Previously, the TWELP 400 bps vocoder showed results comparable to the MELPe 600 bps vocoder, sometimes slightly surpassing or slightly lagging behind it depending on the language. According to the latest evaluations by DSP Innovations, TWELP 400 bps now demonstrates a small but measurable advantage in speech quality and intelligibility compared to MELPe 600 bps — especially in acoustic noise conditions — while operating at a lower bitrate
