title: Undocumented Wavedrum modes
date: 2022-01-24 00:00
tags: DIY, electronics, music, hacking, wavedrum
---


The manual mentions two special modes that can be entered by holding
down buttons while powering on: hold down `Write` while powering on
and you can reset to factory settings; hold down `Mode` while powering
on and you can double the output volume.

The manual does *not* mention these additional modes:

## Information modes

These modes only provide version information before booting up
normally.

- **Hold button 1.** The display shows `SyS`, followed by the version.
  In my case that's `2.02`.  It then proceeds to boot up.
        
- **Hold button 2.** The display shows `Sub`, followed by the version.
  In my case that's `1.10`.  It then proceeds to boot up.
  
- **Hold button 3.** The display shows `dat`, followed by the version.
  In my case that's `2.02`.  It then proceeds to boot up.

- **Hold button 4.** The display briefly shows `InF`, and then cycles
  through the version information that can be obtained with the
  previous three modes.


## Update modes

These modes allow changing the firmware.

- Hold **Write** and **button 1**.  The display blinks `SyS`.  Upon
  pushing *Write* it displays `Lod` followed by a blinking `End`,
  presumably loading firmware.  (From where?)  It is possible to push
  the buttons *1*, *2*, *3*, or *4* to switch between `SyS`, `Sub`,
  `dSP`, and `S_d`, respectively.  But the *Write* button only has an
  effect when `SyS` (button 1) is selected.
        
- Hold **Write** and **button 2**; the display blinks `Sub`.  This is like the
  previous mode, except that `Sub` is selected.
  
- Hold **Write** and **button 3**; the display blinks `dSP`.  This is like the
  previous modes, except that `dSP` is selected.
        
- Hold **Write** and **button 4**; the display blinks `S_d`.  This is like the
  previous modes, except that `S_d` is selected.

Finally, there's the well-known mode to reset to factory settings by
holding **Write** and **Mode** while powering on.


## Test modes

- Hold **button 1** and **button 3**; the display briefly shows `SLF`,
  probably for "self test".  It then shows `SyS`, followed by the
  version number and then lights up all LEDs.  Pushing *Mode* then
  lights up only the LED above the *Write* button.  Hitting *Write*
  advances the LED to the next button, and so on.
        
  When the display is tested, hit *Mode* to get to test the
  *Value* knob; hit *Mode* again to test the *Value* knob's range from 0 to 99; hit it yet again to test
  the range from 0 to 7.  That's all that can be tested here.

- Hold **button 1** and **button 4**; the display shows `Aud.`.  It
  then lights up LED 1 and displays `A.In`, presumably to test audio
  input.  Selecting *button 2* it shows `OFF` and the output goes
  silent.  Selecting *button 3* shows `Pie.`; the signal of the piezo
  sensors is passed straight to the output.  Selecting *button 4*
  shows `ALG.` and you can hear the sounds produced by a simple test
  algorithm when you play the head and rim.

- Hold **button 2** and **button 4**; the display shows `CAL.`,
  probably meaning "Calibration".  It lights up LED 1 and displays the
  current value of the pressure sensor.  When you select *button 2*
  and strike the head, the display shows the corresponding velocity.
  When you select *button 3* and strike the rim, the display shows the
  corresponding velocity.  Hold down *button 3* and you see what seems
  to be an amplification factor.  By default this shows `0.75`.  This
  can be adjusted with the *Value* knob in the range from `0.00` all
  the way to `4.00`.  There does not seem to be a way to save changes.
        
  Selecting *button 4* the display shows where and how strongly the
  drum is hit.

- Hold down **buttons 1, 2, 3, and 4**, and also hold **Mode**; the
  display briefly shows `deb`, which I assume means "debug".  It then
  seems to boot up normally, but upon completion will have entered an
  absolutely bizarre mode where the *buttons 1 and 2* are used to go
  down or up in a list of presets from `01` to `26`; similarly,
  *buttons 3 and 4* are used for selecting one of 26 presets, probably
  for the rim sounds.
  
  The value dial goes from `050` to `500`, but I don't know what value it
  controls.  *Mode* and *button 1* start a constant fast
  automatic trigger of the head.  Hitting the combo again stops the
  automatic trigger.
  
  *Mode* and either *button 2* or *button 3* seems to mute the audio.
  *Mode* and *button 4* mutes all generated sounds and passes the
  unprocessed sound of the piezo sensors through.
  
  I'm not sure what the *Write* button does; pushing it multiple times
  seems to cycle between four different values, but it is not clear
  what they are.  When holding *Mode*, pushing *Write*
  twice selects the next reverb, cycling from `r00` to `r10`.
 

Read [more posts about the Wavedrum here](/tags/wavedrum.html).