Finally an add-on hat with S/PDIF outputs! This type of DAC has been highly asked by customers ever since QA has the Dual ES9023 DAC hat put up in inventory. Popularised by the DigiOne series from Allo, S/PDIF hats on RPI have been considerably looked at by users who have majority of the files at 192kHz and below as well as being ideal for those who use streaming as the primary source. These forms of usage fit well within the sampling rate limit for S/PDIF while allowing users to use external DAC of their choice.
At the core of the components are the Texas Instruments PCM9211 216kHz and Cirrus Logic CS8422 192kHz S/PDIF transceiver chips for the I/O of S/PDIF and SiTime crystal oscillators in reclocking of S/PDIF. While may S/PDIF hats on the market out there support only S/PDIF outputs from I2S, this hat major unique selling point is the ability to convert between the various S/PDIF (coaxial or Toslink) and I2S connections!
The common scenario will be to use the I2S in directly from RPI and outputs to S/PDIF, be it coaxial or Toslink. The I2S output in HDMI jack also can be tapped as I2S out to another DAC if one fancies.
Now the incredible part of this hat is that although it sits directly on top of the RPI, it can work independently by itself. By getting the power from the GPIO pins only to get the hat powered, one can work with it by, say, connecting a S/PDIF coaxial input from a CD transport, and gets I2S output from the HDMI jack or another S/PDIF Toslink output! This hat is effectively working as a S/PDIF to I2S converter.
Inputting external I2S signals is also possible through the side pins as long as the pin outs for the I2S connections are correct. This also applies in using the I2S out through HDMI, that the pinouts should map accordingly to one’s respective DAC’s I2S pins.
Ease of controlling the various I/O is made through the 3 buttons below the tiny but perfectly legible OLED screen. The possibility and versatility of this hat not being used just on the RPI itself is a highly valuable performing addition to many hifi users who love tinkering.
Powering of the hat and Pi can be done directly through the DC input on the hat, where higher quality of power, with for example an LPS and good quality DC connector like the Oyaide, will greatly enhanced both the hat and the Pi. We highly recommend to use together with our Raspberry Pi Power Conditioning Filter Add-on Hat for an even more outstanding and cleaner power to improve further on the dynamics and transparency! With that power filter hat, just a connection to that hat will power up this I2S S/PDIF add-on hat as well as the Pi!
This I2S S/PDIF add-on DAC hat is recommended to be used on RPI 4B models.
Available as a standalone hat with acrylic covers if you already have a Pi board yourself and know how to implement it.
Also available as a complete streamer package with Raspberry Pi 4B fully setup with Volumio installed and ready. You just need to subsequently add the music files to stream and play yourself.
Standalone hat contents: $68
- 1x I2S S/PDIF Add-on hat
- 1x acrylic case with screws
Complete Streamer Package contents (additional 2-3 days): $358
- 1x Raspberry Pi 4B 4G board (8G +S$45)
- 1x I2S S/PDIF Add-on hat
- 1x acrylic covers with screws
- 1x Raspberry Pi Power Conditioning Filter Add-on Hat
- 1x 5V 3A SG/UK type power adapter
- 1x 32GB SanDisk Ultra Micro SD card with Volumio installed
Comes with 1 year QA warranty.