Re: [Alsa-user] A soundcard to record IEC958_SUBFRAME from MiniDisc

[chris hermansen]

Mark and list,

On Aug 25, 2017 04:17, "Mark Hills"  wrote:

On Mon, 21 Aug 2017, Clemens Ladisch via Alsa-user wrote:

> Mark Hills wrote:
> > a soundcard that has toslink input, and supports IEC958_SUBFRAME_*
> > sample formats
>
> In practice, PCI cards with a CMI8738/CMI8768 (not CMI878x) chip.

Many thanks for this; I acquired a PCI CMI8768 and this morning wrote a
program which successfully extracted the raw S/PDIF stream.

For interest, I've successfully decoded the PCM audio from the stream. But
thinking it may be impossible to form track markers from the rest of the
data. Unlike a CD player, the source (a Pioneer MiniDisc machine) appears
to output digital silence even when not playing, and so far I can't seem
to see anything useful in the metadata.

Thanks again


Is there anything useful at

https://wiki.physik.fu-berlin.de/linux-minidisc/doku.php?id=start

Regards,

Chris Hermansen
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Re: [Alsa-user] A soundcard to record IEC958_SUBFRAME from MiniDisc

[Mark Hills]

On Mon, 21 Aug 2017, Clemens Ladisch via Alsa-user wrote:

> Mark Hills wrote:
> > a soundcard that has toslink input, and supports IEC958_SUBFRAME_*
> > sample formats
> 
> In practice, PCI cards with a CMI8738/CMI8768 (not CMI878x) chip.

Many thanks for this; I acquired a PCI CMI8768 and this morning wrote a 
program which successfully extracted the raw S/PDIF stream.

For interest, I've successfully decoded the PCM audio from the stream. But 
thinking it may be impossible to form track markers from the rest of the 
data. Unlike a CD player, the source (a Pioneer MiniDisc machine) appears 
to output digital silence even when not playing, and so far I can't seem 
to see anything useful in the metadata.

Thanks again

-- 
Mark

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Re: [Alsa-user] A soundcard to record IEC958_SUBFRAME from MiniDisc

[Clemens Ladisch via Alsa-user]

Mark Hills wrote:
> a soundcard that has toslink input, and supports IEC958_SUBFRAME_*
> sample formats

In practice, PCI cards with a CMI8738/CMI8768 (not CMI878x) chip.


Regards,
Clemens

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[Alsa-user] A soundcard to record IEC958_SUBFRAME from MiniDisc

[Mark Hills]

I have a large number of personal MiniDisc recordings which I want to 
preserve as FLAC format.

Losing track markers would be a huge inconvenience, so I can't use an 
analogue recording.

After a recommendation, my attack plan is:

* Acquire a soundcard that has toslink input, and supports 
  IEC958_SUBFRAME_* sample formats

* Write some software to record, starting a new .wav file each time the 
  track number in the SPDIF advances

Can anyone recommend a soundcard I can buy that fits the requirements?

It shows up in only a few places in the code; hda, cmipci, au88x0, atiixp, 
and I don't have enough knowledge to know what products these correspond 
to.

I don't mind if it's USB, PCI or PCI-Express or any form factor -- since 
this is just a one-off job.

I'm time short; I'm really looking for the 'easiest' solution to my 
overall problem. So if anything already exists, whatever platform, I'd 
love to hear it.

I even considered NetMD on Windows to get to the files, and some kind of 
ffmpeg to decode them. But apparently NetMD devices can't be used to copy 
from the discs, only to them.

The hardware is Pioneer MJ-D707 MiniDisc recorder which has Toslink 
optical digital output.

Thanks

-- 
Mark

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