Getting a list of sound devices in the system

[MartinMcD]

Hi there,

I would like the user of my app to be able to select which audio device/soundcard to read from. At the moment I am just reading from Device 0. This works because Device 0 is the soundcard if no external device is plugged in and then any device I add is assigned to Device 0 instead.

This is a bit limited though. I know there must be a Windows api call to get an enumerated list of the active devices (in fact the express vi for sound capture has just this list). Does anyone know how to do it please?

Thanks very much,

Martin

[Shaun Hayward]

There's a really handy couple of VIs in vi.lib\sound2\lvsound.llb:

1. Get Num Devices - this lists the number of input and output devices in your system

2. Sound Device Info - returns the *NAME* of the sound device associated with a number

I normally use #1 to set N on a for loop, and populate a ring control with the names out of #2.

Shaun

[MartinMcD]

That's perfect, thank you very much for the help Shaun.

Cheers,

Martin

[ekaetz]

Getting the audio devive list by using the function "SoundNumDevices" in lvsound2.dll only works once.

If the devices on the PC change, and this function is called again, it always returns the same device list.  It is as if this DLL obtains the device list form the PC when it is loaded (maybe a class is instantiated then).  The only way to get an updated list is to relaunch your EXE or if in the dev enviroment to close all VIs that use sound tools in the dev project then open them again.

 

Does any one know a way to refresh the audio device list without restarting the app (or closing and reloading the VI)?

 

NOTE: I am using Labview 2017 SP1

Edited September 8, 2018 by ekaetz

[Its Me Ashiq]

On 9/9/2018 at 4:54 AM, ekaetz said:

Getting the audio devive list by using the function "SoundNumDevices" in lvsound2.dll only works once.

If the devices on the PC change, and this function is called again, it always returns the same device list.  It is as if this DLL obtains the device list form the PC when it is loaded (maybe a class is instantiated then).  The only way to get an updated list is to relaunch your EXE or if in the dev enviroment to close all VIs that use sound tools in the dev project then open them again.

 

Does any one know a way to refresh the audio device list without restarting the app (or closing and reloading the VI)?

 

NOTE: I am using Labview 2017 SP1

Yeah that is really annoying!!! 😤😤😤😤

[dadreamer]

1 hour ago, It's Me said:

Yeah that is really annoying!!! 😤😤😤😤

Maybe it's time to try WaveIO library written by Christian Zeitnitz then?

[Its Me Ashiq]

Fortunately Dataflow G have released this toolkit - dataflowg/g-audio: An audio library for LabVIEW. (github.com)

It satisfies all the requirements 🤩!!!