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Yumemi Nemu VOCALOID4 | Songs Albums Notable Originals

This article is about the VOCALOID4 software known as a voicebank. If you are looking for the VOCALOID character then click here.



Tone Rion is a Vocaloidol, concept planned for Moe Japan's VOCALOIDs. It is unclear whether or not Nemu is a Vocaloidol.


On December 28, 2016, Yumemi Nemu, along with an update for Tone Rion, were announced for the VOCALOID4 engine and were expected to release on February 16, 2017. A starter pack for Nemu would be made available, it was limited to 1,000 copies and would come with a tutorial DVD.[1] It was also announced that Nemu Yumemi was the voice provider for both characters.[2]


The starter pack was made available for pre-order in the Makujin Arena Tour 2017 at the Dempatow Booth, who pre-ordered at the booth would receive VOCALOID stickers as bonus. [3][4]

In a interview with the website DTM station, Shuzo Roy Baba noted that the recording process was different from the normal VOCALOID recordings, to preserve the characteristics of the voicer.

He also noted that the development of the voicebank was smooth and enjoyable, it took 3 to 4 months and they were able to release and commercialize the voicebank in a very short time.[5]

Product Information[]



あのね…実はわたし、夢眠ねむなんだ… (Ano ne... Jitsu wa Watashi, Yumemi Nemu Nanda...) YouTube

System Requirements[]

Work in Progress


Product Information
  Optimum Range: G#2 ~ F4  Optimum Tempo: 60 ~ 140 BPM
  Total Tempo (min-max): 80 BPM  No. of Keys: W ~ 13, B ~ 9, Total ~ 22
  Trial/Demo Vers?: No  Starter Available?: Yes  App vers.?: Yes
Package details as noted:

Though both Tone Rion and Nemu share the same provider, the Nemu product is intended to be a faithful recreation of the provider in contrast to Tone Rion and was recorded in her normal talking voice.

Also included is over 130 recordings of the provider.

Vocal traits as noted:
  • Produces more realistic results than Tone Rion.
  • She has a larger vocal range than Tone Rion.
  • Nemu's vocal sounds more mature than Tone Rion's vocal and is intended to be more adult-like.
  • The vocal has more power in its tone than Tone Rion.
Software issues as noted:
  • Though treated as different singers, there is sometimes problems with separating Nemu and Rion from each other. When singing something simple that doesn't challenge either vocal, they can often sound very alike and their core very similar sounding. This is simply because they share the same provider for their voices.
    • Nemu leaves Rion behind when their vocals are pushed to their limits, as Nemu's vocal performance can go further then Rion's vocal performance overall.
    • Nemu was recorded with the new VOCALOID4 recording style, which allowed more vocal traits to be recorded, while Tone Rion was recorded with the old method style used until VOCALOID3. The new recording style sacrifices ease of use in order to capture more vocal traits. The result is if the pair are compared to vocls of their same type, Nemu in theory will sound more distinct then Rion does.
Voicebank sample

Yumemi Nemu VOCALOID4

Cross-Synthesis as noted:
  • Yumemi Nemu and Tone Rion V4 can use XSY with each other.
    • In total two packages offer the equivalent together of 2 additional voicebanks achievable via XSY. The total tone variation offered by the package comes to a theoretical 4 voicebanks in total.