Forum Archive Home -> Audio -> Capture laserdisc audio (s/pdif to PC)
Capture laserdisc audio (s/pdif to PC) | ||||
| digitalfreaknyc posted 2008 Jun 21 12:42 | ||||
| Hello all,
So my onboard audio for my new PC doesn't have a spdif input. Do I have to spring for a new sound card or is there a USB adapter for s/pdif output on the laserdisc player to my computer? I just want to get a bit perfect copy of some concert laserdiscs (2.0, not 5.1) that have never been announced on DVD. Thanks... | ||||
| Nelson37 posted 2008 Jun 29 17:19 | ||||
| Very few cards that can do this. Must be 24-bit, bit-accurate, then run thru be-split.
The Creative X-fi cards can, have craptured several 5.1 files with this. You may, or may not, run into some timeing issues with this. | ||||
| edDV posted 2008 Jun 29 17:37 | ||||
| Later generation Laserdiscs had S/PDIF out but at reduced bit depth/rate than DVD. If this is important I can research the detail. | ||||
| edDV posted 2008 Jun 29 17:41 | ||||
As far as I know, all 2.0 channel Laserdisc has been 16 bit LPCM @48KHz. Maybe some are 44KHz. | ||||
| leonid_makarovsky posted 2009 Oct 12 00:03 | ||||
| > As far as I know, all 2.0 channel Laserdisc has been 16 bit LPCM @48KHz. Maybe some are 44KHz.
No. LaserDiscs are the same format as CDs: 16 bit LPCM @44.1 KHz | ||||
| edDV posted 2009 Oct 12 02:12 | ||||
Red Book CD is 16bit @ 44.1KHz sample rate. That works out to a bit rate of 2 channels x 44,100 samples per second per channel × 16 bits per sample = 1,411.2 kbit/s. http://en.wikipedia.org/wiki/Red_Book_(audio_CD_standard) The PCM tracks on Laserdisc were also 16bit, 44.1KHz sampling. Laserdisc also supported AC-3, DTS and other audio formats. AC-3 supports audio sample-rates up to 48 kHz. DTS can use 48kHz or 96kHz sampling. Laserdisc players did not support 96kHz. http://en.wikipedia.org/wiki/Laserdisc#Audio http://en.wikipedia.org/wiki/Dolby_Digital http://www.audioholics.com/education/surround-sound/dolby-digital ... he-formats | ||||
| leonid_makarovsky posted 2009 Oct 12 10:34 | ||||
Sorry. It was typo. I meant to type 44.1 kHz. I already fixed it in my post. In any case if one wants to capture LPCM digital sound of LaserDisc to CD or DVD, one has to run SPDIF from an LD player to his/her soundcard (assuming soundcard doesn't resample) and record it at 44.1 KHz. I use this trick when I do video capture from LD. Then I would just resample and audio track from 44.1 to 48 KHz and put it on DVD. --Leonid |
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