Allo DigiOne Signature Digital Audio HAT for Your Pi

By on November 28, 2018
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The Allo DigiOne Signature is a networked S/PDIF converter built on top of Raspberry Pi single board computer. The DigiOne HAT add-on directly connects to the Pi’s 40-Pin socket to pull digital audio upwards to output via S/PDIF with reduced amounts of jitter and/or electrical noise.

“The DigiOne by itself sells for US$99. Don’t have a Raspberry Pi? ALLO can sell you a complete player – Pi and DigiOne all wrapped in an acrylic case – for US$175. And if you find the acrylic case too homebrew of appearance, ALLO offer a metal case for an extra US$40. Now we arrive at Roon/UPnP/Squeezebox streamer for US$215 that resolutely spanks a standard Sonos Connect and offers a large dose of the Wyred 4 Sound-modified Connect’s liquidity and ease”

Features of the ALLO DigiOne Signature for Raspberry Pi include :

  • It’s a “re-clocker”. The unit has its own clocks so it does not rely on the jittery RPI clocks
  • It’s galvanically isolated. The clean board is isolated (ground and signals) from the dirty side
  • It needs 2 PSUs, one for 5V/2A-3A (RPI) and a second power 5V to 6V 100mA. We do recommend the cleanest power supply possible (batteries, linear but even a good SMPS will work)
  • Old driver is compatible for both units (chose DigiOne on your favorite player)
  • Measured jitter has decreased further, less than 400fs (tested at buffer)
  • Output is coaxial/BNC and rise/fall time is 1ns and voltage level is exactly as per guidelines (550mV on coaxial) measured at end of transmitting cables
  • Includes 2 x DC to Type C Adapter Cables
  • Includes 1 x DC 5.5 x 2.5 to DC 5.5 x 2.1 Adapter

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