Because some our clients ask us regarding quality of the open-source CODEC2 vocoder, we've published the comparison of this vocoder with our TWELP vocoder (as well as with MELPe vocoder) for 700 bps and 2400 bps bit rates.
Now everybody may see and listen a difference.
Please visit these pages for details:
CODEC2 vs TWELP at 700 bps
CODEC2 vs TWELP at 2400 bps