View Full Version : Problem with external sound card

Oct 29, 2012, 11:40 AM
Hey. I have problems with my external sound card (novation, nine 2/4). When I want to record vocals / guitar. When I sing / play do i hear s "metallic" buzzing. I've got a new sound card, but the same problem persists. It is probably a problem with my computer and not the sound card / cable. I have updated the drivers to the latest, uninstalled, installed the older drivers but the problem persists. I've checked the system messages and found some suspicious things (attached image). I have an imac 27 "mid 2011 running 10.8.2 Mountain Lion.http://forum.macworld.se/uploads/monthly_10_2012/post-64188-027096000%201351445701_thumb.png
"2012-okt-28 17:57:50,000 kernel[0]: Kext com.novationmusic.nio.driver not found for unload request.
2012-okt-28 17:30:21,518 com.apple.kextd[12]: Load com.novationmusic.nio.driver failed; removing personalities from kernel.
2012-okt-28 17:30:21,474 com.apple.kextd[12]: Can't load /System/Library/Extensions/NovationNioAudio.kext - no code for running kernel's architecture.
2012-okt-27 18:51:15,746 com.apple.kextd[11]: Can't load NovationNioAudio.kext - ineligible during safe boot.
2012-okt-27 18:51:15,748 com.apple.kextd[11]: Load com.novationmusic.nio.driver failed; removing personalities from kernel.
2012-okt-27 18:56:06,040 com.apple.kextd[11]: Can't load /System/Library/Extensions/NovationNioAudio.kext - ineligible during safe boot."

Oct 29, 2012, 12:09 PM
If you ever get another chance to buy an audio interface make certain that it does NOT require drivers. Interfaces that are "Class Compliant" can use Mac OS' built-in drivers and you will never have to worry about the manufacturer loosing interrest in driver maintenance.

That is the biggest danger, the manufacturer has not financial interest in updating a driver after he has sold the lost of some model of device. So you are stuck.

I don't know that this is the case here but your error messages point that way.

BTW the Novation has interal "effects". I assume some of those are a kind of distortion effect. That is likely the root cause of the sound defect, It is being misapplied because of a software problem. I am surprised the default from power up is not a simple clean interface with no effects applied.

Oct 29, 2012, 12:39 PM
I found an other message in system messages:
2012-okt-29 18:32:55,331 GarageBand[2517]: Audio engine overloaded, resetting

Nov 1, 2012, 12:06 AM
Do you mean Novation Nio 2/4?

Did you uninstall the old drivers before you installed the new drivers. You need to have the newest drivers installed.

Where is the buzzing coming from. iMac speakers, headphones or what.

Nov 2, 2012, 11:11 AM
Yes i ment novation nio 2/4.

How do i uninstall the old drivers correctly?

The noise comes from all exits, imac speakers, external speakers headphones.

Nov 2, 2012, 05:35 PM
what do you have your buffer settings at?

Nov 2, 2012, 06:23 PM
48000,0 Hz 2 channels 24-bit

Nov 4, 2012, 09:24 AM
48000,0 Hz 2 channels 24-bit

that's your freq and bit depth - what about buffer size?

Nov 4, 2012, 03:04 PM
Were do i find the buffer size?