The most reliable and legal way to access the soundtrack is through official Nintendo services.
ACNL Able Sisters ringtone by aminalcrossing - Download on ZEDGE™ | b6ab. aminalcrossing. 2018 Mar 1. Able Sisters Crossing City MP3 Download
: Nintendo soundtracks are often released as physical CDs, primarily in Japan. You can import these through specialist retailers to obtain high-quality audio that can be ripped to MP3 for personal use. Community-Sourced and Archival Options The most reliable and legal way to access
: This dedicated smart device app is available to Nintendo Switch Online members at no extra cost. It allows you to stream and download tracks for offline listening within the app. The Animal Crossing series, including New Leaf and the original game, has already been added to its library. 2018 Mar 1
Animal Crossing: City Folk: Able Sisters - Smash Custom Music
Able Sisters Animal Crossing City Folk Music Extended HD.mp3
Various platforms host versions of the song for streaming or specific use cases: