The best available software to generate stim signals for stereostim is haiyaku365's StimmingSignalGenerator:
https://github.com/haiyaku365/StimmingSignalGenerator
It is built for .Net 8 though which MS ends support for in November 2026, so make sure you install .Net 8 before then in order to be able to use this program.
For Linux you also need to install libopenal1 and then in StimmingSignalGenerator Right click on play/ stop button to select audio API as Open AL.
In StimmingSignalGenerator click on Stereo in the left menu and modify it to make a signal of these characteristics:
Left Channel:
Sin, Freq = 896, Vol = 1.0, ZCP = 0.5
Click Am and +AM below it to add an AM modulation signal:
Sin, Freq = 32, Vol = 1.0, ZCP = 0.5
Click +AM in the coloured box of the first signal but below the different coloured box of the second signal, it to add a second AM modulation signal to the first signal:
Sin, Freq = 1.25, Vol = 1.0, ZCP = 0.5
Right Channel:
Sin, Freq = 864, Vol = 1.0, ZCP = 0.5 (864 is 32 Hz below the left channel base frequency, to create 32Hz interference beats)
Click AM and +AM below it to add an AM modulation signal
Click SyncEnable on that AM signal and link it to Left Signal AM 32Hz then set PShift = 0.5
Click +AM in the coloured box of the first signal but below the different coloured box of the second signal, it to add a second AM modulation signal to the first signal:
Click SyncEnable on that AM signal and link it to Left Signal AM 1.25Hz then set PShift = 0.5
Click play button on Stereo in the left menu and plat button at the top of the window to play this sound.
This will produce on the left channel a 896Hz sine AM by 32 Hz and AM by 1.25Gz, and on the right channel a 864Hz sine AM by 32Hz 90° out of phase with the left AM 32Hz, and 1.25Hz 90° out of phase with the left AM 1.25Hz. The 896 and 864Hz carrier frequencies will together produce a 32Hz interference beat, accentuated by the AM 32Hz signals. The left and right Am signals being 90° out of phase will give the feeling of sensation rocking back and forth between the electrodes.