Khmer text should look like: ស្រាប់ (subscripts below the main consonant). If your Kh Rayuth font shows consonants side-by-side (e.g., ស + ្រ + ប + ់ ), you are using a font.
Styles include aksar chrieng (slanted), aksar mul (round), and more. kh rayuth font work download
He took a deep breath and dialed the number listed in the article. A raspy, old voice answered. aksar mul (round)