For my ear training practice, I would like to begin figuring out some Django solos on my own, without TAB. The only problem is they're tuned slightly off of A440. I'm wondering if they were tuned to a specific frequency consistently, and if so, what was it (A439 ??) , OR are there decent recordings I can buy that have been tweeked so the songs are tuned up to A440.
Let me know if you know this !