iMac works at 44.1kHz not 48

I am running a DAT machine directly into my 2010 iMac through a coaxial to optical convertor. I have a signal when I play a 44.1 DAT and set audio midi to 44.1 and preferrences to internal input. They both automatically see that it is a digital signal and I can see the audio coming in on the audio monitor directly from the Mac and my software. When I keep everything the same, put in a 48k tape, switch the audio midi and software to 48k, there is no signal. The DAT does say it is output at 48k. I've been going in circles all day with this. Any help would be SO apprecitated.

iMac, Mac OS X (10.6.3)

Posted on May 23, 2011 4:53 PM

18 replies

Pancenter

Level 6

14,788 points

Jun 2, 2011 10:12 PM in response to Julia12341234

Julia12341234 wrote:

That makes sense. Would the hardware issue affect a SPDIF to USB converter? (I do use an Apogee One with USB for Mic input at 48K with no problem). -- Meanwhile I'll mess with the grounding to see if that affects it.

The s/pdif <-> USB type converter would have the circuitry outside of the laptop so yes, I think they would have less noise.

Since the Apogee input is analog, if noise is present, it just gets recorded.

Has your DAT machine ever synced at 48k with any external digital device?

pancenter-

Jun 3, 2011 6:34 AM in response to Pancenter

I've gone directly out of the main DAT's digital output into another DAT's digital input and it works and sounds fine at 48k through the other deck. ---I just messed with the ground and it didn't help.

Pancenter

Level 6

14,788 points

Jun 3, 2011 2:28 PM in response to Julia12341234

Julia12341234 wrote:

I've gone directly out of the main DAT's digital output into another DAT's digital input and it works and sounds fine at 48k through the other deck. ---I just messed with the ground and it didn't help.

The ground thing was a real shot in the dark,

I just have to think the newer (cheap) audio devices in the recent Macs aren't up to the task or the optical-s/pdif converter is not capable... even though it's supposed to be.

pancenter-

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iMac works at 44.1kHz not 48