Their is not enough memory in a UNO to do much more than a quarter of a second of audio, you need to add some external paged memory or get a better Arduino like the Zero. Or something like a Teensy, the version 3.6 looks like just what you need.
Their is not enough memory in a UNO to do much more than a quarter of a second of audio, you need to add some external paged memory or get a better Arduino like the Zero. Or something like a Teensy, the version 3.6 looks like just what you need.