Convert voc to spx

What is the difference between .voc and .spx?

Description: The VOC file format is an audio file format primarily used by Creative Technology's Sound Blaster sound cards for storing digital audio data. Developed by Creative Labs, the VOC format was widely used for storing sound samples and music files on PCs during the late 1980s and early 1990s. VOC files support mono and stereo sounds at various sampling rates and can contain multiple sound snippets and silence segments, making them versatile for a range of audio applications, including video games, sound effects, and voice.; Audio file compressed using Speex compression and saved in the Ogg Vorbis container format; designed as an audio compression format specifically for speech; compresses voice at 2 to 44 kbps and supports 8 kHz, 16 kHz, and 32 kHz compression in the same bitstream.