On December 28, 2016, an update for Tone Rion, along with a new VOCALOID, were announced for the VOCALOID4 Engine with a projected release date of February 16, 2017. It was also confirmed that Nemu Yumemi was the voice provider for both VOCALOIDs.
Tone Rion V4 did not receive any demos prior to her release.
|Tempo: 60 ~ 140BPM Range: A2 ~ F4|
|Trial/Demo Vers?: No Starter Available?: No|
| This is the updated version of the VOCALOID3 vocal and maintains the same nasally tone as the V3 version.
An upgrade was offered for owners of the older VOCALOID3 version of Tone Rion
|Vocal traits as noted:|
|Software issues as noted:|