Topic: Windows set output to NULL device

[Decker97]

This is a radio station broadcaster project. I want to be able to let the DJ set the output of the windows program to a NULL device so there is no sound coming from the local speakers, but the channel is still playing for the listeners.

I have this code for adding the null device to a select list for the user:

        public List<BASS_DEVICEINFO> GetOutputDevices(System.IntPtr MainWindowHandle)
        {
            List<BASS_DEVICEINFO> ret = new List<BASS_DEVICEINFO>();
            BASS_DEVICEINFO info = new BASS_DEVICEINFO();

            //Add a device going to null:
            BASS_DEVICEINFO nl = new BASS_DEVICEINFO();
            nl.name = "NULL - No audio output";
            nl.driver = null;
            nl.id = "0";
            nl.flags = BASSDeviceInfo.BASS_DEVICE_ENABLED | BASSDeviceInfo.BASS_DEVICE_TYPE_DIGITAL;
            ret.Add(nl);
            int Count = Bass.BASS_GetDeviceCount();
            for (int n = 0; n < Count; n++)
            {
                BASS_DEVICEINFO add = new BASS_DEVICEINFO();
                Bass.BASS_GetDeviceInfo(n, add);
                if (add.id != null)
                {
                    ret.Add(add);
                }
            }
            return ret;
        }

But, when I try to change to this device, the id is null:
(see attached image).
and it still plays on the default device.

What am I doing wrong?

TIA.

-Mike

[Ian @ un4seen]

The "No sound" device is always device 0. So you can use it like this, for example:

Code: [Select]

Bass.BASS_Init(0, 44100, BASSInit.BASS_DEVICE_DEFAULT, this.Handle);

If you want to move a BASS channel between devices then you can use BASS_ChannelSetDevice for that. Note that the new device needs to be initialized before you can do that. Please see the documentation for details.

[Decker97]

hmm, I'm currently using SetDevice, not SetChannelDevice:

            LogText("InitBass()");
            if (!BassInitialized)
            {
                int i = 1;
                Devices = new List<Device>();
                foreach (var item in GetOutputDevices(MainWindowHandle))
                {
                    Bass.BASS_Init(i, 44100, BASSInit.BASS_DEVICE_DEFAULT, m_output_handle);
                    Device d = new Device();
                    d.DeviceIndex = i;
                    d.Handle = item.ToString();
                    Devices.Add(d);
                    i++;
                }
                Bass.BASS_SetDevice(CurrentDeviceIndex);
                Bass.BASS_SetConfig(BASSConfig.BASS_CONFIG_BUFFER, LATENCY);
                BassInitialized = true;
            }

[Decker97]

I got it working with ChannelSetDevice and controlling my devices better. Had to start the InitBass at zero as well.

-Mike