Resamplers

Since the birth of UTAU, resamplers have been crucial to ensure vocals can be synthesized. There have been 13 resamplers that have been developed that we know of. Resamplers are an intergral piece of UTAU, with many being developed by people not involved with the development of UTAU itself.

What are Resamplers

Resamplers are what's responsible applying formant filters, generating .frq files (or whatever filetype the resampler uses) to speed up rendering, and essentially make the UTAU sing.

Selecting Resamplers

To select a resampler, navigate to Project, then click Project Property. At the bottom of the window will be a box for resamplers labeled Tool 2 (resample).
Either type out the resampler's name in the box, or click "..." to navigate to the resampler.

List of Resamplers

Although these are samples of each resampler, keep in mind that resamplers can sound drastically different depending on the voicebank, for better or for worse.

resampler
Default resampler that comes with UTAU. Uses frq files. Latest versions are always packaged with the program. Developed by Ameya.

fresamp
Known to reduce background noice as well as it's nasal qualities on higher notes. Uses frq files. Latest version tweeted by Ameya. Developed by Ameya.

※Use the "F" flag with negative values to remove unwanted nasal sound

world4utau
Based off the WORLD engine. Uses .dio .star, and .platinum files. .Latest version on UTAU's website. Developed by Ameya.

※Requires FFTW files

phavoco
Phase vocoder resampler. Uses .frq files. Latest version tweeted by Ameya. Developed by Ameya.

model4
Works well with softer voices and background noise. Uses .frc files. Privately distributed through UTAU Days, an invite only UTAU SNS. Developed by Ameya.

TIPS
Suits male voices and lower notes, although it can bring out background noise. Uses .pmk files. Latest version on ScientistB's fc2. Developed by ScientistB.

tn_fnds
Based off the WORLD engine. Uses .[add later] files. Latest version on Zteer's website. Developed by Zteer.

※Requires FFTW files

bkh01
Latest version on Zteer's website. Developed by Zteer.

EFB-GW
Predecessor of EFB-GT and EFB-PB, very finnicky. Based off the WORLD engine, uses .dio .star, and .platinum files. Distribution has ended. Developed by Custom.Maid.

※Requires FFTW files

EFB-GT
"Eternal Force Blizampler -Galaxy Tear-". Based off the WORLD engine, uses .dio .star, and .platinum files. Latest version on Custom Maid's blog. Developed by Custom.Maid.

※Requires FFTW files

EFB-PB
"Eternal Force Blizampler -Phantom Blood-". Based off the WORLD engine, uses .dio .star, and .platinum files. Latest version on Custom Maid's blog. Developed by Custom.Maid.

※Requires FFTW files

WARP
Renders fast; can be finnicky. Uses .llsm files. Latest version on Custom Maid's blog. Developed by Custom.Maid.

VS4U
Stands for "Vocalshifter for UTAU". Uses .vs4ufrq files. Latest version on Ackie's website. Developed by Ackie.

UTAUgrowl
Growling "resampler". Allows the user to use resamplers while adding a growling flag, "w". Latest version on Torifly's blog. Developed by Torifly.

presamp
"resampler" that auto converts .ust files to CVVC or VCV from CV format. Allows for other resamplers to be used in conjunction with presamp. Latest version on Delta's blog. Developed by Delta.

Moresampler
First overseas developed resampler; also doubles as the wavtool option and can oto VCV. Uses .llsm files. Latest version on Kanru Hua's website. Developed by Kanru Hua.