2008 7月-12月 第1項課程召集 - (1) 夏季 DAC 原理和製作班 (10月11日繼續組裝)

Dyna,

I want your Gundam.....

Looking for MG Gundam V2.0 at 26-July

KK.

To,

OK, the first class with teach a little bit skill and technique.

KSir

TDA1541A MK4 featuring: (Great improvement of MK1-3)

1. TI DIR9001 input receiver, native on board.
2. Support External clock to DIR9001
3. LED Lock Status of DIR9001
4. Individual power supply to DIR9001
5. Precision components in DIR9001 PLL circuit.
6. TWIN TDA1541A equipped
7. I/V output socket for LPF tube buffer.
8. 4 X NE5532 Single gate Op-amp
9. Pico-Gate logic gate on board.
10. Output Relay.

What is the MK-V featuring ?

DAC 3: AD1955 Absolute True Balance DAC:

Featuring:
1. Full DALE resistor
2. Large cap pad size for easy upgrade to Black Gate capacitor
3. Absolute true balance config.
4. 2 X AD1955 DAC
5. Full LCD display input status.

Most of the device are SMD base, we can help you soldering if you need.
Due to alot of resisotr, transistor and diode are need to soldering, a careful and mid-advance DIY skill are needed.

Sound quality is a "very details", with a solid and highest channel seperation.

This board can also work on Un-balance mode, you can adding TUBE buffer to tune the sound taste like a tube taste.

DAC 7 TDA1547: DAC No.2

Featuring:
Small form factor size of PCB.
2 SMD device, SAA7350 and SM5842 + TDA1547.
是Clone STUDER的D731的 DAC 7部分circuit
高频部分就采用Mark_Levinson耦合circuit

One chassics include Loader and DAC :

Only 1 solution :

CDM9 / CD-Pro 2 + DAC 7 (TDA1547 DAC)

AD1955 impossible.

TDA1541A, it can, but space is limit. Need to review again.

All of the 3 kinds of DAC have different character.

If I were you, making 3 of all la.

You may say I earn too much.............. NO.

You can join the most difficult / complex of AD1955 first.

After that, you can easy to make 1547 and 1541 at your home.

We can offer KIT to you. (special price only for AD1955 classmate)

Sure, you need to drill some holes (not more than 10) in HF before you take the KIT to home.

KK

Dyna,

Yes, you can do the TDA1547, 1541 at home sure.

For drilling the alum case, you can mark the basic hole and do it at HF when you take the KIT.

I bought MG2.0 at early stage, $265.

KK

Sugar,

OK, have seat.

Please send email to admin@hififever.com to confirm again.

Autumnleafcat,

It should be IIS input module for CD-PRO2 IIS output


OR

IIS output module for normal CD player

KK

滿額, 下回請早....


NEXT ROUND.............NOV ?  OK ?

Dyna,

See you tomorrow.

Admin will send the email to everybody at tonight.

You can trust the USB CODEC as a speaker.

The player is the PC, you need to install the SW which can playback the APE file.

All of the sound information will be pass through to USB codec.

When you plug the USB CODEC into the PC, your sound device (sound card / onboard sound) will be disable.

The USB codec will transform the USB audio steam into IIS signal.

KK

See below:

如果使用I2S连接，那么转盘与解码器的时钟就要一致，这样才能同步.
由于AD1955不支持192fs、384fs等时钟，因此CDPro2与DAC1955PRO不能使用I2S连接，只能使用S/PDIF来连接了。

only support 256fs, 512fs, 768fs

192fs = 192x44100 = 8,467,200

256fs = 256 x 44100 = 11,289,600

384fs = 384 x 44100 = 16,934,000

512fs = 512 x 44100 = 22,579,200

768fs = 768 x 44100 = 33,868,800

11.2896MHz machine check list
http://www.lcaudio.com/index.php?page=39

As my 640C player not on the support list, you mean I need to mod my CD player?

// It cannot solve the problem, if your CDP core frequency is not 11.28896MHz.

and install the USB device which you've shown us yesterday into the 1955 DAC?

// The PCM2706/7 is 256fs. so the IC can solve this issue.

to achieve" 用S/PDIF来连接 >>  转盘与解码器的时钟就要一致，这样才能同步"?
// AD1955 DAC KIT can support SPDIF. If the input is SPDIF format, no need to care the clock frequency in your CDP.

If the answer is yes, that means I need to attaned the CDP mod class later or I better build a HTPC to achieve "转盘与解码器的时钟就要一致"?

// The above ans can let you have your decision.

KK

我想問加個USB codec 容易嗎?

// Easy, soldering 4 wire in, 4 wire out. 2 wire for 9V power. 4 wire for USB input

(同價錢方面....)　

