Vocaloid keyboard announced

At long last, Yamaha have announced their Vocaloid™ keyboard, the VKB-100. The VKB-100 is a keytar design similar to the prototype shown at the “Two Yamahas, One Passion” exhibition at Roppongi Hills, Tokyo, July 3-5, 2015.

More details will be released in December 2017. However, this much is known:

  • Lyrics are entered using a dedicated application for smart phones and tablets via Bluetooth.
  • VY1 is the built-in default singing voice.
  • Up to 4 Vocaloid singers can be added using the application.
  • Four Vocaloid voices will be available: Hatsune Miku, Megpoid (GUMI), Aria on the Planets (IA), and Yuzuki Yukari.
  • Melody is played by the right hand while the left hand adds expression and navigates through the lyrics.
  • A speaker is built-in making the VKB-100 a self-contained instrument.

The VKB-100 was demonstrated at the Yamaha exhibition booth at the “Magical Mirai” conference held at the Makuhari Messe, September 1-3, 2017. Price is TBD.

VY1 is a female Japanese voice developed by Yamaha for its own products. VY1 does not have an avatar or character like other Vocaloid singers. This makes sense for Yamaha as they can freely incorporate VY1 in products without playing royalties or other intellectual property (IP) concerns.

The Vocaloid keyboard has had a long evolution, going through five iterations. The first three models did not use preloaded lyrics. Instead, the musician entered katakana with the left hand while playing the melody with the right hand. This proved to be too awkward and Yamaha moved to preloaded lyrics. The left hand controls on the neck add expression using pitch and mod wheels. The left hand also navigates through the lyrics as the musician “sings” via the instrument. The current lyrics are shown in a display just to the left of the keyboard where the musician can see them.

Yamaha will release more information on the Vocaloid keyboard site.

If you want to get started with Vocaloid and don’t want to spend a lot of Yen (or dollars), check out the Gakken NSX-39 Pocket Miku. Pocket Miku is a stylophone that plays preloaded Japanese lyrics. The NSX-39 also functions as a USB MIDI module with a General MIDI sound set within a Yamaha XG voice and effects architecture.

Be sure to read my Pocket Miku review and browse the resource links available at the bottom of the review page.

Copyright © 2017 Paul J. Drongowski

Pocket Miku software resources

This page is a collection of resources for using and programming Gakken Pocket Miku, also known as the “NSX-39”. It starts out with a cheat sheet for using Pocket Miku, moves on to Web-based applications, and finishes with customization and MIDI System Exclusive (SysEx) messages.

Be sure to read the Pocket Miku user’s guide before starting. The material below is not a hand-holding tutorial!

Pocket Miku cheat sheet

Stylus area

The lower part of the stylus area is a chromatic keyboard which plays notes. The upper part of the stylus area is a ribbon controller. Touch the stylus to either area to make music.

This is a classic resistive keyboard/ribbon controller. Stylus actions are converted to MIDI note ON, MIDI note OFF and pitch bend messages. The MIDI note is fixed: F#. MIDI pitch bend messages determine the actual final pitch which is heard.

Operating modes

Pocket Miku has two major operating modes:

  1. Normal mode
  2. NSX-1 compatibility mode

Pocket Miku boots into normal mode. In this mode, the NSX-39 recognizes and responds to stylus actions, button presses, etc.

Pocket Miku has three submodes in the normal operating mode:

  1. Do-Re-Mi mode with scales (default)
  2. A-I-U-E-O mode with vowels (SHIFT + vibrato button)
  3. Preset lyric mode with 5 lyrics (SHIFT + one of the AEIOU buttons)

The default phrases in preset lyric mode are:

    SHIFT + A    Konnichiwa Arigato (Hello, thank you)
    SHIFT + I    Butterfly song (choucho)
    SHIFT + U    Cherry blossom song (Sakura)
    SHIFT + E    Auld Lang Syne (Hotaru no hikari)
    SHIFT + O    Irohanihoheto

The magic key combination U + VOLUME UP + VOLUME DOWN switches between normal mode and NSX-1 compatibility mode. Pocket Miku plays a high hat hit when changing modes (not a “beep”). The Yamaha Web applications use NSX-1 compatibility mode. NSX-1 compatibility mode is also good for DAW-based sequencing since it decreases latency by disabling the interpretation of MIDI System Exclusive messages that are meaningful only to the NSX-39 microcontroller.

