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From: Juan I. Cahis on 25 May 2010 10:44
Dear friends:

How to make a recording from a digital source (fiber) using an Intel
2007 MacBook Pro?

I understand that the Sound Input jack has also digital capabilities,
so if I plug a fiber cable in it, with the correct plug, I could make
a recording from a digital source (a DAT tape recorder) directly, am I
wrong?

Do I need to select an special input sound configuration to do it in
that way, or simply I should select "Line In" as the sound source?

Any help will be greatly appreciated, thanks a lot again.


Thanks
Juan I. Cahis
Santiago de Chile (South America)
From: David Empson on 26 May 2010 01:03
JF Mezei <jfmezei.spamnot(a)vaxination.ca> wrote:

> Juan I. Cahis wrote:
>
> > I understand that the Sound Input jack has also digital capabilities,
> > so if I plug a fiber cable in it, with the correct plug, I could make
> > a recording from a digital source (a DAT tape recorder) directly, am I
> > wrong?
>
> I know that it has digital sound output. I am not 100% sure it has
> digital sound input.

All 15" and 17" MacBook Pro models support optical input on their audio
input jack.

All 13" MacBook Pro models have a combined audio in/out jack which
supports optical output but not input.

Combined optical/digital input is also available on the MacBook prior to
the Late 2009 model, iMac models from mid 2006 [MacTracker might have an
error here regarding the original Intel iMac missing this feature], all
Intel Mac Minis, late 2005 PowerBook G4, early 2005 PowerBook G4 17".

The Mac Pro and PowerMac G5 have a dedicated TOSLINK input.

> When you plug it it, it detects the TOS link cable and enables digital
> stuff. When you plug in an analogue sound input device, you can then go
> to the system proeferences and choose the port as an input device. I'll
> have to try with my 2009 Macbook to see if it can take digital sound input.

There are limits on the encoding protocol used for the digital input.

This article <http://support.apple.com/kb/TS2315> mentions that Intel
Macs don't support 32 kHz and 88.2 kHz, but do support PCM at 44.1 kHz,
48 kHz and 96 kHz.

Dolby Digital won't work.

Adusting the input frequency and bits per sample may need to be done
using Audio MIDI Setup (in the Utilities folder). I haven't played with
digital audio input so not sure what options are available.

--
David Empson
dempson(a)actrix.gen.nz
From: Juan I. Cahis on 26 May 2010 22:26
Dear David & friends:

dempson(a)actrix.gen.nz (David Empson) wrote:

>JF Mezei <jfmezei.spamnot(a)vaxination.ca> wrote:
>
>> Juan I. Cahis wrote:
>>
>> > I understand that the Sound Input jack has also digital capabilities,
>> > so if I plug a fiber cable in it, with the correct plug, I could make
>> > a recording from a digital source (a DAT tape recorder) directly, am I
>> > wrong?
>>
>> I know that it has digital sound output. I am not 100% sure it has
>> digital sound input.
>
>All 15" and 17" MacBook Pro models support optical input on their audio
>input jack.
>
>All 13" MacBook Pro models have a combined audio in/out jack which
>supports optical output but not input.
>
>Combined optical/digital input is also available on the MacBook prior to
>the Late 2009 model, iMac models from mid 2006 [MacTracker might have an
>error here regarding the original Intel iMac missing this feature], all
>Intel Mac Minis, late 2005 PowerBook G4, early 2005 PowerBook G4 17".
>
>The Mac Pro and PowerMac G5 have a dedicated TOSLINK input.
>
>> When you plug it it, it detects the TOS link cable and enables digital
>> stuff. When you plug in an analogue sound input device, you can then go
>> to the system proeferences and choose the port as an input device. I'll
>> have to try with my 2009 Macbook to see if it can take digital sound input.
>
>There are limits on the encoding protocol used for the digital input.
>
>This article <http://support.apple.com/kb/TS2315> mentions that Intel
>Macs don't support 32 kHz and 88.2 kHz, but do support PCM at 44.1 kHz,
>48 kHz and 96 kHz.
>
>Dolby Digital won't work.
>
>Adusting the input frequency and bits per sample may need to be done
>using Audio MIDI Setup (in the Utilities folder). I haven't played with
>digital audio input so not sure what options are available.

So, I understand that if I plug an analog cable in the Line-In jack,
the computer will automatically switch to the analog circuits, and if
I plug a digital (fiber) cable in the same Line-In jack, the computer
will automatically switch to the digital circuits, without any
intervention from the computer operator (me), am I wrong?


Thanks
Juan I. Cahis
Santiago de Chile (South America)
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