Resampler/Wavtool Directory
Resamplers and wavtools are what make your voicebanks sing! Resamplers together with the wavtool take your samples and take them apart, pitch, edit, apply flags, etc. and then reassemble them to create the audio output for your voicebanks. They also are responsible for generating FRQ (or other types of frequency map) files so that they can quickly go through this process.
Resampler List
resampler- this is the default resampler that comes with UTAU
fresamp ver11 ver14 by Ameya- known for strengthening voices and reducing background noise. Can have a nasally quality on higher notes. (Mod heta note: I personally think fresamp11 produces higher quality renders than fresamp14)
world4utau (w4u) by Ameya - is very picky with voicebanks, reacts very strongly to background noise. Requires FFTW files to work. Comes with source code. w4u Zany ver. by Zany is an updated version. wn4u/worldend4UTAU by Zany ports a different version of WORLD0.2.0
phavoco by Ameya- Phase vocoder, adds a vocoder effect to renders. phaavoco is an updated version. There's also an archive of this resampler's download in case the UTAU site goes down put together by Mod heta.
Model4/M4 by Ameya- was a privately distributed through UTAU Days, an invitation only SNS. Beta resampler that was never publicly released due to instability.
doppltler by Ameya- Supports 16, 24, 32 bit .wav files, Supports mp3, OGG Vorbis and FLAC encoded voicebanks. OTO files should look like ".mp3.wav" in order to use them. The R flag reverses samples and can be used to create pseudo-CVVC. There's also an archive of this resampler's download in case the UTAU site goes down put together by Mod heta.
f2resamp by Ameya- A completely new resampler meant to be part of the fresamp collection. There's also an archive of this resampler's download in case the UTAU site goes down put together by Mod heta.
TIPS by ScientistB- usually works really well for softer voicebanks. Can make banks have a metallic quality and emphasize background noise more than other resamplers.
bkh01 by Zteer- With the right flags, you can get more realistic renders with softer voices but with stronger voices, it can create a lot of distortion, metallic and nasally qualities.
tn_fnds by Zteer- Uses looping samples to render files instead of stretching unlike most resamplers. Using the e flag will make it stretch. Similar to TIPS but doesn't seem to magnify noise as much. Requires FFTW files to work. tn_fndsX and tn_fnds_PB by Zany are variations of tn_fnds. young3 by Zany is a version of tn_fnds that uses Harvest.
EFB-GT by Custom.Maid- Works very well for soft voices and smoothing out noise while getting crispy consonants
EFB-PB by Custom.Maid- Likely works well for soft voice but requires EFB-GT to work (See below for why it be hard to use) (Mod heta note: I don't think I've ever been able to get this resampler to work in 12 years of using UTAU; you can get away with not downloading it.) Requires FFTW files to work.
EFB-GW by Custom.Maid- overseas users have had trouble getting this resampler to work. (Mod heta note: I don't recall being able to get this resampler to work in the 12 years I've used UTAU) Requires FFTW files to work.
WARP by Custom.Maid- Works better on lower notes but renders fast. Uses .llsm files. EFB-BS by Zany is a version of WARP that can use FRQ files instead of llsm files. EFB-BH by Zany also can use FRQ files but uses HARVEST.
moresampler by Kanru Hua- Based on libllsm. Flags can greatly change the voice such as breathiness, tension, growl, etc.
utaugrowl by _torifly- patches resamplers with growl capabilites and flags.
presamp by Delta- Automatically converts USTs between formats such as CVVC and VCV. You need to patch resamplers to use.
PyRwu by Delta- PyWorld based resampler.
What are flags
Flags are an editing feature that change the tone of the voice. Each resampler uses their own unique set of flags that you enter into the rendering options box in the project property or flag box in the note property. It should be noted that flags in the note property will override the flags in the project property. You can find out about all the different flags using the Flaglist by susrever. This document has the list of flags for most publicly available resamplers and what they do.
Resampler Plugins
Speedwagon by Custom.Maid- quickly creates FRQ (or whatever other file types) for resamplers.
Resampler Patcher by nmasao- improves resampler speed and performance, and also allows you to use multiple resamplers in the same UST. Uses flags to switch between the different resamplers.
Wavtool List
(Mod heta note: to be entirely fair, wavtools mostly change smoothness but you might not be able to tell the difference between them to be entirely honest.)
wavtool by Ameya- default wavtool. wavtool64 by Ameya ports it into 64bit.
wavtool2 by nmasao
wavtool4vcv by nmasao -made specifically for smoothing out VCV voicebank but also works for CVVC.
wavtoolex by Delta- included with presamp
moresampler by Kanru Hua
