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qmk_firmware/docs/stenography.md

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Stenography in QMK

Stenography is a method of writing most often used by court reports, closed-captioning, and real-time transcription for the deaf. In stenography words are chorded syllable by syllable with a mixture of spelling, phonetic, and shortcut (briefs) strokes. Professional stenographers can reach 200-300 WPM without any of the strain usually found in standard typing and with far fewer errors (>99.9% accuracy).

The Open Steno Project has built an open-source program called Plover that provides real-time translation of steno strokes into words and commands. It has an established dictionary and supports

Plover with QWERTY Keyboard

Plover can work with any standard QWERTY keyboard, although it is more efficient if the keyboard supports NKRO (n-key rollover) to allow Plover to see all the pressed keys at once. An example keymap for Plover can be found in planck/keymaps/default. Switching to the PLOVER layer adjusts the position of the keyboard to support the number bar.

To use Plover with QMK just enable NKRO and optionally adjust your layout if you have anything other than a standard layout. You may also want to purchase some steno-friendly keycaps to make it easier to hit multiple keys.

Plover with Steno Protocol

Plover also understands the language of several steno machines. QMK can speak a couple of these languages, TX Bolt and GeminiRP. An example layout can be found in planck/keymaps/steno.

When QMK speaks to Plover over a steno protocol Plover will not use the keyboard as input. This means that you can switch back and forth between a standard keyboard and your steno keyboard, or even switch layers from Plover to standard and back without needing to activate/deactive Plover.

In this mode Plover expects to speak with a steno machine over a serial port so QMK will present itself to the operating system as a virtual serial port in addition to a keyboard. By default QMK will speak the TX Bolt protocol but can be switched to GeminiRP; the last protocol used is stored in non-volatile memory so QMK will use the same protocol on restart.

Note: Due to hardware limitations you may not be able to run both a virtual serial port and mouse emulation at the same time.

TX Bolt

TX Bolt communicates the status of 24 keys over a very simple protocol in variable-sized (1-5 byte) packets.

GeminiRP

GeminiRP encodes 42 keys into a 6-byte packet. While TX Bolt contains everything that is necessary for standard stenography, GeminiRP opens up many more options, including supporting non-English theories.

Configuring QMK for Steno

Firstly, enable steno in your keymap's Makefile. You should also diable mousekeys to prevent conflicts.

STENO_ENABLE = yes
MOUSEKEY_ENABLE = no

In your keymap create a new layer for Plover. You will need to include keymap_steno.h. See planck/keymaps/steno/keymap.c for an example. Remember to create a key to switch to the layer as well as a key for exiting the layer. If you would like to switch modes on the fly you can use the keycodes QK_STENO_BOLT and QK_STENO_GEMINI. If you only want to use one of the protocols you may set it up in your initialization function:

void matrix_init_user() {
  steno_set_mode(STENO_MODE_GEMINI); // or STENO_MODE_BOLT
}

Once you have your keyboard flashed launch Plover. Click the 'Configure...' button. In the 'Machine' tab select the Stenotype Machine that corresponds to your desired protocol. Click the 'Configure...' button on this tab and enter the serial port or click 'Scan'. Baud rate is fine at 9600 (although you should be able to set as high as 115200 with no issues). Use the default settings for everything else (Data Bits: 8, Stop Bits: 1, Parity: N, no flow control).

On the display tab click 'Open stroke display'. With Plover disabled you should be able to hit keys on your keyboard and see them show up in the stroke display window. Use this to make sure you have set up your keymap correctly. You are now ready to steno!

Learning Stenography

Keycode Reference

As defined in keymap_steno.h.

Note: TX Bolt does not support the full set of keys. The TX Bolt implementation in QMK will map the GeminiRP keys to the nearest TX Bolt key so that one key map will work for both.

GeminiRP TX Bolt Steno Key
STN_N1 STN_NUM Number bar #1
STN_N2 STN_NUM Number bar #2
STN_N3 STN_NUM Number bar #3
STN_N4 STN_NUM Number bar #4
STN_N5 STN_NUM Number bar #5
STN_N6 STN_NUM Number bar #6
STN_N7 STN_NUM Number bar #7
STN_N8 STN_NUM Number bar #8
STN_N9 STN_NUM Number bar #9
STN_NA STN_NUM Number bar #A
STN_NB STN_NUM Number bar #B
STN_NC STN_NUM Number bar #C
STN_S1 STN_SL S- upper
STN_S2 STN_SL S- lower
STN_TL STN_TL T-
STN_KL STN_KL K-
STN_PL STN_PL P-
STN_WL STN_WL W-
STN_HL STN_HL H-
STN_RL STN_RL R-
STN_A STN_A A vowel
STN_O STN_O O vowel
STN_ST1 STN_STR * upper-left
STN_ST2 STN_STR * lower-left
STN_ST3 STN_STR * upper-right
STN_ST4 STN_STR * lower-right
STN_E STN_E E vowel
STN_U STN_U U vowel
STN_FR STN_FR -F
STN_PR STN_PR -P
STN_RR STN_RR -R
STN_BR STN_BR -B
STN_LR STN_LR -L
STN_GR STN_GR -G
STN_TR STN_TR -T
STN_SR STN_SR -S
STN_DR STN_DR -D
STN_ZR STN_ZR -Z
STN_FN (GeminiRP only)
STN_RES1 (GeminiRP only)
STN_RES2 (GeminiRP only)
STN_PWR (GeminiRP only)