The audio device names are truncated

This code:

foreach (const QAudioDeviceInfo &deviceInfo, QAudioDeviceInfo::availableDevices(QAudio::AudioOutput))

{ qDebug() << "Device name: " << deviceInfo.deviceName() << endl; }

Prints this:

Device name: "Speakers (Realtek High Definiti"
Device name: "Acer P241W (2- High Definition "
Device name: "Realtek Digital Output (Realtek"

The device names are truncated at 32 characters due to a limitation in Win32 API's waveInGetDevCaps() and waveOutGetDevCaps(). Those use WAVEINCAPS structure where TCHAR szPname[MAXPNAMELEN] houses 32 characters tops.
That makes it impossible to distinguish between two similar adapters installed.
Enumeration should be performed by calling DirectSoundEnumerate instead which has no such limitation: https://msdn.microsoft.com/en-us/library/windows/desktop/ee417545%28v=vs.85%29.aspx