Turn your own notes, study material or affirmations into a silent track. Prove the hidden signal is really there, hear it any time with Reveal, and keep your document on your own device.
1 Your words
TXT, PDF or Word (.docx)
0 words
2 Choose the voice
Tap Start, then read the text below at a normal pace.
3 Settings
Standard works on more phones and earbuds. Higher is harder for young ears to notice. Run the speaker check below if you are not sure.
4 Proof it is in there
The spikes on the right are your voice, moved above normal hearing. The left side is the range people hear. It should stay flat.
Keep the file as WAV. Converting to MP3 or sending it through some messaging apps can strip the hidden layer. You can always run it back through Reveal to check.
Speaker check
Plays a few short high tones and listens with your microphone to see which ones your phone or speaker can actually produce. For earbuds, hold one right next to the microphone.
Plans
Free
$0
Up to 300 words
Up to 3 minutes of recording
Proof and Reveal included
Lifetime
$99 $129
Founding price for the first 100 buyers, then $129
One-time payment, unlimited tracks and long documents