《PTX, Vols. 1 & 2》是五声音阶第四张唱片，亦是他们首张录音室专辑，2014年7月30日率先于日本推出，随后亦于2014年8月15日及2014年8月28日分别在澳洲及韩国发行[1][2]。专辑收录了两张同名迷你专辑《人声第一辑》及《人声第二辑》里全16首作品，还精选了其余3首曾以单曲形式推出的歌曲。[3]
日本版额外收录了迪士尼电影《魔雪奇缘》歌曲《Let It Go》的翻唱版本，亦是整张专辑唯一一首未曾发行的行品。另外，此专辑是组合加盟RCA唱片后首张音乐作品。
| 通常版[1] |
|---|
|
| 1. | Starships | Onika Maraj, RedOne, Rami Yacoub, Carl Falk, Wayne Hector | Nicki Minaj | 3:01 |
| 2. | The Baddest Girl | Scott Hoying | Pentatonix | 3:49 |
| 3. | Somebody That I Used to Know | Gotye, Luiz Bonfá | Gotye featuring Kimbra | 3:19 |
| 4. | Aha! | Imogen Heap | Imogen Heap | 2:37 |
| 5. | Show You How to Love | Avi Kaplan, Kevin Olusola | Pentatonix | 3:53 |
| 6. | Love You Long Time | Salaam Remi, Jazmine Sullivan | Jazmine Sullivan | 3:05 |
| 7. | We Are Young | Nate Ruess, Andrew Dost, Jack Antonoff, Jeff Bhasker | fun. featuring Janelle Monáe | 3:07 |
| 8. | Can't Hold Us | Macklemore, Ryan Lewis | Macklemore, Ryan Lewis | 3:18 |
| 9. | Natural Disaster | Pentatonix | | 3:30 |
| 10. | Love Again | Pentatonix | | 3:18 |
| 11. | Valentine | Jessie Ware, Sampha | | 2:37 |
| 12. | Hey Momma / Hit the Road Jack | Kevin Olusola, Percy Mayfield | Pentatonix(前) / Percy Mayfield(后) | 3:01 |
| 13. | I Need Your Love | Calvin Harris, Ellie Goulding | Calvin Harris | 2:52 |
| 14. | Run to You | Pentatonix, Ben Bram | | 4:25 |
| 15. | Daft Punk | Thomas Bangalter, Guy-Manuel de Homem-Christo | Daft Punk | 4:08 |
| 16. | Save the World / Don't You Worry Child | Axwell, Steve Angello, Sebastian Ingrosso, John Martin, Michel Zitron, Vincent Pontare | Swedish House Mafia | 3:47 |
| 17. | Radioactive（featuring Lindsey Stirling） | Ben McKee, Dan Platzman, Dan Reynolds, Daniel Wayne Sermon, Alex da Kid, Josh Mosser | Imagine Dragons | 3:46 |
| 18. | Say Something | Ian Axel, Chad Vaccarino, Mike Campbell | A Great Big World | 4:33 |
| 19. | Royals | Lorde, Joel Little | Lorde | 3:51 |
| 总时长： | 1:05:49 |
|---|
| 日本版特别收录[3] |
|---|
|
| 20. | Let It Go | Kristen Anderson-Lopez, Robert Lopez | Idina Menzel | 3:22 |
| 总时长： | 1:09:11 |
|---|