Buttons

Pocket Miku responds to single button presses and combinations:

    A-I-U-E-O    Selects on of the vowel phonemes
    VIBRATO      Adds vibrato to the sound
    SHIFT        Selects additional functions and modes
    VOLUME UP    Increase volume
    VOLUME DOWN  Decrease volume

    SHIFT + A, SHIFT+I, ...   Select A-I-U-E-O vowel mode
    SHIFT + VIBRATO           Select Do-Re-Mi mode
    SHIFT + VOLUME UP         Octave up
    SHIFT + VOLUME DOWN       Octave down
    VIBRATO + VOLUME UP       Pitch bend up (up one semi-tone)
    VIBRATO + VOLUME DOWN     Pitch bend down (down one semi-tone)

    A + VOLUME UP + VOLUME DOWN        Panic reset
    U + VOLUME UP + VOLUME DOWN        Select NSX-1 mode
    O + VOLUME UP + VOLUME DOWN        Retune Pocket Miku
    SHIFT + VOLUME UP + VOLUME DOWN    Initialize (factory reset)

Web-based applications

Gakken NSX-39 applications

Gakken provide three applications specifically for the NSX-39 (in normal mode). The applications are at http://otonanokagaku.net/nsx39/app.html.

Google Chrome version 33 or later is required because the Gakken applications use the Web MIDI API.

Connect NSX-39 to your computer with a USB cable and set the power switch of the NSX-39 to “USB”. If you do not connect the NSX-39 before you start Google Chrome, the NSX-39 will not be recognized by the application.

The Web MIDI API must be enabled in Google Chrome. After starting Chrome, enter:

    chrome://flags/#enable-web-midi

in the address bar as shown on the first “Browser Settings” screen. Then, enable the API in the “Enable Web MIDI API” column. Please click the appropriate button (e.g., “Use Windows Runtime MIDI API”) and restart Google Chrome.

Launch the desired application from here:

Once you agree to the End User License Agreement (EULA), you can connect to the NSX-39 (Pocket Miku’s model number).

If this procedure does not work, please restart the computer and proceed from the first step.

Application: Input lyrics

You can edit the lyrics by pressing the “E” button in the lyric input slot. Only Hiragana can be input. After inputting lyrics, pressing “Enter” on the keyboard and the app sends lyric data to Pocket Miku.

After sending lyrics data, when playing Pocket Miku, Pocket Miku sings according to the sent lyrics.

Lyrics can input 64 letters per slot. There are 15 slots and they are selected with [A] - [O], [SHIFT] + [A] - [O], [VIBRATO] + [A] - [O].

Press [SHIFT] + [VIBRATO] during editing to switch to Do-Re-Mi mode.

Application: Play in realtime

This is an application where you can input and play lyrics in realtime. If you hover over the tile where the letters are written on the screen, you can pronounce that character.

Tiles can be selected from 50, mentai (voiced, semi-voiced), small letters (1) (2), jiyuu (free arrangement) mode.

Jiyuu is a mode that allows you to place characters freely using the “frog” menu:

  • Tsukasa … You can add up to 50 letters, panels.
  • Move … Move the panel to the desired position by dragging.
  • Ken … You can delete the panel by clicking it.
  • Reading … Read the saved character panel setting file.
  • Upload … Save the character panel setting as an external file.

Google Translate didn’t do so well with these instructions! Sorry.

Change configuration

Config is an abbreviation for configuration and means “setting.” With this application, you can change the settings of Pocket Miku and add new functions. The following four operations are supported:

  • Startup sound for function addition pack
  • SHIFT button Character heading / character advance
  • Effect ON / OFF
  • Harmony

Please press the “Install” button and read the displayed message and if there is no problem press the “Send” button. When all the functions are installed, a voice saying “Owarai” appears, and writing the settings is completed.

If you want to restore the settings back, please click the “Uninstall” button, read the explanation carefully, and press the “Send” button if there is no problem.

Yamaha NSX-1 applications

Yamaha provide open source sample apps (Japanese language) at http://yamaha-webmusic.github.io/. The Yamaha applications use the Web MIDI API. See the directions above in order to set up Google Chrome.

In order to use these applications, you must change Pocket Miku to NSX-1 compatibility mode by pushing U + VOLUME UP + VOLUME DOWN simultaneously.

Aides Technology application

Aides Technology is the developer of the Switch Science NSX-1 Arduino shield.

They have one very handy Web application when MIDI sequencing. The application translates romaji (kana text) lyrics to an NSX-1 System Exclusive (SysEx) message. You can copy the HEX SysEx message from the page and paste it into your DAW. On Windows, the application will put the SysEx message on the Windows clipboard automatically.

You may also need this ASCII to Hex text converter when debugging your SysEx messages.

I’m a long time SysEx HEX warrior. Trust me, this is the way to go!

Customization and MIDI System Exclusive messages

Customization is the most difficult topic due to its complexity and the general lack of English language resources. Customization is performed through MIDI System Exclusive messages instead of simple textual commands. This approach enables use of the Web MIDI API, but makes it darned difficult to compose messages by hand.

I’m told that the Gakken Official Guide Book (Gakken Mook) contains a short section about customization via SysEx. However, one cannot cram a paper magazine through Google Translate. 🙂

The next best thing is the Pocket Miku Customization Guide (PDF) by Uda Denshi (polymoog). This guide and Google Translate will only take you so far.

