<Sound Dev> AudioSystem.getMixerInfo() takes about 30 sec to report a gone audio device

Sergey Bylokhov Sergey.Bylokhov at oracle.com
Tue Jan 7 22:22:57 UTC 2020

Hi, Marcus.

I think the reason is this:

/* half a minute to wait before device list is re-read */

This delay really looks too big, can you please file a bug:

On 1/7/20 9:53 am, marcusl wrote:
> Hi there,
> I'm running a Java program under Windows 7 which just fetches the audio
> devices via the AudioSystem.getMixerInfo() and checks for a specific device.
> This device is a USB audio device. When the device gets plugged into the
> computer it takes about 3 sec until it is recognized by the AudioSystem. So
> no problem here. But if the device has been unplugged it takes about 30 sec
> until this situation is correctly reported by the AudioSystem. This happens
> with every USB-device.
> So, I just want to ask if this is because of the JVM<->Windows communication
> or if there is some timeout hidden throughout the audio system
> implementation. I can totally live with the 30 sec if there is no sane way
> to reduce this time. But I'm also interested in the "why".
> Thanks in advance
> Marcus
> --
> Sent from: http://openjdk.5641.n7.nabble.com/OpenJDK-Sound-API-Development-f102085.html

Best regards, Sergey.

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