Documentation for V-Drum Explorer

All source code is in the Drums directory of the GitHub repo.

This is not a MIDI sequencer or anything similar; it’s purely for fetching and manipulating information from Roland V-Drum kits.

I’m very grateful to Roland for providing the TD-17 MIDI implementation document which has been absolutely vital in writing this code. (There’s now a new document as well, with changes for the v2 firmware.)

Feedback is very welcome - it’s still early days, but please email or file an issue to let me know how you get on with this.

Note: this user guide is accurate to 1.0.0-alpha05; it needs updating for 1.0.0-alpha06+, with new screenshots etc.



Download: Windows Installer

As of 1.0.0-alpha02, there’s a Windows installer. Download the latest installer above, or from the releases on GitHub. If you use GitHub, you’ll need to expand the “Assets” part of the given release. If you’d prefer not to run the installer, there’s a zip file as well.

The application that’s installed is called “V-Drum Explorer”; if you’re using the zip file, you want to run VDrumExplorer.Wpf.exe.

If Windows SmartScreen gives a warning, click on “More Info”, check that it is signed by me (“Jonathan Skeet”) and then choose the option to run it.

Important notes for drum kit connection

The USB Driver Mode must be “vendor” for the V-Drum Explorer to detect it. The “generic” USB mode is the factory default, so you’ll need to change this (which includes a drum kit reboot) before starting the Explorer.

Additionally, in MIDI settings, the “Receive Exclusive” option must be set to “On”.


There are four windows in the application:

When the application is launched, the Module Loader will be shown.

Module Loader

This window should be left open; closing it will close all other windows. It also contains the log which can be saved to disk and then included when filing an issue

Module loader screenshot

The log will include diagnostics as the application attempts to detect a drum module. In the screenshot above, it’s detected my TD-17. If no known module is detected, the second row of buttons will be disabled.

“Offline” functionality (no drum module required)

Even without a drum module, you can still load and save files, and edit the data.

Click on “Load file” to load a file. The application will detect whether it contains data for a whole module or a single kit, or instrument audio, and display the appropriate window, as described later. A sample file (td17.vdrum) is provided with the application. (If you run the Windows installer, the file is installed in ‘Program Files (x86)\VDrumExplorer’ - I know that’s a little odd as it isn’t a binary, but it simplifies things while I’m learning about Windows installers and WiX.)

Click on “Save log file” to simply save the contents of the log (as displayed in the Module Loader) to a text file. This is primarily to make it easy to report issues. Note that this single log is used for all logging, including for log entries created by other windows.

“Live” functionality (drum module on and connected via USB)

If a module is detected, you can load data from it with the two buttons in the second row:

When loading a single kit, the value in the “Kit number” textbox should be an integer between 1 and 100. (If other modules are ever supported, this range may vary.)

Loading a single kit is reasonably quick - a few seconds - but loading the complete module data takes about three minutes for the TD-17, and longer for the TD-27, TD-50 or TD-50X. You’ll see a progress dialog like this:

Module loading dialog

You can cancel at any time, but I strongly recommend that if you wait until the complete module data has loaded, you then save it to a file so you can load that next time.

Module Explorer

The Module Explorer allows you to view and edit almost all the data in a module. (There are some aspects that aren’t available, such as sample data.)

Information is presented in a tree view, with details of the currently selected tree node in a panel on the right hand side. Initially, the explorer is in read-only mode.

Module explorer in read-only mode

If no drum module was detected when the application was loaded, or if the module isn’t the same as the source of the data being shown in the explorer (e.g. you have a TD-17 but you’re exploring TD-50 data), the second row of buttons will not be present.

Edit mode

Click “edit mode” to enable editing. You stay in edit mode even if you change tree nodes, so you can edit multiple aspects at a time.

Module explorer in edit mode

It’s important to understand that when you’re in edit mode, you’re only editing the data in memory. Nothing is automatically saved to a file, or copied to the physical drum module. Those actions have to be taken explicitly.

To leave edit mode, you can click on either “Commit changes” or “Cancel changes”. (This still only makes a difference to the data in memory.) If you click on “Cancel changes,” all the changes you made in edit mode are reverted. If you click on “Commit changes” you’ll see the changes you made in read-only mode.

Playing a note

When a drum module is connected and an instrument is selected, the “Play note” button is enabled. This is intended to provide a convenient way of experimenting with the settings you’re editing, but its functionality is fairly crude: it just tells the module to play the selected instrument, as specified in the MIDI settings for the kit.

Use the “attack” slider to simulate hitting the drum hard or softly.

In particular:

If you don’t hear anything, check the MIDI channel used by your module. The application defaults to 10, which is the default channel for the TD-17.

Copying data to the device

The “Copy data to device” button will copy all the information from the currently selected tree node and all child nodes, onto the device. This can be very quick if you’re copying a single instrument; copying a whole kit takes a bit longer. Copying the entire module data (from “Root” downwards) will take a very long time.

Note that in edit mode, the data copied is what you currently see, including any changes you’ve made.

Kit context options

Right-clicking on a the root node of a kit within the tree will open a context menu like this:

Kit context menu

This currently provides four options:

For the second of these options, a dialog box opens asking you which kit you would like to copy the selected one to:

Kit copy selection dialog

Saving to disk

The File/Save menu item allows you to save the whole module data to a .vdrum file, which can be opened later in Module Loader.

