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Software News   Software News : Terratec Phase22 supported
   posted by DaveAE on 5-Nov-2005 12:25:31 (5191 reads)
The Terratec Phase 22 audio card is now supported by the Envy24HT 5.5 AHI driver, which will soon find its way to OS4depot. The Phase22 has both analogue and digital stereo in and out, as well as MIDI in and out. The analogue connectors are balanced quarter-inch jacks, making it easy to connect to a mixing desk. See this link for more information about this card.

Kind regards,

Davy Wentzler

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Re: Terratec Phase22 supported
Posted on 6-Nov-2005 14:29:37
#21 ]
Elite Member
Joined: 22-Aug-2003
Posts: 5888
From: Work


But it's still only roughly 17 bits worth of signal (technically, it's equivalent to 16.7 bits measured with a sinusoidal signal at full peak). One questions the practical value of having 7 (point 3) bits of noise. Oh well, it's a bigger number(TM), so of course it's going to sound better.

If people made a perfect 16 bit converter that would honestly be good enough (98.08dB with sinus at full peak). The problem is of course that 16 bit converters are usually only good for about 13 bits (~80dB). Etc etc. The world wants to be deceived, I guess...

I broadcast, customers are complaining if a 10 bit video converter doesn't get more than 60dB SNR.

Given that an SDI signal only utilizes 840 of the 1024 values in the 10 bit signal (the rest are control codes, giving a penalty of -0.09dB) and that video usually can be considered a random signal uniformly distributed between 0 and 0.7V (with blanking level at -0.3V) then the theoretical maximum SNR of an SDI converter would be 60.11 dB. When has ANYONE here EVER reached a theoretical maximum?

This weeks pet peeve:
Using "voltage" instead of "potential", which leads to inventing new words like "amperage" instead of "current" (I, measured in A) or possible "charge" (amperehours, Ah or Coulomb, C). Sometimes I don't even know what people mean.

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Re: Terratec Phase22 supported
Posted on 6-Nov-2005 14:31:31
#22 ]
Cult Member
Joined: 10-Mar-2003
Posts: 877
From: Glasgow

You never cease to amaze, Davy!

Well done again, sir.

A1XE G4, OS4.1. Peg1 G3, MOS 1.4.
Abel Soul - Check out our tunes on Spotify

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Re: Terratec Phase22 supported
Posted on 6-Nov-2005 23:32:35
#23 ]
Elite Member
Joined: 8-Mar-2003
Posts: 3206
From: Sydney (of course)

That spec sheet is rather thin.

What does "balanced" input and output mean in this context? What input impedance? What common-mode rejection? At 20 kHz?

Do I have to shield the card in a metal can to achieve those noise figures?


Hyperion Support Forum:

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