// hope to be below $250.

同已知cdm9同pro2一樣不能使用I2S連接,但我部cdm9應用那方法連接？同支持那個數位fs？(Setting方面可否在課堂上指導指導？）

// SPDIF.

Personally, I think the course is running a bit too fast.

// Yes, agree. I need to pack 3 DAC into a single class, also tell 3 kind of people for the circuit, up-grade. Therefore, I simple introduce 5 major basic block at very beginning which must have it in DAC.
DIR, Digital Filter, DAC, LPF and Output buffer.

I am believe I am teaching their function in the course. But some of the protocol definition such as IIS, Oversampling, filter characteristic is skip.


And the course material is not detailed enough. I just cannot absorb all the materials just seeing your Power Point flashing on the screen. It'd be better if you can do it a bit slower.

// Agree, but only 1 night (if pure 3 hour) is also cannot teach you everything for whole DAC. I can teach you only DIR parts at 3 hour. But believe most of the technical terms is hard to understand. I do this at last DAC course and CD modifcation class let make people sleeping. Also, I need to balance the level inside the class. I don't know all of 15 people in class, so a very simple block teaching is choose.

Would you please email us the notes before the class or delivery the hardcopy to us during the class, and it will make life easier. Thanks.
     
// I will have a single class (special class) at coming week (mon-Fri) nights.
Say 7:30pm-11:00pm only. Which teaching the theory only. And Q&A.
A pure DAC theory class for DAC class people.
, after that, I will cancel the teaching at other coming 3 course.
My original plan is :
Night 1 : Simple introduction, 3 type of DAC circuit analysis.
Day 2 : Function of each 5 block. Detail operation of TDA1541A, 47 DAC
Day 3 : Function of each 5 block (cont). Detail operation of AD1955 DAC
Day 4 : Advance modfication tips.

Please let me know what you want ? Also for the classmate.

sugargar

I'm building 1955 DAC and want to know the price of upgrading to Plan A with OPA797x4, OPA627x4,OPA2604x2, (4.7uf x 4pcs good capacitors around $500), USB module and without all other capacitors.

// The OPA797, OPA627, and OPA2604 will first to reserve for complete plan A and Plan B user.
I am reserve the LEAD type Op-amp for Plan A, B user first. (also for future DAC class).
Please contact admin@hififever.com to get this special quote. I am not sure the result is good.

// Some good capacitors also inside a capacitor, this is what I found in the DIY market.

// USB module is around $250. KIT only.
Please note: I only have 10set on hand now.


KK

Sugargar and all,

Please contact Admin for USB module issue, we reserve by first deposit first serve.

1) 4700-6800uf better use 35v+ (Yes)
2) 2200-4700uf better use 25v+ (Yes)
3) 2200uf better use 25v+ (Yes)

If I use blackgate STD cap on the above slot, the voltage of cap in blackgate STD cap stock list is only 16V, if I use the following STD cap on power filtering slot, 16V voltage enough?  

// SURE NOT ENOUGH. Don't use 16V rating, I will not test it unless you change to the voltage rating of the capacitor to recommended value.

1) 4700uf,16V x 2
2) 3300uf,16v x 3
3) 2200uf,16v x 1

In additon, if I use (Blackgate FK) 100uf,16V x 8 in the PCB slot, is 16V enough?

I want to join the (special class) at coming week (mon-Fri) nights,

// It should not be call special class, I put the coming 3 class early into this day. But I need to get a confirm by remain 14 person (total 15 person in class). If all of the classmate agree to have this arrangement, I am no problem.

I want to buy the digital meter $2xx which you shown us yesterday because my tiny meter seems not work, will pickup at the special class.

// Same as USB module issue. Limited stock at HF office, first deposit first serve.

KK.HO

Sugargar[/quote]

Cat and all,

For the upcoming class, I will use another method of teaching.

Using our white board and label the signal flow.

So, you may need to drop it down.

Time is too tight and hope every body understanding the signal flow. I don't have time to make my powerpoint waveform moving.....

Digital Receiver, Digital filter, DAC will be use white board + power point.

Low pass filter and Output buffer will be use Power point + datasheet + Simulation Software.

Will try to skip all mathmatics due to I don't know everybody background.

KK.

10/9 7:30-8:00pm KK 會在旺角友誠 1/F 大快活等大家來拿其他零件. 大家回家連同新零件組裝, you can order the upgrade parts at that time too.

11/9 7:30-8:00pm XX (Time and person will be announce later) 會在旺角友誠 1/F 大快活等大家來拿其他零件. 大家回家連同新零件組裝

(已改為Office Hour後個別送出, 7:30-8:00不會在旺角友誠等)

// KK will be leave 大快活on time. Please drop down my mobile no. 93067521. Send SMS to me first if you are on the way.
If default 版本學員 have your own components and already soldering on board, you are no need to pick the 其他零件.

