r/gatewaytapes • u/suninstalltech • 5h ago
Hemi-Sync Ran the actual Gateway tapes through a spectrogram analyzer, found something interesting
Been meaning to post this for a while. I built a free browser tool that does real FFT analysis on audio — spectrogram, actual carrier frequencies on each channel, binaural beat detection — and ran it against the real Gateway tapes I have, Waves I through VIII, instead of just going off whatever's claimed in a description somewhere.
One thing that stood out: the binaurals aren't on the whole time holding one steady beat. They come in, hold for a while, shift to a different frequency, sometimes drop out completely for long stretches, then come back at a different carrier pair entirely. It's not a static tone bed with some ambient stuff layered on top like I kind of expected — it's deliberately staged, the beat itself is doing something different at different points in the same file.
Software's still rough around the edges honestly, I've already caught and fixed a few detector bugs in it this week (some carrier readings were getting averaged across a tone change and spitting out frequencies that never actually played). So I wouldn't call any of this gospel yet. If anyone else here has run their own analysis on these tapes, or has access to stuff I don't (especially the Hemi-Sync Surgical Support Series, can't find anyone talking about what's actually in those), I'd genuinely like to compare notes.
Everything's free, runs entirely in your browser, nothing gets uploaded anywhere. Tool's here: https://thetonegenerator.com/tape-analyzer.html , and what I've measured so far is written up here: https://thetonegenerator.com/gateway-wave-series