Can't lock onto a 48k SPDIF (Toslink) digital input

I'm using a 'StarTech AA2SPDIF' A-to-D converter which has a fixed 48k sample rate. If I set the Mac's Digital Input to 48k it will work for a few seconds, then fall back to 44.1k. When this happens, the audio slows down and sounds much like a 45rpm record played back at 33rpm: i.e. the audio playback becomes slow and distorted. Normally I'd assume the A-D converter is bad, but other equipment I have is able to lock on to the 48k sample rate audio with no problem. The A-D also has a coax output and I tried that by running the signal through a coax-to-optical converter and then to the Mac. The results were the same. No problem returning the A-D and ordering another one, but as I said earlier, this one seems OK when run with other equipment. A web search found several others with the same problem (though different A-D's) with their Mac's. Unfortunately, no one found a solution. Any ideas?

I don't know about locking RAM, but strongly suggest that you contact Apple Service, iMac Service or Apple's Express Lane. Do note that if you have AppleCare's protection plan and you're within 50 miles (80 KM) of an Apple repair station, you're eligible for onsite repair since yours is a desktop machine. That might also apply to a new machine within it's first 90 days of use.

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Metadata - Can you lock Metadata to prevent changes

Using Aperture can I lock IPTC fields so that once I input the data and export images...other people can not change my metadata? (Other then in the original file stored within Aperture) For example I would like to lock my contact info and copyright fields when I export the images and email them around etc....
When I open my jpg or any file in Bridge I can change all IPTC Metadata. Can I prevent these changes?
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Message was edited by: Keith254

No, there's no way to do that. Once you've exported a JPEG or TIFF file, any image editor can change IPTC information -- there is no DRM equivalent in the file format to "watermark" this info in there.

Can't change sample rate for digital input on Mac Pro

Hello all,
on my Mac Pro with 10.4.10 I can't change the sample rate for the digital input. Whenever I choose 48000 or 96000 Hz it returns to 44100 Hz after a few seconds. Feeding a 24 bit/96000 Hz signal from an external ADC into the optical input doesn't help. No input signal is available for digital recording software such as Sound Studio or Cubase. After changing the sample rate in audio midi configuration to 96000 Hz the sound can be heard for a few seconds but when the setup returns to 44100 automatically the signal is, of course, lost.
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Hi,
when E&M signaling is configured on digital interface like the VWIC is, 2 or 4 wires operation is not applicable because there are no wires at all, and reported only for compatibility with the analog E&M card.
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Can you lock the SPDIF IN of the MBP to an external SPDIF clock?

I've read a lot of inconclusive posts about this. Can it be done?
The corollary question of course is: can the SPDIF OUT of the MBP sync to a clock at the SPDIF input?
Can both input and output lock to an external SPDIF clock?
TIA

Qzxptl wrote:
OK: once more into the breach... BTW, I really appreciate the followups Pancenter.
Heh... sorry if I misunderstood any of this.
This is the setup:
- The RME Digiface is synced to another device via ADAT Optical sync; it's set up as a slave to that sync signal.
- The Digiface SPDIF Optical (not ADAT: it IS set to SPDIF) out to MBP optical In.
- The Macbook Pro Optical out to Digiface SPDIF Optical In.
But now you have two different clock INPUTS into the Digiface, in fact you are looping the clock signal back in. Even though you have the RME Digiface set to ADAT sync input you are still receivng clock input at s/pdif. You can't have Two Inputs receiving digital clock as there is only ONE clock per device. This setup will not work as "a device receiving digital IN must lock to external that incoming clock." (unless of course there's separate wordclock for all devices)
This sounds similar to the infamous MIDI Y cable I invented in 1985, the one that didn't work!
Unplug the s/pdif out of the Macbook into the RME.
Of course the Digiface settles down, right?
- I can get audio into the MBP this way, no problem.
- I can get audio out of the MBP this way, no problem.
HOWEVER: the SPDIF sync on the DIGIFACE preferences keeps switching between "Sync" and "Lock" every 20 seconds or so indicating that the signal is not perfectly locked to the Digiface clock.
The Digiface clock is nonexistent as it's clock is running off of ADAT clock, whatever that external device is. There is not a separate s/pdif clock output on the Digiface... it's the ADAT clock.
pancenter-

