[Woody Bass]

Jeremy,

This is what I thought would be the case, but just wanted to make sure from others who deal with this kind of thing on a regular basis. Just out curiosity, is the way we have it set up currently (audio from IoHD piped to mixing board) the common configuration or is there some other way of doing it that is a better approach?

Thanks for your help,

Woody

[Woody Bass]

Sorry for the delayed reply…needed to get some info from client.

As far as the setup of the suite, we have the audio out of the IoHD feeding into a mixing board, which then feeds the various decks and speakers.

Here’s the response from the client re: the audio sync issue: “f I play a captured or exported by FCP file it plays in sync through both the AJA IO and the Mac internal speaker. If I play a RealMedia file (created by Squeeze) it plays in sync through the internal speaker but out of sync through the AJA IO. Same with video/audio files (Flash, typically) on the web.”

Any ideas on what might be going on here?

Woody Bass

[Woody Bass]

Maybe I’m missing something obvious, but when I install the trial version, it asks for the usual name, organization, and serial number….how do I go about installing it on a trial basis via this dialog?

Woody

[Woody Bass]

Gary, et al.,

Not trying to beat a dead horse here, but can someone clarify why this weird audio “echo, loop” issue only happens when the System audio out is set to use the IoHD?

Maybe I’m just missing something obvious here, but since the audio that’s coming from FCP to the IoHD is also traveling over the Firewire bus, how is it that it can “bypass” this issue? Does FCP interact with the AJA software in a different way than does the Core Audio layer of the OS/Quicktime?

I understand the workaround, i.e. using FCP or the AJA TV to play QT files, but it just seems to be that if you can play audio from within FCP through the IoHD w/o any “echo”, then the same should hold true for any audio traveling over the Firewire bus.

Again, I apologize if I’m asking something that’s obvious to the rest of your more seasoned gurus out there :-).

Woody

[Woody Bass]

I had forgotten about the AJA TV app, but that just might do the trick. All of the codecs in use are standard, so I don’t think using this app will be problematic….I’ll give it a spin tomorrow.

Thanks for all the feedback guys….we’re still relatively new to the game, so some things that are obvious to most of you isn’t that obvious to me :-). Any other feedback re: best practices with the IoHD are more than welcome….

Woody

[Woody Bass]

Thanks for clarifying the issue Gary….I did have the audio out set to use the IoHD in the System Prefs, but switching it back to the internal speakers allows audio from FCP to play fine.

But I’m curious as to how you would configure the system so that clips which typically open in QuickTime Player can play audio through the same speakers. This particular client receives many QT files and want to be able to preview them via these speakers that are routed from the IoHD without having to open them in FCP each time.

I suppose if the speakers have dual inputs, we could route the system-based audio to the 2nd set of inputs, but this doesn’t seem a standard way of configuring an edit suite.

This just seems like a bug in either the IoHD drivers and/or the Mac OS/Quicktime/Firewire and I would think you should be able to send ALL audio through the IoHD without any hiccups?? Am I missing something here??

Woody Bass
wbass@tenplus.com

[Woody Bass]

I apologize if this post shows up twice…I thought I had already posted a reply, but just came back to check the forum and it didn’t show up.

Anyway, we have also encountered this weird audio “echo, looping” with (2) IoHD units, the most recent test being this AM. We have noticed the issue in both FCP and QT Player, and it occurs with a variety of encoded clips. FWIW, the issue only occurs when audio is routed through the IoHD; if audio is played back through either the internal speakers or if we use a Y-splitter to send audio from the audio out to speakers, we do not notice the issue. We have no other Firewire devices attached to the MacBook Pros.

Along those lines, are config is as follows:

MacBook Pros
Mac OS 10.4.11
FCP 6.0.2
AJA IoHD 5.1.1 driver

We have reported the issue to AJA, but have yet to find a resolution….any ideas?

Woody Bass
wbass@tenplus.com

[Woody Bass]

Thanks for the suggestions Jeremy, but neither of the suggestions did the trick. Let me throw out a few other bit of info that might assist in determining a resolution to this issue.

A typical workflow for this client would be to use 720p59.94 source footage, which is imported from a DVC Pro HD deck (via SDI) into FCP. After the usual post work in FCP and AE, the final sequence is output to any or all of DVD, BetaSP, and the above DVC Pro HD decks. We have set up a direct SDI connection to the DVC Pro HD deck, but have had to use the AJA D10CEA SDI to analog converters with the DVD and Beta decks.

We did another test after my initial post and discovered that the audio popping does not occur when we have output routed to the SDI-only DVC Pro HD deck, but only occurs when either the BetaSP or DVD decks are being used.

So from Jeremy’s comments, is it normal to hear audio popping when downconverting from a 720p-based timeline (or any HD timeline, for that matter) to the BetaSP/DVD decks? Is there some setting in the Kona CP that might be set incorrectly? Is it that we’re converting from SDI to analog signals?