refactor: move Vuepress files in dedicated directory

Signed-off-by: Lucien Cartier-Tilet <lucien@phundrak.com>

content/en/vocal-synthesis.md

@@ -0,0 +1,61 @@
+---
+title: Vocal Synthesis
+---
+# My works in vocal synthesis
+
+From 2011 to 2018, I worked as an amateur and professional in singing
+vocal synthesis. More precisely, I was creating vocal libraries used
+by various libraries, mainly UTAU and Alter/Ego.
+
+## UTAU
+
+I began working with UTAU first by the end of 2011 on an unnamed and
+deleted Japanese vocal library. While I didn’t maintain it for long,
+mainly due to its bad recording quality (I recorded it with a low-end
+desktop microphone) and configuration, it did teach me the basics of
+creating vocal libraries and working with audio files.
+
+In October 14th, 2012, I released my second vocal library, named
+*BSUP01 KEINE Tashi JPN VCV* which was of higher quality both due to
+the recording equipment, manner of recording, and configuration,
+though still relatively average for the time. My best work with this
+series of vocal libraries was *BSUP01 KEINE Tashi JPN Extend Power*, a
+high-energy voice made in similar circumstances but with yet again
+better know-how.
+
+This series of vocal libraries also featured *BSUP01 KEINE Tashi TIB
+CVVC* and *BSUP02 Drolma TIB*, the two first Tibetan vocal libraries
+for singing vocal synthesis worldwide.
+
+I later created in UTAU *ALYS 001 JPN*, *ALYS 001 FRA*, and *ALYS 002
+FRA* as prototypes, known as *ALYS4UTAU*, for our upcoming product
+while working at VoxWave.
+
+While all these vocal libraries have been discontinued, vocal
+libraries for *BSUP01 KEINE Tashi* and *ALYS* are available for
+download. Please refer to the following pages:
+- **BSUP01 KEINE Tashi**: [BSUP01 KEINE Tashi](keine-tashi.md)
+- **ALYS for UTAU**: [Open-Sourcing
+  ALYS](https://blog.phundrak.com/open-sourcing-alys/)
+
+## Alter/Ego
+[Alter/Ego](https://www.plogue.com/products/alter-ego.html) is a
+singing vocal synthesis engine made by [Plogue
+Inc.](https://www.plogue.com/). ALYS was its first commercial vocal
+library as well as the first professional singing vocal library
+available in French.
+
+Due to the architecture and behaviour of Alter/Ego, important changes
+had to be done to the recording script for ALYS (later re-used for
+LEORA). Including the development of the new recording scripts, the
+initial development period for ALYS spanned well over a year, with
+some additional eight to nine months for its first major update.
+
+ALYS for Alter/Ego, also known as *ALYS4AE*, is available free of
+charge as a module for Alter/Ego, and its source files are publicly
+available since December 15th, 2021. However, in accordance with
+Plogue, no reciepe for building ALYS for Alter/Ego have been made
+available.
+
+More information on open-sourcing ALYS
+[here](https://blog.phundrak.com/open-sourcing-alys/).