Switching Core Audio Drivers - No Audio Out
I have a project in Logic Pro 8. It was recorded with Presonus Core Audio drivers on a Powerbook. The Project was then handed off to me to complete here in the studio.
I re-opened the Logic Express Project in Logic Pro 8 using Digidesign HD hardware and Digidesign's Digidesign HW (HD) Core audio driver. All was well.
We decided to try some changes in routing, using some new equipment M-Audio (ProFire Lightbridge) to take advantage of some Apogee I/O units in the studio. Loaded up the M-Audio Core Audio Drivers (ProFire Lightbridge Multichannel), made sure everything appeared properly in the Apple AMS (Audio Midi Setup) panel and did test tracks in Logic. All was well still
Then I opened the Project, which had been working in Logic 8 and interfacing with the Digi HD hardware, now using the Lightbridge Multichannel driver to access the Apogee I/O, and...no audio.
No indication of activity on the hardware interfaces. I checked Logic 8, onscreen everything appeared normal. Channel meter activity. Channel routing remained unchanged and should have appeared at the appropriate D/A convertor. Digital activity which would have normally been indicated at the ADAT to Firewire interface was non-existent. So, I would deduce that the computer was not directing the Logic channel activity through the new driver to the firewire interface from this project.
I rechecked the test project with tones. I/O activity normal. Audio out. I opened another of the series of sessions from Logic Express to Logic using DAE now using the M-Audio interface. Nada. No firewire/ADAT activity?
I have reverted without problem back to using the DAE/Digi Core Audio model with no problems, but I would like to get the ADAT/Core Audio model running on these same projects as a proof-of-concept, and see no reason why it shouldn't.
Opinions, suggestions, ideas, questions?
...JB
Message was edited by: J A Bohrer
When I was on the phone with M-Audio Tech Support (they're quite helpful) we noted the following:
1. If you switch over to Core Audio using the Mac's Internal speaker in one of these projects (switch to Apple's internal Core Audio Driver). All Channels are immediately updated to show only Output 1-2 available. and the project plays through channels 1-2 and the MacPro Speaker.
2. Switching back to DAE Core Audio, all available channels are updated and all plays/records normally using the Digidesign HW (HD) Core Audio Driver.
3. When the ProFire Lightbridge Core Audio Driver is selected, all channels are updated (now 1-18) and available, but if you select a channel or channel pair on one of the Channel Strips that was not in use previously in this session, an "out" bus for that channel is not created in Logic (which it normally does, assuming you choose a new channel pair for output from a channel strip...)
When a 'new' project is created with the Lightbridge setup selected as the Core Audio output, all channels will auto create an appropriate channel output strip.
My problem only exists when opening a previously created project. (In this case using DAE Core Audio...and I'm not implicating that as the cause, I don't think it is.)
It's like having previous sessions/projects, buying new hardware to improve your ability to work with them only to find out you can't use your new stuff with the old sessions. (Not like that hasn't happened before.)
Either Logic is at fault, not being able to accomodate the driver change from DAE to M-Audio, or the M-Audio driver is, being unable to get Logic to update its Environment to accomodate the new channel availability.
...J
Message was edited by: J A Bohrer
Message was edited by: J A Bohrer
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This information has come from Durin, Adobe staffer:
Hi everyone,
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Monitoring: listening to existing audio while simultaneously recording new audio.
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http://www.griffintechnology.com/products/imic
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Thank you for visiting Apple Support Communities.
I would start with resetting the System Management Controller. Here is the article on how to process these steps.
Intel-based Macs: Resetting the System Management Controller (SMC)
http://support.apple.com/kb/ht3964
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how to fix my speaker in macbook pro i dont what happend before its okie i have also speaker in and out after i out the internal speaker cannot hear even i adjust alrady my seetings.plz help big tnx
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Speakers work but cannot get any sound output. Running windows 7 on Intel iMac. Speakers sound on booting and graphics in Control panel and on toolbar indicate sound is being recieved but nothing comes out of speakers or headphones.
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The Release notes for the Sun App. Server 8, update 1 features several broken links (including that to the Bug Feedback form) The links are contained here: http://docs.sun.com/source/817-7422/releasenotes.html#wp1024635 The broken links are: http://j