuit damage！） ，Digital Power supplyACSingle9-12V（Here may be an alternating current！）。

Balance to single-end conversion board power supply from4497PoutOutput！

Because the power supply of this board simulation section is double DC input，So it is necessary to rectifier filter regulated power supply！Users who need it can click the text at the back to transfer the purchase！

As a result of this board isI2S/DSDSignal straight into（Without digital receiving function），Require coaxial、For optical fiber digital reception, you can click the text transmission at the back to purchase！ 

Description：

Panel on the volume control(VOLPort)The potentiometer，But I don't really use a potentiometer to control the volume，But with the single-chip microcomputer read potentiometer intermediate foot of voltage(WithVCCToGNDThe voltage of the percentage)，And then through the Mesnac writeDACInternal register for volume control，So as long as the potentiometer has good contact，The quality of potentiometer will not affect the sound quality。

The main board simulation section adopts the official standard versionLPFCircuit。The following。。。

Other won't go on about it，Want to contact customer service！

Due to the unstable market of electronic components, some components may be out of stock and replaced by other brands, but it is guaranteed that it will not affect your use effect.！Mind don't shoot！

This product does not provide documents such as schematic diagram！Only provides the interface definition（It is written in the introduction or marked on the board）！