![]() ![]() Perhaps a simple "plug-in" DAC daughter board could be developed. I do have the feeling though that this project won't supply such a solution. Īt least from my perspective it would be nice to have a simple stack and forget "transparency layer" that cleans up the mess between my PI and my HAT DAC. "Easy" in terms of not fiddling around with numerous other boards, regulators, power supplies, cables. I know that your solutions or better, solutions around your high quality gadgets, are usually all but easy to implement. Usually price/performance ratio is outstanding with these DACs too.īeside that they are very easy to implement. There is huge number of users out there using and loving HAT DACs because of their simplicity. I understand that the main intention behind this project is to provide external I2S DACs Or at least would there be a "plug-in" option for a small DAC chip as used by HifiBerry IQaudio asf. I will be finishing up this project soon.Ĭan other PI HAT DACs be put on top of it? Since I'm working on multi-channel I2S/DSD FIFO PCB, hopefully I can place a bulk order. It will work very well with all RPi DACs and other audio gears by flowing Raspberry Pi HAT design specification. Has isolated I2C control bus for RPi DACs, as well as optional I2C EEPROM ID bus. Raspberry Pi DACs and other audio gears will work with ODROID (may need software support for configuration).ĥ. In this case, all current SD image such as Volumio, MoodeAudio, RuneAudio, and most others, will have native DSD play-back features.Ĥ. But if distance is within USB reach and I do not need tens of hi-rez channels exceeding USB highspeed capacity, the advantage of AoIP is beyond my understanding. Ethernet being a perfect medium for that, unlike USB, SPDIF etc. The daughter board will convert DoP stream back into native DSD stream bit-perfect at real-time. That's exactly where many channels and support for large distances are needed. Supports native DSD playback by plugging in an optional DSD decoder daughter board. To isolate ground and all other signals between RPi/ODROID and audio system.ģ. So I came up with a new idea: An I2S/DSD isolator HAT with optional native DSD decoder for Raspberry Pi and ODROID.ġ. The only issue is that none of the RPi audio gears will work with ODROID because of that I2S port. It has a dedicated I2S port (which is incompatible with PRi). I bought a C1+ because a friend of mine recommended. However that's not the way I use a PRi.Īnd the third thing is the ODROID. It means the native DSD feature works only with a USB streamer for now. But after downloading the software, I was very disappointed to find that the native DSD is only supported over USB interface. I’ve heard that the latest version of MPD already has native DSD support. But I’m still worried about sharing noisy PC ground with audio system.Īnother thing is that I'm very interested in playing native DSD music through Raspberry Pi. Community members and I were very happy with it. I designed a Raspberry Pi I2S adapter a couple of month ago and shared many PCBs for free with this DIY community. That is the main thing I wanted to show in the schematic above, the 5Vs being filtered by a PI filter, and a distinct break between input and output over 3 barriers.IsolatorPi,something cool for Raspberry Pi/ODROID: I2S/DSD isolator with DoP decoder You cannot guarantee that the host device has good clean power especially if it is a PC as these are often built down to a cost, so treating this line as a possible source of noise is paramount. Again, think of your 5V USB supply from a PC, this is the most likely candidate to have noise present. Again this gives the best shielding and return paths for all the signals and further minimises noise problems as the capacitive coupling between the power and the ground is minimised. my surprise was the Wisd device, it removed all noise, as if it was a toslink optical device and at around 40 priced, for 3 dongle, usb < usb, usb C< usb, usb c. ![]() I would have the bottom layer for ground and ground planes only and would route the power on the top layer as tracks. My DAC's USB cable is 5m long, pluged on my pc's USB 3.0 back port, the IFI does half the job removing most of digital noise, but still a lil wind blowing noise at high level at 70. The main coupling method for this high frequency noise is capacitive (this is one of the areas that many forget when laying out PCBs, capacitive coupling of high frequency noise) so having a clean plane under a noisy plane negates the split. Any noise from a computer or other source that the USB comes from is going to be mainly high frequency. Yes that is critical to noise suppression. ![]()
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