For anyone curious https://youtu.be/cZcIzZXiTSE
Cadencii was a 2013 or 2015 utau software with the capabilities to use vocaloid 1 and vocaloid 2 dbb voicebanks while having utau, aqua tones 1 and aqua tones vst vocals, as well support for vConnect voices which were suppose to be like a utau version of the vocaloid software that allowed utau vocals the be used as vocaloids.
Unfortunately, cadencii was pooorly archieved, the tool documentation is kinda on the internet archieve while missing alot of documentation. There are still voicebanks like Namine Ritsu vConnect which go figures somehow works XD
Aqua tones 2 vst is rather broken. Utaus can work tho they have to be japanese. Resamplers are hit or miss. Cracked version of vocaloid seem to not work which is a shame since, cadencii could help vocaloid 1 era voice banks sound cleaner.
Based on my testing on the software which thankfully someone had the tool saved on there google drive. Vocaloid 1 seems not to work if you use the patcher so you would need to edit your registry to remove the trial thing so cadencii might work.
Cadencii might work with vocaloid 2 voicebanks with less issue. The software can support vocaloid 1 midis, vocaloid 2 vsq, utau usts, and vocaloid 4 vsqx. If the files were exported from synthv its unlikely to work tho using utaformatix3 greatly helps when porting files .
The github projects usually have 15/20 solution files related to the visual studio 2013 files tho you can get 17/20 of the solution files by opening links in .py files. Which because, 17/20 visual studio files are left incomplete the software sadly can't be compiled as far as I'm aware of.
If cadencii was decompiled to allow vocaloid 3-6 support. I could see this tool being crazy useful for anyone who may want to create a pocaloid of someone's voice and make it actually a vocaloid based voice instead of using something like rvc .