11. It features vocals sung by Oldfield and Reilly, both through a vocoder . 12. NXDN uses the AMBE + 2 vocoder ( codec ) for digital audio. 13. Harmony plays keyboards, guitars, drums and the vocoder on the album. 14. Wagner provides the synthesized vocoder voice for the intro and outro to the parade. 15. The vocoder enables understandable speech, but the quality is very unnatural and synthetic. 16. Unlike the vocoder used in FS-1015, CELP provides more natural speech. 17. Reilly sings with a clean voice while Oldfield uses vocoder most of time himself. 18. We then added the vocoder and Trevor's vocal to the mix ". 19. Elkind's singing voice was processed via a vocoder on several Carlos recordings. 20. They include network optimization and vocoder rate encapsulation.