15/9 10:00am-12:30pm Default 版本學員 在 HiFi Fever 測試底板
15/9 2:30pm-5:00pm Plan A 版本學員 在 HiFi Fever 測試底板

// Major testing the voltage after first stage of discrete regulator. (8 group of discrete regulator), tunning the +/- 15V output to Analog power supply.
If everything OK, people should soldering back 9 piece of LM1117-5 and LM1117-3.3V LDO. And clean your PCB by supplied liquid.
Suppose : Testing each module : 10 min
Tunning +/- 15V output : 4 min
People soldering back LM1117 X 9 pcs : 30 min.
Check and Clean : 3 min.

Please make sure you are soldering all of components for power supply unit before you come.

20/9 理論, 最後裝箱..
// The decoding section will be test when you finish all of your connection, drilling and finish assemble of your chassics.

Your board will assemble and test by me. Also, I will let you know what need to test at Final assemble class.

The USB module is a KIT solution.
You need to solder the QFP IC. Total 32 pin Square shape monster.

I will call admin tonight to pack the unit to you.

Are you totally default pack or Plan A / B ?

Please let us know.

I can wait you a longer bit, but hope to receive your SMS if you come late.
I think this is no good to sit too longer in a restruant.

Please drop my phone no : 93067521.

Sugar,

I will bring one DMM to you, please prepare the $.

For the USB module, let me collect all reply from classmate and arrange at same time.

KK

No need adding additional power transformer.

Basically, if only 1 IIS in (USB in), you can draw the power from BUS. *USB bus power.

We are adding a logic gate (74HC157D) to do the selector.

When no USB signal (5V), the device will toggle to IIS (RJ45 input)

When USB in (5V detected), the device will swich over to USB output.

Still available, 3 remain stock, first come first serve at 15-Sep.

I've already soldered LM1117-3.3 & LM1117-5 into the PCB already, do I need to remove them before testing on 15/9? If don't remove those parts , can do the testing also?

// If don't remove the LM1117, if any failure at primary regulation section, the over voltage will kill LM1117 then feed into DIR / DAC, all kill and bye bye la.

All,

We have some Plan A and Plan B (not complete, but close) components at hififever.

First come first serve, see you 10:00AM for default, 2:30 for Plan A.

Remember bring Cheque or Money.

No EPS / VISA

Good luck.

a. The 24 pins IC socket for SAA7220 is missing

// Will give u back.

     b. The four Op Amp NE5534 are missing

// Yes, will give you on the test.

     Secondly, I am thinking to add the tube buffer as the output for the TDA1541 MkIII kit. Please advise the pricing for the tube buffer kit.

// You need to change LARGE CASE because you need Tube amp buffer.
Admin will quote you a total price.

autumnleafcat,

Asking the transformer manufacturer last night, the shielding wire is shorted together (start winding short to end winding, one layer winding on top of the body).

Just same as your expected one.

KK.

RTING,

The Digital Filter SM5842 did not support IIS input mode.

If you planning to make high end USB DAC, please wait our web announce later.

It depends on

Need to check the classmate have finish the soldering or not.

Cat and all,

Do anybody not finish yet ?

I can give you more time.... Don't worry.

Looking forward of everyone have well prepare and making a perfect machine.

Don't worry on time and less pressure.

USB module connection diagram and Circuit diagram

1. Assume you will not IIS+External reclock

2. It can support IIS in by other external.

3. Connect (if need) your IIS device to the input of 74HC157D, pin label in PCB.

4. Connect the output of 74HC157D (which follow by 100R at o/p) to the IIS input of your DAC. You can connect the output to the port (near RJ45 port header). Connect them by label shown in PCB.

5. Connect 5V (from DAC board, digital or MCU area) to USB V+.

How to work ?

1. When USB is plug into your PC, the 74HC157D will output the data from USB device.

2. When no USB is plug in, it will output the IIS signal from your input port.

Upgrade hints:
1. The KIT come with OS-CON capacitor, no need to upgrade.
2. If you no need external IIS input, you can no need to solder the 74HC157D, direct output the data to IIS port on your AD1955 DAC. (RJ45 socket)
3. Using TCXO 12MHz instead of crystal. Or, 12MHz SMD oscillator will have a good result.
4. Silver Wire of MCK, DATA, BCK, LRCK will be a good result.

Playback:
I am usign WMP11, any MP3 song, it show 44.1KHz in the LCD panel of AD1955. No need to set in PC.

A) Upgrade hints:
4. Silver Wire of MCK, DATA, BCK, LRCK will be a good result.

// You can compare the result by using IDE cable, Silver cable, and copper cable (LAN cable). Suggest you finish the board early and do this comparision early.

Q: Is it good enough if I use the silver wire (pink colour) attached on the USB module which last time you tested on my PCB board?

// You can consider LAN cable (copper wire) be a power supply cable. The total power consumption is less than 100mA.
No need too thick, pure copper is recommended.

B) Can I use back the USB module which you have assembled and tested on my PCB board last time? because I've used over 2 hours to solder the wire and tailor make the mounding.

// To be fair of another classmate, all of the Diyer should soldering their board by himself.

C) After your recent test:
Playback:
I am usign WMP11, any MP3 song, it show 44.1KHz in the LCD panel of AD1955. No need to set in PC.

Q: Do you think the quality of the MP3 song playback by AD1955 pro better than market $2k sound card?

// If you trust my founding, the performance will not let you disappear.
Suggest you carry your MP3 (put it at USB stick, I don't have CD-ROM). And test it by your ears.

Atleast, the power supply of DAC VS Soundcard. DAC must be better, also, Opamp is better than sounccard la.

Output capacitor test.

It is build in DC-SERVO, basically, it don't need o/p capacitor. Sometime, people would like to use it to tune "the sound taste"

We are prepare the following value for your test, no need soldering.

4.7uF, 10uF, 22uF, 33uF and 47uF.

ELNA GOLD Non-Polar series.

Please prepare some pretty cash at 2-NOV la....

Dyna, Chris, Sugargar,

Got some Japan KDS 12MHz TCXO SMD type for USB module.

It is a Automotive grade device (wide range of temperature operation) and ultra reliable

Please prepare.........

See u.

Chris, Sugargar, Dyna, or other interest USB module friends,

Assemble 4 set.

One is same as Sugargar one, Crystal base (you can use it back)
One is using crystal
Two is using TCXO.

The result is.....................

Too terrible of TCXO VS Crystal.

You can come to listen at 2-Nov. Tell me what you finding about this.

You only install the USB module in chassics, all of the SMD job is done by me. Only 6 wire you are need to soldering on DAC, the wire should not over 4 inch. Safe and Excellent sound quality method.

Except that 3 man, we only have 2 available.

First come first serve.

Dyna,

It is a simple issue. I am assemble 4 set USB already, just plug and play 6 wire, you will compare instantly.

THX

Still in prepare the components.

Will put SRC4192 on daugther board.

DAC progress:

Macau Joe : OK, if you need USB, please let me know early.

Dyna, Chris : OK, USB module OK. You can choose Crystal / TCXO base($)

Angus : OK.

Henry Lam :
PSU : Test OK
AC mains socket broken : Solved. ($)
Dip 8 Opamp IC socket short pin 2,3 --> Solved ($)
Left channel output transistor pad damage --> Solved.
SMD device dry soldering --> Solved.
DAC not working --> In progress, please wait.

USB support mode (With AD1955 IIS input)

CD Source : 2008 AV show Track 5 : What are diff aday made

WAV (16bit / 44.1KHz) RIP by NERO --> Support (32MB size)
WAV (24bit / 44/1KHz) RIP by NERO --> Support  (48MB size)
Apple Loss Less RIP by ITUNE --> Support
MP3 (320kps) Rip by ITUNE --> Support.

You can compare 24BIT WAV file VS CD quality at coming SAT / SUN.

Sugargar, I think this arrangement will let you know Soundcard VS DAC quality.

You can bring your source (I am no CD-ROM drive) !!!


THX, ISF

Sorry, we did not provide the special price about this.

TWO TCXO module reserve, first come first serve. That's all.

DAC 1955 can accept 176.4KHz input MAX.


Even the DIR9001 can only support 96KHz, but I tested today, it can "EAT" 176.4KHz SPDIF digital signal.

Please trust this is a "over spec" mode, we cannot gurantee all of you can do this.

Sure, you can test it by SRC input with your machine to know it can or not.

SRC board + USB --> DAC 1955

Right hand side is USB board

SRC board IIS --> USB board IIS input (74HC157D),
74HC157D --> IIS input of DAC1955.
when no USB connect to PC, the output is from SRC board.
When USB connect to PC, it will output USB-IIS stream to DAC1955.

Final config:

CDM12.1 IIS --> SRC board.


Don't learn about the config, it is too dangerous to put a CDP over a DAC without the top plate.

You can compare CDM12.1 IIS in put VS SPDIF input from SONY CDPX5000 transport.

I would like to use CD-PRO2 IIS out to SRC board, but the classmate not finish yet....

The MCU is reading the sampling rate by 1/2 of MCK signal from DIR9001.

SPDIF input