ตัวแปลงไฟล์ออนไลน์ฟรี OGA เป็น CVSD

OGA is an audio extension for OGG file and it was developed by Xiph.Org Foundation. OGG is an open container format designed for streaming and may contain independent video, text and audio files. To open OGA, you need either to install an appropriate software like Vorbis, or to convert the file to a more common format.

Continuously Variable Slope Delta modulation is a voice coding method. It is a delta modulation with variable step size (adaptive delta modulation), first proposed by Greefkes and Riemens in 1970