The absolute best English language resource is the series of blogs written by CHH01:

Please note that Pocket Miku has two major subsystems: a microcontroller and the Yamaha NSX-1 integrated circuit. Each subsystem has its own SysEx messages. See the Yamaha NSX-1 MIDI implementation reference manual for information about its SysEx messages. Messages interpreted by the microcontroller are described in the Pocket Miku Customization Guide. These messages are turned OFF when Pocket Miku is in NSX-1 compatibility mode.

The NSX-39 SysEx implementation is very powerful. You can change the lyrics which are stored in flash memory (15 lyric slots), change the way the NSX-39 responds to button presses (120 command slots), read switch states, and much more. Here is a list of the main customization message types (thanks to CHH01):

F0 43 79 09 11 d0 d1 d2 d3 d4 d5 ... F7

Request Version Data          d0=0x01 d1=N/A
Version Data Reply            d0=0x11 d1=NSX-39 version data
Lyrics Entry                  d0=0x0A d1=lyrics slot number   d2=character data
Request Command Slot Details  d0=0x0B d1=command slot number
Command Slot Reply            d0=0x1B d1=command
Change Command Slot           d0=0x0C d1=command slot number  d2=command
Command Direct Entry          d0=0x0D d1=command
Lyric Number Data Request     d0=0x0E d1=N/A
Lyric Number Data Reply       d0=0x1E d1=Slot number          d2=Slot data
Lyric Details Request         d0=0x0F d1=Slot number
Lyric Details Reply           d0=0x1F d1=character count      d2=character 1, etc.
Switch State                  d0=0x20 d1=000000ih             d2=0gfedcba
NSX-39 Status                 d0=0x21 d1=Status

Good luck with your investigations and experiments!

Copyright © 2017 Paul J. Drongowski

Pocket Miku pictures

Thanks very much to our friends at japan24net on eBay! They did a superb job of packing and Pocket Miku arrived at our house in record time. どうもありがとうございました

Now, the obligatory pictures! Please click on the images for higher resolution. Front:

The back:

With the rear cover off:

And finally, the money shot:

That looks like a 12.000 MHz crystal. Sorry, I didn’t have time to work through the data sheet and compute the CPU clock frequency. (96MHz maximum)

Copyright © 2017 Paul J. Drongowski

Pocket Miku hardware resources

Pocket Miku, also known as “NSX-39,” has three major integrated circuit components:

Here is the Pocket Miku NSX-39 circuit schematic.

The Generalplus GP3101A is a system on a chip (SOC) advanced multimedia processor. The GPEL3101A is an ARM7TDMI processor with integrated RAM and many peripheral interfaces including:

  • 136KByte SRAM
  • Universal Serial Bus (USB) 2.0 interface
  • 8 channel sound processing unit (SPU)
  • SPI (master/slave) interface
  • Programmable general I/O ports (GPIO)
  • 6-channel, 12-bit analog to digital converter (ADC)
  • 16-bit stereo (2-channel) audio digital to analog converter
  • 0.5W class AB mono audio amplifier

Here is the Generalplus GP31P1003A product brief. The NSX-39 schematic does not specify the clock crystal frequency, but the GP31P1003A can operate up to 96MHz.

The Yamaha NSX-1 eVocaloid processor communicates with the GPEL3101A via SPI. MIDI messages, commands, and initialization data are communicated serially. The GPEL3101A control software converts MIDI over USB to MIDI messages sent to the NSX-1 via the SPI connection.

The GPEL3101A senses the keyboard and stylus inputs through its 6-channel, 12-bit ADC.

The NSX-1 generates a digital audio stream which is sent to the GPEL3101A digital audio auxiliary input. The GPEL3101A converts the digital audio to analog audio using its DAC. (This is a neat solution — no discrete DAC component!) The GPEL3101A sends analog audio to the external PHONE OUT and amplified audio is driven into the NSX-39’s speaker.

The Macronix MX25L1635E is a 16Mbit CMOS serial flash memory. It communicates with the GPEL3101A via SPI (4xI/O mode). The memory can retain 2MBytes of data. The MX25L1635E holds the NSX-39 control program and (probably) the initial eVocaloid database. The eVocaloid database must be loaded into an internal RAM memory within the NSX-1 eVocaloid processor.

We can infer that the eVocaloid database cannot be larger than 2MBytes. The NSX-1 typically sets aside 2MBytes for the database within its large capacity internal RAM memory. Because this memory volatile RAM, it must be initialized with the eVocaloid database at start-up. It would be a sweet hack to replace the eVocaloid database with an English language database or Real Acoustic Sound (RAS) waveforms.

The NSX-39 software keeps the lyric slots and the command slots in the Macronix flash memory. This arrangement retains lyrics and commands across power-down.

Copyright (c) 2017 Paul J. Drongowski