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Drive NOS AD1865/62,PCM1704/02/63,TDA1541 from FIFO: Universal I2S-PCM driver board
Drive NOS AD1865/62,PCM1704/02/63,TDA1541 from FIFO: Universal I2S-PCM driver board
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Old 12th October 2018, 05:47 AM   #931
Jjazz is offline Jjazz  Europe
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Thanks Ian for the quick response.

I have reviewed the connections several times, and I have changed the connector to the dualxo (J3). I had some problem with this from the beginning, I thought there was no weld UFL connectors, but yesterday I removed them and connected J3 to dualxo, but it does not work either. In dualxo and fifo all leds it's OK.

Best regards.

I will ask you for a new one.
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Old 12th October 2018, 08:22 AM   #932
Jjazz is offline Jjazz  Europe
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Hi, it is sure that my DAC has had an electrical problem and has been damaged not only the I2STOPCM, also the FIFO PCB. I tried separately and both fail, I could not try Dualxo to see if it fails, in principle all LEDs are lit correctly, so far I have already ordered a Fifo board and another I2STOPCM.

Best Regards
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Old 12th October 2018, 08:35 AM   #933
Hanze Khronye is offline Hanze Khronye  Australia
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Default I2S to PCM bit accuracy I/O TDA1541A

Dear Ian,

Is it true that your (my) I2S to PCM board is not best suited 'as is' to TDA1541A ?
Building the ultimate NOS DAC using TDA1541A

Kind regards,
Hanze

Last edited by Hanze Khronye; 12th October 2018 at 08:41 AM.
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Old 5th November 2018, 01:03 AM   #934
iancanada is offline iancanada  Canada
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Drive NOS AD1865/62,PCM1704/02/63,TDA1541 from FIFO: Universal I2S-PCM driver board
Default PCM board works with TDA1541/A perfectlly at simultaneous mode.

Somebody thinks that the timing of PCM board looks different to the timing in datasheet. Yes, it’s true. But it’s not a mistake. Different from other TDA1541/A drivers, PCM board works in synchronized timing mode. It was originally designed in that way trying to eliminate more noise from PCM timing. Both timing in the TDA1541 datasheet and the timing of my PCM board are within the timing restriction. TDA1541/A has no problem working with either of them. But theoretically the timing of PCM board will bring less noise to the TDA1541 DAC.


I did some test again last weekend to double confirm PCM board works with TDA1541/A at simultaneous mode. Here are details of the test:

1. Configurations:

RPi with Volumio as player,
FifoPi with 45/49MHz XOs
Real time music format monitor by an ESS DAC controller
PCM board
TDA1541A DAC
LifePO4 pure power supply

2. Music format for test

44.1KHz 16bit
44.1KHz 32bit
88.2KHz 32bit
192KHz 32bit

3. PCM board jumper settings

JOB: jumped (short)
HALF SPEED: short or open

4. Testing result

All above music formats were tested working with TDA1541A DAC perfectly without any problem. Sound quality was amazing with the battery based power supply included in system. TDA1541A plays at its signature style comparing with other Delta-Sigma DACs. Full speed mode feels a little bit better than half speed, (might be caused by more silence time within PCM timing).

Please keep in mind, for PCM board, input format other than true I2S will cause wrong sound of music. For example, the Sony format, which can be found in many CD players that were made in Japan.



Click the image to open in full size.

PCMboardTDA1541Configuration
by Ian, on Flickr
Attached Images
File Type: jpg PCMboard44.1KHz16bit.jpg (304.8 KB, 247 views)
File Type: jpg PCMboard44.1KHz32bit.jpg (303.6 KB, 234 views)
File Type: jpg PCMboard88.2KHz32bit.jpg (304.5 KB, 234 views)
File Type: jpg PCMboard192KHz32bit.jpg (305.0 KB, 228 views)
File Type: jpg System.jpg (515.5 KB, 80 views)

Last edited by iancanada; 5th November 2018 at 01:07 AM.
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Old 5th November 2018, 08:40 AM   #935
batteryman is offline batteryman  United Kingdom
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Quote:
Originally Posted by iancanada View Post
Somebody thinks that the timing of PCM board looks different to the timing in datasheet. Yes, itís true. But itís not a mistake. Different from other TDA1541/A drivers, PCM board works in synchronized timing mode. It was originally designed in that way trying to eliminate more noise from PCM timing. Both timing in the TDA1541 datasheet and the timing of my PCM board are within the timing restriction. TDA1541/A has no problem working with either of them. But theoretically the timing of PCM board will bring less noise to the TDA1541 DAC.[/FONT][/COLOR]
Hi Ian,

Since it works, its for the doubters to accept this. Anyone else like myself who has had issues have probably been sending it the wrong format of data.

Am I right in thinking when used with your FIFOII board, I can input the other pcm formats? The instructions imply this is possible with jumpers 4 & 5.

I'd really like to use my Denon Professional Rack Mounting CD player as it has a 'quality feel' to the buttons, Sanyo transport and all steel construction.

Any news on my faulty board? (my fault in connecting it to 15v instead of 5v)
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Old 6th November 2018, 06:45 PM   #936
guido is offline guido  Netherlands
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Long time ago i got the TDA1541 working with a PMD-100 digital filter (with additional glue logic) in simultaneous mode. Also outside the timing restrictions shown in the 1541 datasheet. It works.

Don't ask me how it "sounds", never completely finished the project (still on my to-do list, which is long).
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Old 6th November 2018, 10:06 PM   #937
guido is offline guido  Netherlands
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Some timing diagrams from a long time ago.

Click the image to open in full size.

Signals are (top to bottom):
LR and BCI: the input to the PMD100 (modified I2S)
BKO, DOL and WCK: the output of the PMD100 (BKO is a typo, should be BCO).
LE is the pulse made by converting WCK
DG is the de-glitch signal, reclocked it becomes DEM.

Click the image to open in full size.

Picture two shows one frame of BCKO, DOL and WCKO. The LE signal is the one used to latch the TDA1541, it latches on the rising edge.

Click the image to open in full size.

Last one zooms in on LE, DG and DEM.
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Last edited by guido; 6th November 2018 at 10:35 PM.
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Old 6th November 2018, 10:46 PM   #938
guido is offline guido  Netherlands
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Not allowed to edit anymore...

BCKO connects to TDA1541A BCK
DOL connects to TDA1541A DATA L (not shown DOR to DATA R)
WCK (WCKO) is used to create LE for TDA1541A with some glue logic.

Hopefully it makes some sense now and the timing diagrams are usable for comparison.
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