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Many thanks to all who take the time to read through my post.
Kind regards -
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<!doctype html>




<html class="">

<head>
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<link href="css/boilerplate.css" rel="stylesheet" type="text/css">
<link href="css/fluid.css" rel="stylesheet" type="text/css">
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<script src="js/respond.min.js">
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<p>Combined with optimal use of human resources, big is no longer impregnable to ensure that non-operating cash outflows are assessed. An important ingredient of business process reengineering the vitality of conceptual synergies is of supreme importance the new golden rule gives enormous power to those individuals and units. Exploitation of core competencies as an essential enabler, through the adoption of a proactive stance, the astute manager can adopt a position at the vanguard.</p>
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@charset "utf-8";
/* Simple fluid media
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img, object, embed, video {
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/* IE 6 does not support max-width so default to width 100% */
.ie6 img {
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    dw-num-cols-mobile:        5;
    dw-num-cols-tablet:        8;
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/* Mobile Layout: 480px and below. */
.gridContainer {
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#Footer a {color: #ffb400; }
#Content2 {
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/* Tablet Layout: 481px to 768px. Inherits styles from: Mobile Layout. */
@media only screen and (min-width: 481px) {
.gridContainer {
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    padding-right: 0.5681%;
#Header {
    clear: both;
    float: left;
    margin-left: 0;
    width: 100%;
#Menu {
    clear: both;
    float: left;
    margin-left: 0;
    width: 100%;
    display: block;
#Content1 {
    clear: both;
    float: left;
    margin-left: 0;
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    display: block;
#Footer {
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    width: 100%;
    display: block;
#Content2 {
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    width: 49.4252%;
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#Menu {
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#Footer {
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    width: 100%;
    display: block;
#Content2 {
    clear: none;
    float: left;
    margin-left: 2%;
    width: 48%;
    display: block;
It just seems like IE7 is locking onto the very first section of the css and not moving to the desktop and I just haven't been able to solve this so any assistance would be greatly appreciated.
Thanks,
Verne

I have been doing a lot of looking around for possible solutions to this IE 7 issue with media queries. While there were a lot of diverse views on the subject I came across an article that seemed to be an easier solution to try than everything else. I downloaded the js file they recommended, copied and pasted


into my document and now IE 7 shows the web page just like FF, IE9, and Chrome does. It was a super easy fix, even for a novice.
I hope this helps someone else like it has helped me.
Thanks,
Verne
Message was edited by: in-idaho

Can we lock 80 MHz timebase to PXI_CLK10 on PXI-6220 M Series DAQ?

I am using PXI-6220 to measure Frequency/Period of 32768 Hz clock signal, accuracy is very important. I have provided signal to measure on Gate input of Ctr 0 (PFI 9). I am using 80 Mhz Timebase. I want to Lock PLL to PXI back plane 10 MHz reference (PXI_CLK10) which in turn is locked onto the 10 MHz reference via PXI-5600 on Slot 2 (External 10 Mhz standard is connected). so far I don't see a way to lock PLL to PXI_CLK10. Is that possible at all? see the image attached to this message.
Attachments:
M Series DAQ Question.png ‏62 KB

Hello Abhatti,
Based on the diagram that you have attached, the M-Series card can PLL to a higher accuracy clock such as the PXI Clock_10. The way to configure this change using the DAQmx driver is route the signals using the DAQmx Timing RefClk.Src Timing property node. Once you place down this property node, and specify the RefClk.Src attribute, you select the PXI-Clk10 as your reference clock source. This will discipline the 80 MHz Timebase of the DAQ card to the 10 MHz reference clock of the PXI chassis. Which chassis are you using? Also, how have you PLL'ed the 10 MHz backplane clock to the PXI-5600 Downconverter?
Michael L.
Applications Engineer
National Instruments

Firefox connects to google-analytics for some sites, and then gets stuck, and I can never get onto the site. How do I prevent Firefox from connecting to google-analytics? I use XP with service pak 3 in English

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== a couple months ago

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Apps and Music are not from iCloud. Are from iTunes and App Store.
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Hi Kate, have you perchance enabled restrictions on your device. (Settings > General > Restrictions)

Can't lock onto a 48k SPDIF (Toslink) digital input

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