AudioSource es el componente que reproduce sonido en Unity.

Obtener referencia

private AudioSource audioSource;

void Awake()
{
    audioSource = GetComponent<AudioSource>();
}

Reproducir

audioSource.Play();

Pausar

audioSource.Pause();

Continuar

audioSource.UnPause();

Detener

audioSource.Stop();

Propiedades útiles

audioSource.volume
audioSource.pitch
audioSource.loop
audioSource.mute
audioSource.isPlaying

Cambiar clip

audioSource.clip = sonido;
audioSource.Play();

Resumen rápido

Play()
Pause()
UnPause()
Stop()

volume
pitch
loop
mute
isPlaying