Text only | Text with Images

HydrogenAudio

CD-R and Audio Hardware => Audio Hardware => Topic started by: metalman69 on 2012-08-18 03:34:06

Title: Methods or equipment for accurate bit-for-bit SPDIF transfer
Post by: metalman69 on 2012-08-18 03:34:06
I am trying to transfer an audio recording from a DAT recorder digitally to a PC for burning onto a CD or archiving in WAVE format. At the moment, all I have is a SoundBlaster Live card into which I feed the SP/DIF audio data from the DAT unit (via it’s ‘CD Digital’ input).

The problem is that the amplitude of the captured audio apparently can be increased or decreased via the card’s CD Digital recording input level control slider, which is something I do not want. Rather I prefer the capture the digital audio from the DAT exactly as it is on the original tape without any processing (in this case, amplitude). In other words bit-for-bit, or as close to this as possible.

I would greatly appreciate any advice or info as to how I can achieve this, what equipment I need that is not too costly, or what reasonably priced sound card can properly and accurately capture an incoming SP/DIF digital audio signal AS IS without allowing it to be manipulated in any way.

Thank you in advance
Title: Methods or equipment for accurate bit-for-bit SPDIF transfer
Post by: bennetng on 2012-08-18 07:20:49
Your SB Live probably cannot do this because it will resample all input to 48khz (even if the source is already 48khz)
You need to buy another audio interface/soundcard which can [1] set SPDIF master/slave mode and [2] set master clock to 44.1khz and 48khz and preferably [3] support ASIO for wider compatibility of recording software.
Title: Methods or equipment for accurate bit-for-bit SPDIF transfer
Post by: SoNic67 on 2012-08-18 16:42:17
Quote from: metalman69 on
I am trying to transfer an audio recording from a DAT recorder digitally to a PC for burning onto a CD or archiving in WAVE format.

DAT records audio with 48kHz samplerate. SB is fine to capture that.
CD requries 44.1kHz samplerate. You will need a samplerate converter for what you wan to do - Foobar2000 has a good SRC avail, the one based on SOX routines (not the "normal one".
Title: Methods or equipment for accurate bit-for-bit SPDIF transfer
Post by: bennetng on 2012-08-18 17:36:51
The sample rate of DAT can be 32/44.1/48khz
http://en.wikipedia.org/wiki/Digital_audio_tape (http://en.wikipedia.org/wiki/Digital_audio_tape)
http://www.datrecorders.co.uk/dtc57es.php (http://www.datrecorders.co.uk/dtc57es.php)

Another problem is that SB Live cannot record in slave mode. This can cause problem even if the DAT is recorded in 48khz.
Text only | Text with Images