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With a brand new Teensy, the Jeannie Synthesizer software must be transferred to the Teensy 4.1. For this you need the Teensy Updater ' Teensy.exe' (PC) or Teensy.DMG ( Mac OS X 10.10 and later) and the firmware as an HEX file.

Attention, the firmware is still in beta stage. We are working to improve features and add new ones.

If there are problems with bugs please take the latest stable version.

the Teensy is connected to the computer (Win PC) via a USB cable.
the Teensy.exe programm is started
now press the button on the Teensy,
the arrows ' download and restart' in Teensy.exe light up green and signal that the Teensy is connected to the PC
at the same time, the Jeannie's LCD screen is white.
open the menu 'File , open HEX File' the hex file the ' Jeannie V1.04.XX.hex' and load it with a double click.
now press the 'download' button in the Teensy.exe programme.
the hex.file is transferred to the Teensy.
now press the ' reboot ' button.
welcome to the world of sound , Jeannie is alive
we hope you have fun with the sounds

Transfer now sysex patches / banks with MIOS Studio :

Link to MIOS Studio

Teensy updater Teensy.exe here :

Teensy.exe---(zip)

Jeannie firmware update V 2.19 last stable

- Soundbank SD, Teensy updater PC/MAC and sysex Bank A...E

Date 30.12.22

last stable :>>>V 2.19 please use only this one. Use also all new soundpatches.

Attention: We have made so many changes in the firmware that old patches can sound slightly different.

new oscillator Q-Saw mode with two new parameter.
<Spread> widens the sound of the sawtooth wave by adding up to 4 sawtooth waves.
<Sawmix> changes the volume of the additional waves compared to the main sawtooth wave
sin, tri, rect, saw modulation >>PWM for each oscillator
after touch for different modulation targets
third LFO, modulation also for AM and FX / all LFOs now with 64 waves
bugfixes - 2.07 OK>>2.19 some minor bugs.
Some Q-Saw examples in Bank E 17 and above
Patchtransfer via sysex works now
For Patch transfer via sysex use only the 2.19

the V 2.19 file contains 1) the firmware as a HEX file, 2) round about 384 Sounds in fat for SD ram card in bank A,B,C and a few in D..... and Q-Saw examples in E , Bank A...E in sysex format

Firmware V 2.19 replaces all previous firmwares .

V2.19L hex / SD / sysex

Jeannie firmware update V 1.57 stable

- Soundbank A,B,C

small bugfix . LFO 1+2 phase was not saved in the sound patch

V1.57 hex/sysex/SD