Re: Getting Volume Controls
Re: Getting Volume Controls
- Subject: Re: Getting Volume Controls
- From: Jeff Moore <email@hidden>
- Date: Mon, 20 Sep 2004 11:42:47 -0700
What you are missing is the fact that not all pieces of hardware have a
master volume control, which is what you are asking about in your code.
It is quite common for devices, like the built-in hardware on most
Macs, to have individual channel volumes so you would need to ask for
the volume on channel 1 and channel 2 as well as the master channel.
On Sep 18, 2004, at 11:56 AM, bryan wrote:
I am using the Java CoreAudio classes, and I want to be able to read
the
volume on the default input and output devices, but I am running into
problems:
// query for the input device -- succeeds
AudioDevice device = AudioHardware.getDefaultInputDevice();
// create a memory object to hold the Float32
CAMemoryObject propVal = new CAMemoryObject(4,true);
// query for the volume -- fails with
kAudioHardwareUnknownPropertyError
device.getInputProperty
(0,AHConstants.kAudioDevicePropertyVolumeScalar,propVal);
I have also tried to query for kAudioDevicePropertyVolumeDecibels with
the
same result.
Any idea what I am missing?
Thanks,
Bryan
_______________________________________________
Do not post admin requests to the list. They will be ignored.
Coreaudio-api mailing list (email@hidden)
Help/Unsubscribe/Update your Subscription:
This email sent to email@hidden
--
Jeff Moore
Core Audio
Apple
_______________________________________________
Do not post admin requests to the list. They will be ignored.
Coreaudio-api mailing list (email@hidden)
Help/Unsubscribe/Update your Subscription:
This email sent to email@hidden