Asynchronous I2S FIFO project, an ultimate weapon to fight the jitter - Page 289 - diyAudio
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Old 13th July 2013, 12:18 AM   #2881
palmito is offline palmito  United States
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I had a working FIFO and 2x clock board (stock clocks), powered by the FIFO. I put together the isolator and the battery management board and removed the two regulators from the 2x clock board. Now I get no sound out of the device.

I removed the FIFO assembly and tested the dac board straight to the usb board and I get sound, so it's not the usb or dac boards. I removed the isolator and battery management boards and replaced the 2x clock board for the Si570 and single clock boards and still get no sound.

The battery management board I checked and it works fine when turning the control 5vdc on/off, it either feeds the battery output or shuts it off. When it shuts off the charger feeds the battery. Is there any way of testing the FIFO board itself for correct operation? The isolator board? It seems I've damaged the FIFO board?

I've attached photos of the isolator, 2xclock and battery manager. FIFO with Si570 hooked up and music streaming but not "playing" (i.e., no sound). The isolator has nothing soldered to the bottom side.

Thanks in advance for any help!
Attached Images
File Type: jpg 2xclock.jpg (188.6 KB, 427 views)
File Type: jpg battery_mngr.jpg (157.3 KB, 425 views)
File Type: jpg fifo.jpg (221.1 KB, 321 views)
File Type: jpg isolator.jpg (151.7 KB, 317 views)
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Old 13th July 2013, 02:10 AM   #2882
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Quote:
Originally Posted by palmito View Post
I had a working FIFO and 2x clock board (stock clocks), powered by the FIFO. I put together the isolator and the battery management board and removed the two regulators from the 2x clock board. Now I get no sound out of the device.

I removed the FIFO assembly and tested the dac board straight to the usb board and I get sound, so it's not the usb or dac boards. I removed the isolator and battery management boards and replaced the 2x clock board for the Si570 and single clock boards and still get no sound.

The battery management board I checked and it works fine when turning the control 5vdc on/off, it either feeds the battery output or shuts it off. When it shuts off the charger feeds the battery. Is there any way of testing the FIFO board itself for correct operation? The isolator board? It seems I've damaged the FIFO board?

I've attached photos of the isolator, 2xclock and battery manager. FIFO with Si570 hooked up and music streaming but not "playing" (i.e., no sound). The isolator has nothing soldered to the bottom side.

Thanks in advance for any help!
Hi Palmito,

Please check three LED indicators on the FIFO board,

1. If all LED are off, that means the problem is from the the isolaror board or clock board.

2. If Empty LED is on, it means input I2S signal has problem

3. If Lock LED is on, that means FIFO works fine, you should get sound.

If you are in case 1, try to run the system without isolaor to see if it is working(do not power clock board from DC input for this configuration)

Good luck,

Ian
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Old 13th July 2013, 02:20 AM   #2883
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Quote:
Originally Posted by iancanada View Post
Hi Palmito,

Please check three LED indicators on the FIFO board,

1. If all LED are off, that means the problem is from the the isolaror board or clock board.

2. If Empty LED is on, it means input I2S signal has problem

3. If Lock LED is on, that means FIFO works fine, you should get sound.

If you are in case 1, try to run the system without isolaor to see if it is working(do not power clock board from DC input for this configuration)

Good luck,

Ian
I noticed you have already removed the regs from the clock board, in this case, you can't power the clock board from FFC/FPC calbe from FIFO, 5V may damage the clock board.

If you want to run the system without isolator board, you and use single clock board to play 44.1K music.

After you address the problem, you can go ahead what ever you want.

Ian
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Old 13th July 2013, 02:29 AM   #2884
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Quote:
Originally Posted by palmito View Post
I had a working FIFO and 2x clock board (stock clocks), powered by the FIFO. I put together the isolator and the battery management board and removed the two regulators from the 2x clock board. Now I get no sound out of the device.

I removed the FIFO assembly and tested the dac board straight to the usb board and I get sound, so it's not the usb or dac boards. I removed the isolator and battery management boards and replaced the 2x clock board for the Si570 and single clock boards and still get no sound.

The battery management board I checked and it works fine when turning the control 5vdc on/off, it either feeds the battery output or shuts it off. When it shuts off the charger feeds the battery. Is there any way of testing the FIFO board itself for correct operation? The isolator board? It seems I've damaged the FIFO board?

I've attached photos of the isolator, 2xclock and battery manager. FIFO with Si570 hooked up and music streaming but not "playing" (i.e., no sound). The isolator has nothing soldered to the bottom side.

Thanks in advance for any help!
Both FIFO and clock boards are fully tested. So I suspect the isolator board is the criminal .

You should have the schematic, most probably is the resistor packs, try to find if there is any short or disconnect under the chip.

Ian
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Old 13th July 2013, 05:18 AM   #2885
qusp is offline qusp  Australia
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I suggest a load testing procedure for the battery board + isolator board be added to the manual; before connecting fifo (500Ω-1KΩ power resistor or something). this will give time to eliminate it as a suspect before adding the fifo into the mix.
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Old 13th July 2013, 11:02 AM   #2886
josoeff is offline josoeff  Germany
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Quote:
Originally Posted by iancanada View Post
Hi Joseff,

FIFO is a bit-perfect system, if you have something changed on volume, it should be a system problem. I suggest you checking the signals from DSP to see if it is standard I2S.

To address this issue, you can try FIFO in SPDIF in, SPDIF out mode (SPDIF FIFO configuration), if the volume keeps as same as input without low volume problem on your DAC, that means the problem is the signals from DSP.

Another thing I want to mention is that, FIFO improves sound quality by better clock. I don't know what XO you are using right now. FIFO will be meaningless if you don't have a really nice low jitter clock and good power supply for it.

Please let me know your result.

Regrds,

Ian
Hi Ian,

I configured the FIFO in SPDIF in, SPDIF out mode as you suggested. It works very well, the sound is perfect and the sound level is normal. I have checked the connection to the servo again but there is nothing wrong. So there is anything wrong in the circuit around the servo.

Many thanks to you!

Regards, Josoeff
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Old 13th July 2013, 03:23 PM   #2887
palmito is offline palmito  United States
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Quote:
Originally Posted by iancanada View Post
f you want to run the system without isolator board, you and use single clock board to play 44.1K music.
I set it up with the 1xclock, which I have never used with the isolator/battery manager, so it shuold not be damaged. Fed it 44.1 music. I tried both with the long cables and the u.fl cables in case I mistakenly broke one of the long cable connectors pulling things out. No sound from either set of cables.

Attached is a photo, the only led lighted on the FIFO board is the power one.

Quote:
Originally Posted by qusp View Post
I suggest a load testing procedure for the battery board + isolator board be added to the manual; before connecting fifo (500Ω-1KΩ power resistor or something). this will give time to eliminate it as a suspect before adding the fifo into the mix.
That's a great idea qusp. It would help out us less knowledgeable folks to do "unit testing" before deploying...

I'll put myself down for *two* FIFO boards for the next group buy, I hope there is one...
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Old 13th July 2013, 05:37 PM   #2888
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Quote:
Originally Posted by palmito View Post
I set it up with the 1xclock, which I have never used with the isolator/battery manager, so it shuold not be damaged. Fed it 44.1 music. I tried both with the long cables and the u.fl cables in case I mistakenly broke one of the long cable connectors pulling things out. No sound from either set of cables.

Attached is a photo, the only led lighted on the FIFO board is the power one.



That's a great idea qusp. It would help out us less knowledgeable folks to do "unit testing" before deploying...

I'll put myself down for *two* FIFO boards for the next group buy, I hope there is one...
Hi palmito,

I saw the XO is at wrong position from the picture of your single configuration.

Please see the fifo picture with sinale xo below for details:

Ian asynchronous I2S and S/PDIF FIFO KIT group buy

Please note pin1 of XO has to face the 45 degree corner of the xo footprint.

I believe you can fix it.

Ian
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Old 14th July 2013, 08:29 AM   #2889
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I've done some extensive comparisons between the si and dual xo with crystek 957 22/24 mhz boards using the spidf/aes board as output.

The si570 board cannot be used to output 176/192 khz on spdif in my case since itll run 45/49 mhz on its lowest group setting, so when using the si570 I downsample those to 88.2/96 khz in software (doesnt seem to have much if any negative impact on sound).

I have a preference for not using the isolator board with both clock boards, it sounds better to me without, its advantage may be nullified by the spdif board being powered from the fifo board.

I'm using Sjostrom superregulators to power waveio/fifo with fully seperated clc powersupplies. The powersupply has a very large impact on the sound, quite surprised by how much for basically a D/D converter! I have tried nichicon muse, panasonic fc, mundorf ag, elna silmic 2, they all sound quite different, also interesting that clc sounds better then c before the sjostrom superreg (cleaner/more LF impact), even copper or silver wiring in the powersupply is audible, I can offer no explanation for this, I've gone back and forth numerous times over several weeks and have had friends over to make sure I was not imagining things..

The dual crystek setup sounds significantly better in my system. Cleaner, clearer, more/finer detailed, better soundstaging, tighter more powerfull lows/more impact. The Si570 has some midrange sweetness that may be appealing to some. Its been powered with the supplied 3,3v reg though in all cases with a sjostrom prereg when using the isolator board (only have 5/6V sjostrom superregs available).

Now FWIW because for a totally fair comparison I should power the si570 with a sjostrom 3.3v supperreg which I havent tried yet. Oh I'm fully aware the si570 was developed for 90/98 mhz duties so again this comparison is only valid for 22/24MHz duties.

A final note, the fifo improves the sound from the waveio quite considerably, even when feeding a hypex dlcp which resamples/reclocks everything again anyway, good stuff!!
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Old 14th July 2013, 03:54 PM   #2890
palmito is offline palmito  United States
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Quote:
Originally Posted by iancanada View Post
I saw the XO is at wrong position from the picture of your single configuration.
Thanks again Ian. I placed it correclty now. I never used the 1xclock board until now to test the system after it stopped playing and I don't remember ever pulling the XO out (but good memory is not a trait I have). I did pull the XO's out of the 2xclock board when removing the regulators, but I placed those back correctly.

But it didn't help, I still get no sound and only the power led on in the FIFO board.

Back to waiting for the next group buy...
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