Ive seen some scripts to make random footsteps and also scripts to change the pitch and volume of an audio source, is there a way of combining them together so not only does the audio clip change but the pitch and volume of that audio clip change as well. the scripts are shown below

this is the random audio source script

var audioSources : AudioClip[];

function Start ()
{
    audioSources = new AudioClip[5];
}

function OnCollisionEnter(collision : Collision) //or whatever you have now
{
    //when you get to the part where you want to play the sound...
    var nextClip = audioSources[Random.Range(0, audioSources.Length)];
    audio.clip = nextClip;
    audio.Play();
}

this is the change pitch/volume script

var baseFootAudioVolume = 1.0;
var soundEffectPitchRandomness = 0.05;

function OnTriggerEnter (other : Collider) {
    var collisionParticleEffect : CollisionParticleEffect = other.GetComponent(CollisionParticleEffect);

    if (collisionParticleEffect) {
        Instantiate(collisionParticleEffect.effect, transform.position, transform.rotation);
    }

    var collisionSoundEffect : CollisionSoundEffect = other.GetComponent(CollisionSoundEffect);

    if (collisionSoundEffect) {
        audio.clip = collisionSoundEffect.audioClip;
        audio.volume = collisionSoundEffect.volumeModifier * baseFootAudioVolume;
        audio.pitch = Random.Range(1.0 - soundEffectPitchRandomness, 1.0 + soundEffectPitchRandomness);
        audio.Play();       
    }
}

function Reset() {
    rigidbody.isKinematic = true;
    collider.isTrigger = true;
}

@script RequireComponent(AudioSource, SphereCollider, Rigidbody)

THANKS GUYS, Matt