Mac OS forum


Sound Trouble: MP3s/Videos silent

by sandsystems / November 27, 2012 7:53 AM PST

I am running 10.6.8 on a 2ghz Intel Core Duo Imac. I am an old OS 9 technician... not quite as saavy with OS X and the kernal/terminal/console, etc.

Yesterday evening, I began to have an unusual problem during an attempt to record some audio (in audio hijack pro). Soundflower was installed as part of that package. When I tried to listen to the resulting AIFF files by opening them in Get Info and hitting the play button, there was no sound. I checked the settings, they were fine, and the output was working (i.e. clicking to speakers/headphones when volume is incremented).

At first I thought something obvious was amiss, so I reset my equipment (I had an Alesis USB mixer attached which I removed), I decided to update the USB mixer and downloaded a firmware update for it from Alesis. When I ran it, I had a kernal panic. I am fairly sure the problem existed prior to this. Also, earlier in the day, there was inexplicable echoing in skype (an abnormal sort which I thought was the other client).

I rebooted, checked my preferences, and tried again. Nothing. I opened Itunes, Mp3 files would appear to play but produce no sound. So, too with videos and recordings in Photo Booth. I rebooted. I re-installed Itunes. Same result.

As I have an older OS (10.4) on an external, I booted to that, and played MP3 files in itunes without trouble (i.e. this is not a hardware issue).

I rebooted from my internal, and the problem persists. It is not a simple matter to re-install the entire system (in fact, it could take days), so I am hoping for another solution, and, perhaps, some help with diagnostics (particularly things I can check in logs or terminal). Any non obvious advice appreciated.

It appears to be a system component corruption problem from what I can gather so far. I get sound on stuff in youtube videos and things like that, just not for local MP3 files, or videos. Other sound functions appear normal.

What I have done: complete re-install of OS X 10.6.2 + all updates.


Uninstall Soundflower

I would greatly appreciate diagnostic help and suggestions other than wipe/blast/remake the system...

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Clarification Request
Further Data
by sandsystems / November 27, 2012 8:39 AM PST

Soundflower was uninstalled.
When I log in as my ghost user (a troubleshooting account) everything is fine. Same OS, same disk, different user.

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This may be a little simplistic, but,
by mrmacfixit Forum moderator / November 27, 2012 8:38 PM PST
In reply to: Further Data

Did you check the Sound Preferences in the System Preferences app?

I have found that installing something to do with Audio, be it as obscure as Skype, will sometimes change the Sound Output preferences so that instead of using the built-in speakers, the Audio output is directed somewhere else.

Take a look


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by sandsystems / December 4, 2012 10:46 AM PST

I did check that and it had no effect. I am on the same machine now with a new user. The problem still exists (and I would like to solve it) for the old account...

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(NT) Did you remove SoundFlower, as previously suggested?
by mrmacfixit Forum moderator / December 4, 2012 8:33 PM PST
In reply to: Reply
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by sandsystems / December 4, 2012 11:05 PM PST

If you read the thread, you will see that I did.

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(NT) Ooops,
by mrmacfixit Forum moderator / December 5, 2012 11:17 AM PST
In reply to: Reply

All Answers

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I got nothing. Well a little.
by R. Proffitt Forum moderator / November 27, 2012 8:29 AM PST
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