10.4.10 vers 1.1 | Loud noise and Hum on speakers thru' USB Audio Interface

After doing this update all of a sudden my Mbox2 produces loud noise and Hum on my attached speaker when hooking up the power adapter to my MbookPro or adding a second display... I can virtually hear when the computer is computing thru' the speakers... This noise thing adds up the more equipment I hook up...
Does anyone know what this could be....???

This can happen if the software is "allowing"
more power to be accessed by the USB ports..
This isn't quite accurate. USB devices can ask for power, up to 2.5 watts (500 ma @ 5 volts), from a USB port. Software can query the device for its power requirements & shut down the power to it (& warn you it is doing so) if it exceeds that limit. However, the hardware in Macs themselves (& essentially all other computers) also have a number of power limiting circuits, independent of the OS software, that make it just about impossible for the software to "allow" more power than this to be drawn from the port. (If they didn't, they would not meet most of the world's safety codes.)
Moreover, if your USB speakers (or any other USB device) requires more than 2.5 watts, it would never have been bus powered under any version of the OS, assuming it meets USB standards (IOW, displays an official USB logo & is not itself defective).
If the technician is telling you something different, it might be a good idea to find a more qualified one, or at least get a second opinion.

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Hi there,
I got an issue with strong noises (kind of distortion) while playing all kind of music/sounds ( itunes/Reason/Cubase) via an external USB audio device (Yamaha MW12 mixer).
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Message was edited by: d-trich

Hi,
just one addon.
+ Changed USB ports on MacBook and it was fine on the second used.
+ Nevertheless, noise remains on the originaly used port
+ all other connected devices as mouse and midi interface are fully functional on both ports
It still looks like a driver issue. Nevertheless, could it be a hardware issue with the USB port in my MacBook then? Even if all other tried devices are functional?
cheers, Mat

Loud noises and other peoples conversations buttin...

I am posting this on behalf of a friend who is unable to cope with this situation by herself.
Has anyone in Sherborne, Dorset encountered this type of problem? The noises manifest themselves as loud, high pitched screeching sounds. Not unlike the sound of a fax connection - but it is not the same. It is impossible to conduct a conversation whilst this is happening. It is not in every call but most of them.
Also, every so often conversations between other people can be heard. These people cannot hear my friends conversation however.
I have talked to BT on her behalf and they admitted they could hear the said noises but after checking said there was no fault showing. They also had me doing the standard stuff of checking the socket by the diagrams in the telephone book. The noise was still present when her phone was connected to the master socket. The next action seemed to be to order an engineer to check it out. They then read out what was a standard statement, the end result of which was that if they could not find a fault my friend would be charged £99.00 plus vat. She is not able to pay this at this time as was too scared to go ahead with this suggestion.
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When you say it's still present connected to the master socket, do you mean the test socket (the one behind the faceplate)? If so it's unlikely to be an internal wiring problem so there would be no charge. Before arranging for an engineer though, it might be an idea to rule out a fault with the phone itself by trying another one.
You can click the white star next to this message if you think it was helpful.

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This question was solved.
View Solution.

Without hearing the sound it is hard to judge but it does not sound like a hard drive from your description. Hard drive noise is usually a rhythmic "click" not a sustained "whirr". That kind of noise comes from a cooling fan. We can test the hard drive in the BIOS. Tap F2 as you power up to enter UEFI diagnostics and look for the hard drive test. If you do not have UEFI diagnostics (i.e. your laptop came with Windows 7 not Windows 8) then tap F10 and look for a hard drive diagnostic in the old-school BIOS interface.
The Envy 17 series tends to run hot and cooling fan issues are not uncommon. Sometimes it can be fixed by self-help such as blowing out the fan with compressed air. If it is the fan, the replacement fan is not too expensive but labor might run $80-150 for replacing the fan. Post back with any questions.
If you are going to post back please give us your full model number found on the bottom of the laptop or in the battery bay.

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t

Hello Tim
Your posting is pretty confusing and I can not understand what you have done and wrote about all those sound drivers. In my opinion you should make clean Dynadock installation and configuration.
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Sounds like you'll need to access that drive while it is not booted. You need to replace it anyway, so do that, then one way or another (ext enclusure, et), access it and copy files.
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Message was edited by: jlseattle74

Hi my late 2008 model Mac Book Pro has gotten really slow and has made a loud noise twice in the last month.

My Macbook is not acting right it has gotten very sluggish online and has made a really loud buzz or screaching sound twice in the last month. The first time I was just on the internet and it wouldn't quit making the loud noise until I turned it off and back on. This last time it made it while restarting it or was in the process of restarting from updating and while it was still a black screen it made that noise but stoped on its own this time. I have no idea what to check in Macs or where to looks for errors or problems. If someone could please direct me in what I can check to see if there is any info on what may be problemactic on my computer. Thank you. Laurie

Thank you ds store for replying. Not to sound ignorant but I am when it comes time to this...how do I upgrade to 10.6? I also think I have all the ram installed I can on it. This is what system profiler shows in memory.
Memory Slots:
ECC:          Disabled
BANK 0/DIMM0:
Size:          2 GB
Type:          DDR3
Speed:          1067 MHz
Status:          OK
Manufacturer:          0x80CE
Part Number:          0x4D34373142353637334448312D4346382020
Serial Number:          0x83B0A0D8
BANK 0/DIMM1:
Size:          2 GB
Type:          DDR3
Speed:          1067 MHz
Status:          OK
Manufacturer:          0x80CE
Part Number:          0x4D34373142353637334448312D4346382020
Serial Number:          0x83B0A0E0
Also the link you profided is this what the update to 10.6 will provide? I really didn't understand the tech language so I didn't understand what it was telling me. I am sorry to be so inept on this. I just had to have the battery replaced about a month ago and while in the store I was asking the tech to check all the error messages and make sure everything was OK because I had no clue what they meant or if I had any problems. I just use it I guess you would say. The tech said I didn't need to worry about any of that stuff that Mac's don't get viruses and I was fine. Well that didn't answer checking for hardware problems or anything like that but he didn't have anything else to say about it.

10.4.10 vers 1.1 | Loud noise and Hum on speakers thru' USB Audio Interface

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