Below is an isochronic tones deep alpha meditation video. Harmonic frequencies of the solfeggio 528hz is used for the carrier frequency.
Try to synchronize your breathing as the carrier frequencies varies. The lower tones for deep breathing in while the higher tones is for breathing out slowly.
The length of the video is only approximately 6minutes. If you want a longer entrainment time, create a playlist on youtube with it.
You may download a 'wav' version of this tone here at:
Deep Alpha Meditation