Again, Campus Difusión supports legacy editions. Look up the specific ISBN on their site. Alternatively, contact Difusión support – they sometimes provide old CDs for free if you show proof of purchase.
Remember physical media? eBay, MercadoLibre, and Facebook Marketplace often sell the original Aula Internacional 2 CD for as little as $3–5. Many former students throw away the book but keep the CD. Buy the CD, rip it to your computer using iTunes or VLC (this is legal as a backup), and sync to your phone. aula internacional 2 audio free download
Recommendation: Do not waste hours hunting for a free, safe, complete set of Aula Internacional 2 audio. The time you spend dodging pop-ups and broken links is worth more than the €12–15 price of the legal access. Again, Campus Difusión supports legacy editions
That said, if you absolutely must have it for free due to financial hardship, consider this ethical workaround: Remember physical media
Never upload or redistribute – that harms the authors who created this excellent resource.