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Asynchronous I2S FIFO project, an ultimate weapon to fight the jitter
Asynchronous I2S FIFO project, an ultimate weapon to fight the jitter
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Old 19th September 2020, 04:03 AM   #5581
iancanada is offline iancanada  Canada
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Asynchronous I2S FIFO project, an ultimate weapon to fight the jitter
Default FifoPi Q3 - HDMI - Topping D90

FifoPi Q3 has an isolated DSD_EN signal. So I confirmed there is no problem working with Topping D90 or other exteranl DACs that need this DSD_EN signal to switch between PCM and DSD.

Both HdmiPi and TransportPi can be used for this application through a HDMI cable. A small two pin cable is also needed to connect the DSD_EN signal from FifoPi.

The only issue is that D90 has click noise when change between DSD and PCM. Just hope they can fix this issue by upgrade the FW.

Good weekend.
Ian
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File Type: jpg FifoPiQ3_PCM_D90.jpg (776.0 KB, 328 views)
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Old 19th September 2020, 08:17 AM   #5582
ilgavro is offline ilgavro
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Great job! I have a question. I use 9038pro by diyinhk, can i use the dsd en? Or i Need some mcu in i2c?
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Old 19th September 2020, 05:45 PM   #5583
Joseph K is offline Joseph K  Hungary
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Quote:
Originally Posted by Hanze Khronye View Post
MX037/14D, MX037/14 ?

MX037/8P looks better.
Good point.. But why not go even further.. Their MXOC series is more of the classic, MTI260 style classic timing reference oscillator..
Bigger and heavier, and consumes more than the miniature versions. Also better parameters..

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Old 19th September 2020, 05:55 PM   #5584
Joseph K is offline Joseph K  Hungary
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In this category there is strong competition, so it could be that cost less than the small, low consumption flagship technology versions..
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Old 19th September 2020, 06:02 PM   #5585
Joseph K is offline Joseph K  Hungary
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Doh.. There never is nothing new under the sun..
Here they brought up the same.
Then why did it stop there..!?

IanCanada's Latest RPi GB Goodies Impressions... and your tweaks, mods and hints...
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Old 19th September 2020, 08:21 PM   #5586
A123 is offline A123  United States
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Quote:
Originally Posted by Joseph K View Post
I was one of those who mentioned it. I had been looking at it ~2years ago..
Just for curiosity. Yes, these are identical.

Also the phase noise parameters are equal to those cited for Pulsar..
I think the Pulsar project really was a group buy adventure.. But for some reason did not hold..

Ciao, George
Good stuff.

I'm allocating this year as my learning curve for Q3 / Accusilicon.

If all goes well, I estimate beginning of Summer 2021 I may start hunting for these clocks. Maybe earlier, but conservative estimate. Will follow a GB if one shows up.

I'm looking to build the most optimal small footprint battery power transportable Music streamer possible for personal use. Don't think that goal can be obtained without these clocks.
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Old 19th September 2020, 08:42 PM   #5587
A123 is offline A123  United States
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Quote:
Originally Posted by Hanze Khronye View Post
MX037/14D, MX037/14 ?

MX037/8P looks better.
Thanks for sharing. Saves me from having to contact about obtaining more plots. I cannot believe these alternatives are available.

Please share which product you would consider most optimal with the Q3? The one closest to plug and play. I just assumed the consensus was the 14D?

I might contact Russia next month and try to get info on pricing, payment, shipping, etc..

Last edited by A123; 19th September 2020 at 08:50 PM.
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Old 20th September 2020, 04:55 AM   #5588
Hanze Khronye is offline Hanze Khronye  Australia
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Quote:
Originally Posted by Joseph K View Post
Good point.. ]
Actually I mistook 1Hz for 0.1Hz, 14D looks better to me and could be the sweet-spot in their lineup for power consumption, size and phase noise.

@ A123, yes 14D. Of interest is that initial samples measured better than what became end Pulsar product (I refer to 9x.xxxx MHz). I did also find reference to Pulsar using selected 'low phase noise' OCXO from MagicXtal. The single sample which I have suggests this may be true (which runs counter to the discrepancy mentioned previously), and I'm sure there's a back-story there, and quite possibly an intermediary as well, reading between lines makes picture clearer but also introduces risk of error :-)

Regardless, a shame that Pulsar is no longer making these available in QTY 1+ to end user.

HK

Last edited by Hanze Khronye; 20th September 2020 at 05:24 AM.
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Old 20th September 2020, 06:58 AM   #5589
CallMeMike is offline CallMeMike  United Kingdom
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Quote:
Originally Posted by carlmart View Post
Can someone tell me where the discussion over the Mezzanino power supply board might be on the thread? Around which page?

I made a search but got nowhere.

Have a look here: Mezzanine Power board for Raspberry Pi
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Old 20th September 2020, 09:43 AM   #5590
Joseph K is offline Joseph K  Hungary
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Quote:
Originally Posted by Hanze Khronye View Post
Actually I mistook 1Hz for 0.1Hz, 14D looks better to me and could be the sweet-spot in their lineup for power consumption, size and phase noise.

HK
Yes, I do understand what You say..
Though would take that "sweet" rather 'bitter-sweet'..
The MXOCI line has 10dB lower phase noise at 1; 10Hz..
Not small difference. Actually, with 1Hz /-120dB, 10Hz /-145dB , at 10MHz, it starts to be tough competition..
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