• Faithful emulation of the classic vintage Speak and Spell speech chip
• Digitally circuit bent and capable of so much more than in hardware
• Synthesis: formant / vowel / glottal / speech / rhythm / groove / circuit bent / glitch / complex oscillator
• Expansive / feature rich / sophisticated / deep architecture allows you to get inside the speech synthesis chip
and explore this highly unique synthesizer (This ain’t your dad’s spelling machine)
• Around 150 real time parameters, with full stand-alone control and editing using the touch screen and encoders,
or via MIDI over both USB and 5-pin DIN (with user defined thru connectivity)
• MIDI USB HOST port for external controllers / keyboards
• Five GROUPS of (3+3) assignable encoders for instant ‘live’ parameter control via 30 virtual encoders
• MIDI clock master or slave with direct clock sync of Drum triggers, Echo delay time, LFOs, Tempo, and Block Step Morphing
• Additional MIDI clocked scaling options with individual PPQN scalers for Drum Rate limiter, LFOs, Tempo, and Loop Length
• Automation capabilities that enable parameters to randomly DRIFT, and MORPH between patches (with lots of modes)
• Full bidirectional MANUAL MORPH control between any patches with save option at any morph setting
• Powerful Expression Matrix allows every parameter (including MIDI clock BPM) to respond independently to modwheel,
velocity, breath-control, after-touch, and a dedicated expression LFO (XPlfo) modulation block
• Unique modulation blocks that mix twin waveforms selected from ~40 different wave shapes and signal sources each
• Audio rate modulation of amplitude, pitch and speech filter using the “MFO” (Medium Frequency Oscillator)
• Touch Sensor, main rotary encoder, and MIDI note number assignable to expression matrix controllers and much more
• Extensive randomisation possibilities with undo
• Ultra dynamic MIDI Rhythm Generator algorithm improvises drum grooves on-the-fly as it interacts with the synthesis engine
• Over a dozen Drum parameters, with the same extensive control as synth parameters and saved with each patch
• Drum note triggers can be sent to 40 unique built-in drum kits and external MIDI devices, and act as modulation sources
• Ability to also trigger the built-in drum sounds using external MIDI channel 10 note-on events
• Full stereo 44kHz analog and digital USB Audio I/O , stereo overdrive, (fat) resonant Post-Filter, and echo / looper functions
• Store up to 1000 presets with seamless preset switching and morphing
• Store up to 1000 instantly switchable Driftbuffers
• Store up to 1000 SCENES that can capture and recreate complete GND-1T (morphing) states
Vol.2 Factory Loops is a new bank of 100 sounds that make extensive use of the many new GND-1T functions that were added since the original factory bank was released. In GND-1Ts purchased after Sep.4, 2025, they are included at locations 100-199 by default.
These are melodic patches specifically developed to be played using a keyboard or external MIDI notes. They are included in your GND-1T at locations 500-599. However you can choose to put them elsewhere by selecting the appropriate bank in this zip file.
These are the original factory patches 0-100 that ship with the GND-1T. The zip file includes 10 variations so you can choose where you want to save them: starting at 0, 100, 200… 900
These are a small number of firmware V2.0 replacement patches for any pre-installed Vol.1 factory bank patches that used LFO based drum triggers, and have been reprogrammed to use the new internal MIDI clock feature. Sending this SysEx file to your 1T will overwrite patches 22, 25, 52, 66, 75, 81 and 98. GND-1Ts that shipped with FW250325 or later already include these revised patches.
The first factory sound bank #0-99 in your GND-1T contains the original loop and drum examples released in 2024. An additional bank of melodic “keyboard” patches is located at patches #500-599. Vol.2 Factory Loops is a new bank of 100 sounds that make extensive use of the many new GND-1T functions that were added since the original factory bank was released. In new purchases, these sounds are located at #100-199. As with Vol.1, a small number of sounds at the end of the bank are keyboard patches.
Click the Vol.2 button to the left to download a zip file containing 10 variations of the bank, in case you want to relocate the bank to an alternative location. Select the SysEx file corresponding to your preferred bank # and send it to your GND-1T using any MIDI SysEx capable software. To hear Vol.2 sounds as intended*, installation of firmware FW250902 or later is highly recommended.
Similar zip files are available for the original Vol.1 loops, and Keyboard patch banks.
* Vol.2 patches that show an “X” in the top right corner of the Mod FREEZE button use the new cycling modFreeze OSCENV mode (P12 in the user manual). When loaded, they may benefit from a long encoder press to release all excludes if any mod-depths have been manually adjusted since the last excludes release.
NOTE THAT SENDING A SYSEX BANK FILE TO YOUR GND-1T WILL OVERWRITE ANY PATCHES IN THOSE LOCATIONS, SO BE SURE TO RELOCATE THOSE FIRST IF YOU WANT TO PRESERVE THEM.
Power cycling your GND-1T after sending it a SysEx bank is recommended
When viewing the manual, turn on any index/outline options in your viewer to use the clickable index.
The ‘printer friendly’ version is in grayscale, which also more readily shows highlighted search terms
Latest firmware revision V2.18
FW251201 uploaded December 1, 2025.
See the Firmware update info document for details