Arman Bohn has released SK-crooner, a free vocal synth for Windows based on the “human voice” of the Casio SK-1.
“I loved this sound when I was growing up,” says Bohn, “very spooky and unnatural.”
Features:

Two separate modes:

Original (modeled after the Casio SK-1)
Tone held (for long notes)

ADSR Amplitude Envelope
Vibrato with Rate and Depth
Filter control with Frequency and [...]

 

 Casio SK-1 Human Voice [0:39m]: Play Now | Play in Popup | Download

At the Winter NAMM Show, DigiTech introduced the Vocalist Live Pro vocal harmony and effects rack processor.
The Vocalist Live Pro can create multi-part harmony by analyzing a musical accompaniment signal. The Vocalist Live Pro accepts MIDI, so you can get musically intelligent harmonies just by playing in a natural accompaniment style.
You can choose harmony shifts [...]

Our contact at Zero-G hooked us up with some samples of their new Vocaloid Prima, a virtual vocalist modeled on the voice of a professional soprano opera singer, and powered by Yamaha’s VOCALOID2 Singing Synthesis Technology.
Hit the MP3 player button below and you can check out the bizarre robo-realism of this state of the [...]

 

 Mon Coeur S'ouvre: Play Now | Play in Popup | Download

Mu Technologies recently released the Windows and Mac OS X Universal Binary VST versions of Mu Voice, a plug-in that allows you to tune your vocal recordings, apply special effects and add natural sounding harmonies when mixing your track. Mu Technologies has developed proprietary spectral analysis and synthesis techniques for vocal processing providing a unique [...]

PowerFX has released Sweet Ann, the first of their new line of vocal libraries employing Yamaha’s Vocaloid2 software. Vocaloid software applications let users type in words and melody and have the virtual vocalist ”sing” back the input.
If it all sounds a bit creepy and cool, check out the demos at the PowerFX site or visit Sweet Ann’s [...]

Antares has announced the release of Harmony Engine, a Vocal Modeling Harmony Generator, available as RTAS (Mac and PC), VST (Mac and PC) and Audio Units (Mac).
The Harmony Engine is a real-time harmony generating plug-in. With four independent harmony voices, a variety of powerful harmony generating modes, humanization features for natural sounding performances, and a [...]

 

 Yesterday - dry [0:50m]: Play Now | Play in Popup | Download

 

 Yesterday - harmonized [0:49m]: Play Now | Play in Popup | Download

Musikmesse: Flame introduced the Flame MIDI Talking Synth, a small-sized MIDI-controlled sound module based on the analog Speakjet chip, produced by the U.S. company Magnevation.
Originally designed for basic artificially generated speech output in American English tongue, it has been refined and further developed as an 8-bit sound module with speech-like sounds and synthetic robot voices [...]

 

 Flame MIDI Synth Demo [0:35m]: Play Now | Play in Popup | Download

VirSyn has released Cantor 2.1, an update that adds a voice model called “Time model”, especially suited for male voices.
35 new voices are now at your disposal, many of them using the new “Time model”. Last not least we added demo project files to help you with your first experience.
A demo version is available. You [...]

 

 Resenfole VirSyn demo [0:40m]: Play Now | Play in Popup | Download

2007 NAMM Show: DigiTech, a manufacturer of musical instrument signal processors, and a Harman International, announced two new vocal effects processors - the Vocalist Live 2 and Vocalist Live 4 vocal harmony and effects floor processors for performing guitarists.
Utilizing DigiTech’s MusIQ technology, the Vocalist Live processors generate intelligent, multi-part vocal harmonies using the singer’s voice. [...]

Bitnotic’s VX-323 Vocal Synthesizer is a free software instrument for the Macintosh that plays synthesized speech. Here’s an example of the VX-323 in action (MP3)
The app is currently in beta testing, so the instrument has a built-in expiration date, but it seems stable.
VX-323 lets you play synthesized speech with your Mac using your mouse or [...]

Bitnotic has introduced VX-323, a free software instrument that plays real-time synthesized speech in response to MIDI commands. (MP3 sample)
VX-323 lets you incorporate synthesized speech into performances or record it in programs like Garageband.
The program features an easy-to-use interface, flexible instrument setup, and high-quality audio output. You can use it for recording or live [...]

 

 Bitnotic VX-323 Vocal Synthesizer [0:19m]: Play Now | Play in Popup | Download

A time limited, but fully functional demo version of Cantor 2 is now available.
Cantor is a realtime vocal synthesizer that lets you enter lyrics and then “sing” them as you play a melody on a MIDI keyboard. More than a dozen of demo projects including the one used to make our audio demos gives you [...]

Virsyn is shipping Cantor 2, described as “a breakthrough in synthesis of solo, background and choir voices.”
According to Virsyn, a vast improvement in sound quality and intelligibility has been achieved. The range of voice characters is virtually unlimited: it goes from robotic voice characters to highly expressive and nearly realistic sounding voices.
The completely reworked [...]

VirSyn sends word that Cantor 2 is coming soon.
This bilingual vocal synthesizer creates eerily lifelike vocals. While they aren’t likely to be confused with real vocals, they have a realistic vocal quality to them that’s very different than vocoder effects.
Mike Oldfield used Cantor recently to add vocals on his latest CD, Light and Shade.
Here’s an [...]

Ueberschall announces the availability of The Voice Vol.1 for Mac and PC in October 2006.
Description:
This is something revolutionary new: Vocal phrases of a choir with independently editable voices in a PlugIn for VST, Audio Units and RTAS. For the first time ever it is possible to change a single voice within a choir - independently [...]