@hirscwi I am not sure but it looks to me that FifoPi with RPi is somewhat universal and can output I2S specified for different DACs and the configuration is in the software (like in Volumio settings) 🙂
Check the settings provided by @zoom777 in his previous post. Select Target big depth = 32 (this should represent 64fs), but try Target sample rate give less, like 96 kHz. It can start play music after correct configuration 😊
Check the settings provided by @zoom777 in his previous post. Select Target big depth = 32 (this should represent 64fs), but try Target sample rate give less, like 96 kHz. It can start play music after correct configuration 😊
Best in the socket from the DAC and OPAMPs and follow the schematic 🙂
DAC: pin 9 or 12 = GND, and voltages are pins 2, 4, 8, 16
OPAMP: pin 3 = GND, voltages are pins 4, 7
I think this transformer will work perfectly with the @Michelag for 6DJ8 tube IV but want to make sure before I order it.
AS-05T160 - 50VA 160V
The secondaries are 160V or 140V 0.15A with 2 x 6.3v 2A
I ordered the recommended transformer from Aliexpress, but they sent the wrong one.
AS-05T160 - 50VA 160V
The secondaries are 160V or 140V 0.15A with 2 x 6.3v 2A
I ordered the recommended transformer from Aliexpress, but they sent the wrong one.
Thank you.
No magic smoke and voltages are fine!!!
Can't believe it. My previous venture into DAC building, albeit years ago, did not go well (Subbu DAC).
Now I am a step closer to completion.
Yes, I suspect you are correct but I have yet to completely understand it. The FifoPi Ma works in master mode (as opposed to sync mode) and I don't fully understand the differences.
BUT, I had a suggestion from member Gizmo3 to add a plug-in to Volumio. It is the Fusion DSP plug-in. The settings used "convolution filters" "disabled effects" and sampling rate of 176,400 ++. It works like a charm but I don't know why. I'll try to learn more from Ian Canada...
Thanks for the continued support. I'm now working with the folded cascode CEN IV as the I/V converter. So far I really like this DAC - will try the AD1865 next...
Weird ! It sounded fine, I had two. One for reference and one I gave the mods here cause it was a little lifeless for my tastes, but that Vref asks the best as te ppower supply and decoupling choice ! My first smd project. A good chip that this ESS9023 ! The only difficulty was it is smd but nothing on the suregery side though, no harder than the shift registers in the ad1862 V1.3 board here !
You certainly learnt more than you think with it whatever the final result.
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There are what appear to be some reasonable alternatives but that call is well above my training and education.
Murata Pulse Transformers
Regards,
Dan
@dantwomey You can use any of them what you posted. The only difference is in the center-tap option - which is not used in design (pins are left open on the PCB) ... 78613/3C is fine 😊
One dac chip shows -.06V dc offset at the output. Moved them around, swapped opamps. No jls connected.
False alarm. Opamp weren't pushed deep into the socket. One dc is 0, another Channel +0.001 now
Wait. I using another recommended config:
Is there a difference between them?
