Alternativshik

Hello!!

A new problem has grow up for me and i'll try to ask some well-known people 'bot it, ( ye, I mean YOU, right here).

I use DIGITAL Mix Console and use its SPDIF Out ( Digital Out ).
In specification i find thats stream of it 24bit 96khz constantly and dont depends on type of connection.

I use SB Live 5.1( old souncard) and connect my console throught SPDIf.
My Recording software - Samplitude 7.22 and Driver - kxProject.
In Samplitute i can choose 24bit 96khz as method of recording.
QUESTION : IT Is Real 24/96 WAV after recording? i mean my input digital signal re-processing while it going throught spdif-iternal circuits-hard disc????
24/96 -> 24/96 or 24/96 -> 16/48 -> 24/96 ??

Why i need to use professional souncards ($1500 or hi) if i need only transfer my digital signal from mix console? How can prof. cards can help me with that if signal already DIGITAL??

So, its true what i can record my 24/96 through SPDIF of SBLIVE5.1.

P.s. spdif is working, i mean i can rec and hear, but cannot identify 29/96 or no.

JoshuaChang

no～it's impossible,but if u use 24/48 for spdif output,u can find that it could send perfect 16/48 signal(under 16/48 spdif mode,the signal has been destoryed by emu10kx)

__________________

Alternativshik

I dont understand why 24/96 converts (if its true) to 16/48 ....

WHY???

I try to connect to other card ( realtec based ) - and nothings happened!!
It cannot se 24/96 stream.

But SBlive see it, play it..... Can i find any software to determ type of input signal on spdif/cdin (digital) ?

Alternativshik

<H3>Direct Recording Guide</H3><H4>Introduction

The 10k1 and 10k2-based audio cards support SPDIF digital inputs and outputs. It is widely known that the 10k1 and 10k2 chips operate at a fixed sampling rate, 48000 Hz. So, in order to synchronize internal clocks with SPDIF In signals, the input stream is resampled to 48000 frequency (regardless of its original frequency). Moreover, if the input stream frequency is already 48000, it is still resampled in order to avoid possible synchronization issues. That is why it is theoretically impossible to record SPDIF input bit-to-bit (make an 'exact' copy of the digital signal). The problem cannot be fixed for 10k1-based boards, however, the 10k2 chip (used in Audigy and Audigy2 series of cards) has a special feature - Direct SPDIF recording.

Detailed description

The 'Direct SPDIF Recording' is activated via kX Mixer (on the main page). Due to the nature of this recording method, the signal completely bypasses the DSP, which is why it is not affected by any uploaded effects or by the kX Mixer sliders and recording levels. After enabling 'Direct SPDIF Recording' no other recording sources are unavailable.
It is possible to choose which SPDIF input to record: Coaxial/Optical SPDIF, CD SPDIF etc. In the present implementation it is possible to record analog I2S sources (Line2/Mic2, AUX2) in 'direct' mode, too. This feature is currently being tested since this aspect of hardware functionality has not been clearly defined.
Note that SPDIF inputs can transmit the signal at any sampling rate (44100, 48000, 96000 etc...), so, it is up to user to choose the correct sampling rate in his/her audio applica<H4><H3>Direct Recording Guide</H3><H4>Introduction

The 10k1 and 10k2-based audio cards support SPDIF digital inputs and outputs. It is widely known that the 10k1 and 10k2 chips operate at a fixed sampling rate, 48000 Hz. So, in order to synchronize internal clocks with SPDIF In signals, the input stream is resampled to 48000 frequency (regardless of its original frequency). Moreover, if the input stream frequency is already 48000, it is still resampled in order to avoid possible synchronization issues. That is why it is theoretically impossible to record SPDIF input bit-to-bit (make an 'exact' copy of the digital signal). The problem cannot be fixed for 10k1-based boards, however, the 10k2 chip (used in Audigy and Audigy2 series of cards) has a special feature - Direct SPDIF recording.

Detailed description

The 'Direct SPDIF Recording' is activated via kX Mixer (on the main page). Due to the nature of this recording method, the signal completely bypasses the DSP, which is why it is not affected by any uploaded effects or by the kX Mixer sliders and recording levels. After enabling 'Direct SPDIF Recording' no other recording sources are unavailable.
It is possible to choose which SPDIF input to record: Coaxial/Optical SPDIF, CD SPDIF etc. In the present implementation it is possible to record analog I2S sources (Line2/Mic2, AUX2) in 'direct' mode, too. This feature is currently being tested since this aspect of hardware functionality has not been clearly defined.
Note that SPDIF inputs can transmit the signal at any sampling rate (44100, 48000, 96000 etc...), so, it is up to user to choose the correct sampling rate in his/her audio application. The kX driver won't try to autodetect the sampling rate. The sampling rate is, however, limited by the actual hardware capabilities. It should be possible to record at 96000 frequency on practically every 10k2-based board (such as Audigy1 and Audigy2). Also note that it might require up to 10 seconds for the SPDIF Input to synchronize to the incoming signal, if its sampling rate is more than 48000. If the signal is distorted or audio is muted, try unplugging and re-plugging the SPDIF cable.

Conclusion

Direct SPDIF recording drammatically improves the recording quality of digital sources when the main goal is to make an 'exact' copy of the digital signal. The improvements include better frequency response and intermodulation. In the present implementation Direct SPDIF Recording is not supported for ASIO



</H4>tion. The kX driver won't try to autodetect the sampling rate. The sampling rate is, however, limited by the actual hardware capabilities. It should be possible to record at 96000 frequency on practically every 10k2-based board (such as Audigy1 and Audigy2). Also note that it might require up to 10 seconds for the SPDIF Input to synchronize to the incoming signal, if its sampling rate is more than 48000. If the signal is distorted or audio is muted, try unplugging and re-plugging the SPDIF cable.

Conclusion

Direct SPDIF recording drammatically improves the recording quality of digital sources when the main goal is to make an 'exact' copy of the digital signal. The improvements include better frequency response and intermodulation. In the present implementation Direct SPDIF Recording is not supported for ASIO

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