Satellite M40: USB Audio does not work properly in ACPI mode

Hi all
I just bought a laptop Satellite M40 whose purpose is to be used as a portable audio system.
For this, the USB audio devices are an excellent solution.

Unfortunately, although it was working properly when recording (sound is perfect with all devices compatible USB Audio, I have tested), there is a problem in reading that I had a lot of clicks and POPs.

After a lot of research trying and google, I solved the problem by changing the computer ACPI PC Standard mode.
This is a workaround.

But this way, I don't remember what my status of battery, and my laptop does not shut down automatically.
Actually, my laptop is no longer run as a laptop :(

I suspect a very serious problem in a Toshiba components management. In particular, I wouldn't be surprised to be told that freeze the cords of some regular system of court management, and therefore the 10ms buffers audio USB fall in against the recess.

This would be so much bother me if I were not part of the technical support team of the company that launches also a few new audio USB products who will not fail to work correctly with laptops.

My question is:
Is there a driver / updating bios that gets rid of this problem?
If a person of Toshiba technical support to address this issue directly with me, I'd be happy to help, as I am personally and professionally concerned.

Thanks in advance.

[Edited by: admin]

Hello

I put t know what USB audio device you use, but most of the USB audio devices cannot use the USB power. These devices have need of an external power supply of A.C and especially this external power supplies are delivered with the USB audio device.

Also, I read on some sites that the pop occurs sometimes due to non synchronicity of the modules different buffers or / and of the use of certain applications in parallel.

The computer ACPI PC Standard mode change is one of the many solutions and proposals
You can check some patches from Microsoft. Check if all updates from Microsoft are installed.
Also change the performance options in the options of the system to adjust for best performance.
Disable Windows messenger.
Virtual memory should be set to custom size and initial size and maximum size must has the same value (ie. 512/512)
In the system.ini should the vcache is also the same: MinFileCache = 16384, MaxFileCache = 16384
Disable the peripherals such as scanner, printer.

As you can see, these issues could occur on all computers (desktop and laptop) and it s is not a problem of Toshiba. Also, contact the manufacturer for support external audio device and detailed information.

Good luck

Tags: Toshiba

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