void Update()
    {
        synth.feedback    = transform.position.x * 0.3f + 0.5f;
        synth.modfeedback = transform.position.z * 0.3f + 0.5f;
        synth.modulation  = transform.position.y * 0.75f;

        if (!isPlaying)
        {
            if (transform.position.y > 0.4)
            {
                isPlaying = true;
                synth.KeyOn(note);
            }
        }
        else if (transform.position.y <= 0.4)
        {
            isPlaying = false;
            synth.KeyOff();
        }
    }
    // Update is called once per frame
    void Update()
    {
        if (Input.GetMouseButton(0))
        {
            transform.position = Camera.main.ScreenToWorldPoint(Input.mousePosition) + new Vector3(0f, 0f, 20f);
            float note_on = notes[(int)(Mathf.Floor(Mathf.Abs(transform.position.x + 1f) * 5f) % 8f)] + Mathf.Floor(transform.position.y + 1 * 2) * 12f + 20f;

            if (!selected)
            {
                synth.KeyOn(note_on);
            }
            selected = true;
        }
        else
        {
            if (selected)
            {
                selected = false;
                synth.KeyOff();
            }
        }
    }