Thanks for this very usefull data. Miklos
--- In [email protected], Marco IK1ODO <[EMAIL PROTECTED]> wrote:
>
> At 20.58 01/11/2006, you wrote:
>
>
> >Can one assume that any soundcard advertising 24 bit, 96 or 192 kB
> >sample rate can output supersonic freqs rather than having a 20 kHz
> >low pass filter rolloff on the in's and out's?
> >
> >John
>
> Hello,
>
> a few days ago I posted a message about soundcard tests on SoftRock.
> I think it may be interesting to this group, so please forgive the
> cross-posting. I only tested the A/D sections; I have no info on the
> output (D/A) sections. All tested cards work well in full-duplex, at
> least with one channel in and one channel out.
>
> ----------------------------------------
>
> Recently I performed more tests on different audio boards. Here are my
> results:
>
>
> M-audio Audiophile 192
> Bus: PCI
> Maximum sampling rate: 192kHz
> Useable band: 85kHz (limited by antialiasing filter and image rejection)
> Maximum input signal: 2x 4V RMS, true differential input.
> Dynamic range measured at 10kHz in 2.4kHz band: 123 dB
> Note: noise increases approx. 5dB per 10kHz from 25kHz up. Too much
> noise over 45kHz.
>
>
> Creative Soundblaster USB model SB0490
> Bus: USB 2
> Maximum sampling rate: 96kHz - tested at 48kHz
> Useable band: 24kHz (limited by antialiasing filter)
> Maximum input signal: 1.85V RMS
> Dynamic range measured at 10kHz in 2.4kHz band: 105 dB
> Note: flat noise, not tested at higher sampling rate (will do it later)
>
>
> M-audio Delta 44
> Bus: PCI
> Maximum sampling rate: 96kHz
> Useable band: 44kHz (limited by antialiasing filter)
> Maximum input signal: 4V RMS
> Dynamic range measured at 10kHz in 2.4kHz band: 108 dB
> Note: flat noise, input is not differential (negative input signal is
> routed to ground via R-C)
>
>
> E-MU 1616 (not a 1616M!)
> Bus: CardBus (PCMCIA)
> Maximum sampling rate: 192kHz
> Useable band: 85kHz (limited by antialiasing filter and image rejection)
> Maximum input signal: 2x 4V RMS, true differential input.
> Dynamic range measured at 10kHz in 2.4kHz band: 122 dB
> Note: noise increases sharply over 45kHz, up to a 60dB increase at
> 80kHz. Internal spurious signal at 46.5 kHz
> The 1616 uses a PCM1804 converter, and the behaviour is described in
> the converter data sheet. However it is very good at 96kHz sampling
> rate, and Fin up to 45 kHz.
>
>
> 73 - Marco IK1ODO
>
>
>
> [Non-text portions of this message have been removed]
>
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