Kit Explorer

Kit Explorer works very similarly to Module Explorer, except it operates on a single kit instead of the data for a whole module.

Kit Explorer

Copying the kit to the device

The “Copy kit to device” button will copy the kit data to the kit specified in the textbox. (This must be a valid kit number for your module.) In Kit Explorer, the whole kit data is always copied, rather than just information from the selected tree node.

A kit file has a “default kit number” which is used to populate this textbox on loading. This number starts off as the original kit that was taken from the module, but can be modified with the “Default kit number” textbox. Typically you’d want to set it to the number that you most often use on the device for that kit.

Saving to disk

The File/Save menu item allows you to save the kit to a .vkit file, which can be opened later in Module Loader.

Instrument Audio Explorer

Playing an instrument within the Kit Explorer or Module Explorer requires you to have the module connected, with the right instrument on the currently selected kit. That makes it hard to edit a kit on the move, unless you know exactly what each instrument sounds like.

V-Drum Explorer allows you to record all the instruments from your module via the audio connection to your computer, save the data to a file, then load the file again later to allow you to play each instrument without the module being present.

Recording instruments

To take advantage of this functionality, first you need to record the audio data. Start V-Drum Explorer with the module connected and turned on, then click on “Record instruments” in the Module Loader.

The instrument recording dialog will be displayed:

Instrument recording dialog

Before recording, there are some things to check:

Once you’re ready, click “Start recording”. Importantly, you need to leave the drum set alone at this point: if you change settings on the module, or strike the pads, you could end up with undesirable results.

Note: Recording all the samples takes a long time, particularly on the TD-50/TD-50X with over 400 instruments or the TD-27 with over 750! As well as the recording time itself, there’s a little overhead while the instrument is changed etc. So on a TD-50, recording 2.5s of audio per instrument could take over 20 minutes. Please be patient! (The progress bar will show you how it’s doing, of course.)

The process works as follows:

The last part about data restoration can fail in some situations - for example if you disconnect the USB cable while recording. For this reason, I recommend backing up the kit first if you’ve made any modifications to it, or (preferably) using a kit you haven’t modified.

When recording is complete, the dialog will close automatically.

Opening the Instrument Audio Explorer

In order to open the Instrument Audio Explorer, click on “Load File” in the Module Loader and open a previously-saved audio recording .vaudio file. This will open up the Instrument Audio Explorer:

Instrument Audio Explorer

Select an output device from the drop-down (“Speakers (Surface Dock)” in the screenshot above) and then click on one of the instrument groups on the left hand side. The recorded instruments will be shown on the right hand side, with Play buttons. Clicking on a Play button will play the recorded sample from the file.

Note that you can have an Instrument Audio Explorer window open at the same time as a Kit Explorer or Module Explorer window, and this is the recommended approach if you’re trying to work out which instruments to include in a new kit.

Quality note: When developing the feature, some recordings ended up being cut off when playing back. This is definitely a problem with the recording side rather than the playback side. I believe I’ve fixed it, but I can’t be sure. It’s most noticeable on percussion and sound FX instruments. If you run into this problem, please let me know ( - you may well find that just re-recording the file fixes it, but I’d like to know anyway. (And apologies in advance.)

Further work

Version history

Version 1.0.0-alpha14 (2023-03-12)

Version 1.0.0-alpha13 (2023-02-17)

Version 1.0.0-alpha12 (2023-01-09)

Version 1.0.0-alpha11 (2021-11-12)

Version 1.0.0-alpha10 (2021-11-03)

Version 1.0.0-alpha09 (2021-11-02)

Changes since 1.0.0-alpha08:

Version 1.0.0-alpha08 (2021-10-30)

Changes since 1.0.0-alpha07:

The TD-50X support may well be entirely broken; I can’t test it personally. The schema launches in the schema explorer, but that’s all I can say about it right now.

Version 1.0.0-alpha07 (2020-08-22)

(The Aerophone Mini doesn’t have a MIDI implementation document, so this is all based on observed values after modifying the configuration using the app. There’s all kinds of oddness that I haven’t tried to address yet. I’ve no idea what happens if you try to set things that should be read-only, like the version number. Custom fingering is only present for “fingering 1” because the UI for it is basically not there yet. But hey, it’s a start…)

Version 1.0.0-alpha06 (2020-08-11)

This is the first version with a complete new user interface implementation. While much of it looks the same as previous versions, it’s all changed under the hood - which means there may well be some bugs lurking. On the other hand, there are plenty of new features too:

Version 1.0.0-alpha05 (2020-05-24)

There are some known schema issues in the TD-27 schema which are addressed in the new codebase but not here (as keeping track of things in both places is really tricky).

This is likely to be the last release of the “old” code, as the “new” code is approaching feature parity.

Version 1.0.0-alpha04 (2020-03-28)

Version 1.0.0-alpha03 (2020-03-01)

Version 1.0.0-alpha02 (2019-10-03)

Version 1.0.0-alpha01 (2019-09-27)

Version 0.1, 2019-09-15

Initial release after private testing