SpeakJet vox
Firmware
Quick user instructions
⚠️ make sure to orient the module as shown in the image gallery
Phoneme
The user can use the rotary to choose a group to play: Vowels/Voiced/Voiced Stop/Voiceless/All Allophone/All Effects/DTMF
Using the switch position to set the priority to:
- the gate signal. The gate going high will trigger the speech and it will be stopped with the gate going low (Gate mode). try to play with the duty cycle of the gate or the clock signal.
- optimized transitioning (Queue mode). Play with the Speed function to fill up the buffer and ear the transition work. The green led and the AUX jack will turn on and off reflecting the buffer half-full status.
- to the allophone timing itself (Speech mode)
Number
There are three modes to generate numbers: CV controlled, Looping or Random.
SD DIC
The code will read a phonetic file and allow the user (or the code in the loop and random mode) to choose a line from that file.
Example of the file content:
along: \UX \LO \OH \OH \SLOW \NGO alpha: \AY \LE \FAST \FF \UX alphabet: \AY \LO \FAST \FF \FAST \AX \STRESS \SOFT \BE \EY \SLOW \TT already: \AW \LE \FAST \RR \EY \DE \IY also: \SLOW \AW \SLOW \LO \SLOW \SO \OWWW although: \FAST \OH \SLOW \LO \DH \SLOW \OWWW always: \SLOW \AW \LE \WW \EYIY \SLOW \SE
User control
The potentiometer P1-P5 affects the pitch, rate, bend, repeat, and volume.
While playing with the interface, the display contextually shows the information about the changes made (rotary, switch, and potentiometers)
A long click brings the user back to the main menu.
A double click in the SD DIC mode brings the user to the file selection menu.
There is a screen saver that will activate after 10 minutes. Turn the rotary to reactivate the display.
Midi control
- Channel filter
- MIDI note ON to play a phoneme
- Velocity
- Pitch
- Speed (CC 5 – Portamento time)
- Bend (CC1 -Modulation)
SD Card
Here are some files to get you started …
Phonetic files
Some dictionnaries to help you building your own speech files
135400 Words in phonetic for SpeakJet (CMUDict)
Ableton MIDI Effect Rack
You can also sequence the chip by sending phonemes from the piano roll





