Cross platform WAVE Audio playback in C++

I have written an application which converts an integer into its spoken English equivalent. This code passes filenames to be played by the PlaySoundA function in the Windows API:

vector<string> sounds = NumberConvert(atol(argv[1]));

    int i;
    for (i=0; i < sounds.size() - 1; i++) {
        sounds[i].append(".wav");
        PlaySoundA(sounds[i].c_str(), 0, SND_SYNC);
    }

Would it be possible to create a wrapper function which would use the PortAudio API in the background, to maintain cross platform compatibility?