Re: [ARSCLIST] DAT frequency problem

[Marcos Sueiro <mls2137@xxxxxxxxxxxx>]

Tommy,

Some A/D converters have a sample rate converter built-in. My Metric 
Halo Firewire box does have an optional one, for example, and to my ears 
it sounds very good (although I have never tried to convert internally 
from wildly different sample rates).

So, check in your converter for a feature called "asynchronous sample 
rate converter" or "SRC".

Below is the quote from the Metric Halo manual.

INTEGRATED SRC
Normally, when working with digital audio transport, you must take care 
to ensure that all devices communicating with one another are 
synchronized to the same audio clock. While this is still an important 
consideration with Mobile I/O, the hardware provides a special feature 
to simplify copper-based digital connections to the box. The digital 
input on Mobile I/O has an optional asynchronous sample rate converter 
(SRC) that will automatically match the sample rate of the incoming 
audio to the sample rate of the Mobile I/O.(...)

Hope this helps,

Marcos

Tommy Sjöberg wrote:
> Hello all,
> thought I'd check the collected wisdom of the list for a problem I 
> thought I knew how to handle, but didn't.
>
> In our archive we've received a number of DAT cassettes from a freelance 
> journalist. He's used borrowed DAT machines to make reports, but his own 
> cassettes, and this has led to reports recorded with both 44.1 kHz and 
> 48 kHz sampling frequency on the same cassette.
>
> So, fine, I can record them back into the computer and check the machine 
> all the time, and switch between two files to record into, when the 
> frequency changes. I have to create two files, one with each sampling 
> frequency (I'm using Audition) before I start.
>
> I guess I can also set the computer hardware to use the clock on the 
> DAT, but is there a way that I can set the software to change frequency 
> also? I would like to just turn the machine on and let it run, if possible.
>
> Thanks,
> Tommy
>
> ===
> Tommy Sjöberg
> The Center for Swedish Folk Music and Jazz Research
> Stockholm, Sweden
> www.visarkiv.se

--
Marcos Sueiro Bal
Audio/Moving Image Project Archivist
Preservation Division
Columbia University Libraries