DAF Jammer
Experiment with Delayed Auditory Feedback (DAF) to jam speech.
Sagebrush Systems Inc · com.sagebrush.stfu
UpdatedNov 8, 2025
PublishedNov 16, 2021
Packagecom.sagebrush.stfu
MD54950933f99d967ee26f99c69c969e8fb
SHA1 (signer)06:AA:C5:53:C4:01:AF:DA:7A:11:B4:1B:83:0D:25:B9:24:A3:D0:CF
Signed byCN=Jim Sells, OU=president, O=Sagebrush Systems Inc, L=Lemitar, ST=NM, C=US
Malware scanTRUSTED
Websitehttps://sagebrush.com
Contact[email protected]
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What's new
Fix timeout system error in service (background operation)
Description
This app is useful for experimenting with the phenomenon of Delayed Auditory Feedback (DAF) to disrupt speech.
DAF might have other uses, involving speech therapy or practicing speeches that will be presented in large venues where echoes are a problem.
The app is currently currently targeted for Android devices with built-in echo cancellation abilities, such as smart phones that support speakerphone features. If you run on a tablet, which typically does not implement echo cancellation, use headphones to prevent runaway audio feedback.
Controls include volume and delay. Adjust the volume to prevent runaway feedback. Adjust the delay for optimal disruption of talking. We find that 150 milliseconds works pretty well. For best results, the phone should be placed as close to the subject's head as practical.
No ads, free, fully functional. Voluntary contribution suggested via in-app billing, with no nags.
DAF might have other uses, involving speech therapy or practicing speeches that will be presented in large venues where echoes are a problem.
The app is currently currently targeted for Android devices with built-in echo cancellation abilities, such as smart phones that support speakerphone features. If you run on a tablet, which typically does not implement echo cancellation, use headphones to prevent runaway audio feedback.
Controls include volume and delay. Adjust the volume to prevent runaway feedback. Adjust the delay for optimal disruption of talking. We find that 150 milliseconds works pretty well. For best results, the phone should be placed as close to the subject's head as practical.
No ads, free, fully functional. Voluntary contribution suggested via in-app billing, with no nags.
Required features
- Bluetooth android.hardware.bluetooth
- Faketouch android.hardware.faketouch
- Microphone android.hardware.microphone
Permissions (11)
DAF Jammer requests the following Android permissions:
- Access Network State android.permission.ACCESS_NETWORK_STATE
- Bluetooth Connect android.permission.BLUETOOTH_CONNECT
- Foreground Service android.permission.FOREGROUND_SERVICE
- Foreground Service Media Playback android.permission.FOREGROUND_SERVICE_MEDIA_PLAYBACK
- Foreground Service Microphone android.permission.FOREGROUND_SERVICE_MICROPHONE
- Internet android.permission.INTERNET
- Modify Audio Settings android.permission.MODIFY_AUDIO_SETTINGS
- Post Notifications android.permission.POST_NOTIFICATIONS
- Record Audio android.permission.RECORD_AUDIO
- Com Android Vending Billing com.android.vending.BILLING
- Com Sagebrush Stfu Dynamic Receiver Not Exported Permission com.sagebrush.stfu.DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION
