Asynchronous I2S FIFO project, an ultimate weapon to fight the jitter

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Joined 2002
Hello Andrea,
If you will end up in a psychiatric hospital will you still be able to share information with and organize group buys for other lunatics.
And will you be able to get your book published about the earth being flat?
There has been some serious activity here for your canonisation so we should hurry!
Greetings, Eduard
P.s You like Ian to live in the same hospital?
 
Got the StationPi Pro PCB samples this week. Started to test and debug.
StationPi Pro has a touch screen controller. This controller can take care of everything. The controller also has a build in FifoPi controller. I think a lot of people are waiting for this feature.
Touch screen size can be 2.4", 2.8" or 3.2". Controller software will be open source so that the GUI and layout can be customized.
When working with ReceiverPi MKII, StationPi is capable of up to five inputs, RPi, OPT, RCA, HDMI and USB. It can be used to set up a very professional streamer/DAC.
StationPi Pro will be in all finished. Mounting screw positions will be compatible with the original StationPi.




Wonderful Ian, waiting for such a screen. Only just bought a normal StationPi :)
Also using the ReceiverPi so dont need switches for that anymore.

Would be nice if can a remote control can be applied as well.. :)
 
StationPi Pro

I built a StationPi Pro based streamer yesterday. I’m really happy with it.

StationPi Pro doesn’t improve sound quality over StationPi DIY. But it extends the functions of a streamer to all the possible ranges as same as a professional network streamer. It can switch inputs between RPi, RCA,OPT,HDMI and USB by just one touch. And it’s also very nice having the FifoPi controller built-in.

Manual switch mode was also reserved. The touch screen can be optional.
I also reserved a COM port to RPi. If there is anybody who is interested in writing a Volumio plug-in to remote control the StatioPi Pro, I would be very happy to provide the communication protocol.

Streamer configurations:
1. StationPi Pro
2. RPi 4
3. Amanero Combo384 USB interface(or compatible)
4. ReceiverPi II
5. ifoPi Q3
6. TransportPi

Power supply
1. LinearPi Dual
2. UcConditioner 5V
3. UcConditioner 3.3V


StationPiProIntegration11
by Ian, on Flickr


StationPiProIntegration22
by Ian, on Flickr


StationPiProRD
by Ian, on Flickr

Ian
 
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Thanks Holco


func main()
var touchPosition;
touch_Set(TOUCH_ENABLE);
com_SetBaud(COM1, 960);
com1_Init(combuf, 100, 0);
gfx_ScreenMode(LANDSCAPE) ;
gfx_Set(BACKGROUND_COLOUR, WHITE);
gfx_Cls();
cfgLoad();
screenRefresh(inputSource);
cfgInitial();
cfgApply();

repeat
touchPosition:=touchScan();
if (touchPosition!=-1 && touchPosition<iconN)
inputSource:=touchPosition;
cfgSave();
screenRefresh(inputSource);
cfgApply();
endif
ch:= serin1();
if (ch != -1)
fifoMessageStateMachine(ch);
endif
forever
 
Ian’s new toys are getting more and more expensive, we have to work harder to get it.

Well, start doing so if you want to keep up with a VERY expensive hobby I would suggest. Or should Ian be communist and work harder so you get it cheaper?

Ian's products are actually VERY friendly priced I must say. Knowing the time and risk he invests in it....

my 2 cents worth
 
@dddac

I'm just telling a joke, you are too serious. :D

I made more than $200,000 usd easy money from the stock market last year.

At the end of last year, the world's second-largest resistor factory had a strike and other incidents, resulting in a 50% reduction in its production capacity, causing other resistor factories to increase their prices, and at the same time, the price of other passive components increased.

Recently Ian's new toys have started production, and the price is a bit more expensive than usual, which is understandable.

However, I estimate that it will recover soon in a few months, and the price will also fall. It is just that the price will not drop too much because the workers are asking for a raise.

Will Ian reflect the cost and lower the price by then? Ian mentioned that the price of the next batch of GB may be reduced because the increase in the price of passive components is only temporary, because the production capacity of the world's second largest resistor factory is only temporarily reduced. After Japan withdrew from passive component production in the past, a substantial reduction in production capacity led to a normal price increase.

Ian is more sensitive to the price of passive components. If Ian invests in stocks, he may be able to make money.
 
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...raspberry 4 sounds better than the rpi3.....

I am still confused on claims like this. The FiFoPi should make this transparent.
my experience is, that I cannot seriously hear any difference between a RP3 and a WaveIO connected to the RP3 USB port with both feeding the FiFoPi

I have not tried to compare with RP4, so no idea "how much better" this would or could be?

imho most things we do are not as "significant" as we would like it to be.

@Ian, did you do some serious comparison between the RP versions with your FiFoPi?
I read once that the earlier RPis had quieter power circuitry than does the latest 4. Ian's isolation PCBs should make this a moot point if it ever was an issue. I've used both RPis (3 and 4) in my end-point builds and really can't tell a difference. However, I do prefer analog PSUs even for the RPi power. I adopted Ian's LinearPis in my latest streamer build.
 
redjr
Greg in Mississippi did some extensive comparisons of the various versions of Rpi vs Rpi2 where he replaced all the voltage regulators. Then concluded that the Allo USbridge was as good as his best modified Rpi. You can find his detailed posts in his listening impressions thread.