Just to clarify, this plugs into a computer USB port and outpouts upto 8 channels of SPDIF digital audio. So yes, it replaces a HD621 with the exception that the U-DIO8 doesn't have a Meridian Comms link or MMHR/Smartlink outputs(obviously) and instead of the audio being output from the computer (or media player) over HDMI, with the MiniDsp U-IDO8 the output from the computer is over USB. Obviously the U-DIO8 has no HDMI input and therefore does not have any HDMI switching or pass through capability. The UDIO-8 also allows upto 8 channels of digital audio input (for recording).

The U-DIO8 allows one to play a DVD/Bluray on a computer and the multichannel surround sound audio to be routed to Meridian Processors via the MD1 or MD2 inputs.

Hope that makes sense?

Ali.

Last edited by Alikris; 2019-02-22 13:40.
Meridian G61R, Behringer A500 amps & DEQ2496 DSP, MiniDSP U-DIO8 audio interface, B&W DM2 Mk2 Speakers (3 pairs), Sony CD, Sony DAT(x3), Alesis Hard Disk Recorder, Sony APR5003 Reel to Reel Recorder. Akai AT93 Tuner & GX-95 MK2 Cassette Deck, Technics SL-1200 Turntable, Valve Phono stage, Denon DL-110 cartridge.

Ambisonic user since the 1980's