Are USB interfaces that good or is there a some difference in the sound
quality between it and the PCI card delta-44. Is either of them good
enough for almost pro quality vocal recording (assuming you have a
almost pro: studio room, pre-amp and microphone). Anyone have any idea.
Thanks.

"chowdhury" wrote in message


Are USB interfaces that good or is there a some difference in the
sound quality between it and the PCI card delta-44.

Let me illustrate the problem as follows:

A PCI Audiophile 2496 has two analog channels and a digital port that
handles 2 more channels. All interfaces can operate full-duplex. If you do
the math, the total data rate is:

4(channels) times 2(full duplex) time 24 (data bits) times 96000 (samples
per second) =

18,432,000 bits per second.

In the case of the Delta 44 is has four analog channels and no digital
interface. It's aggregate data rate is therefore the same as the PCI
Audiophile 2496.

Any USB 1.1 audio device is limited to an absolute and total maximum of
about 12,000,000 bits per second. From this you must deduct USB device,
interface, framing and protocol overhead, which is substantial.

As they say, do the math!

18,432,000 12,000,000 - overhead

....even if USB overhead were zero. USB overhead is much greater than zero!

Is either of them
good enough for almost pro quality vocal recording (assuming you have
a almost pro: studio room, pre-amp and microphone).

In fact, even far lesser interfaces such as the Creative Labs SoundBlaster
USB MP3, are good enough for *almost* pro quality vocal recording. Just keep
the audio levels going into to it up high enough so that there is no
clipping with the input gain turned all the way down.

In article writes:

Are USB interfaces that good or is there a some difference in the sound
quality between it and the PCI card delta-44.

I'm sure there is, but it's not because of the difference between how
they talk to the computer. Lots of stuff between the audio input and
the computer output, and it all makes a difference.

Is either of them good
enough for almost pro quality vocal recording (assuming you have a
almost pro: studio room, pre-amp and microphone).

Yes.

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