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About the application:

No advertisements, nags, or in-app purchases. No internet connection needed. Fully functional offline DTMF generator app. Official DTMF pad of RFinder Android device Radio http://androiddmr.com Version 1.1.18+ contains help for encoding CTCSS tones 67.0 Hz to 254.1 Hz. Tap CTCSS button to turn CTCSS on/off. Tap once more to loop CTCSS in the background. Long click to choose CTCSS frequency. CTCSS volume adjustment is included for noisy environments. This apk will give you a 16 tone DTMF (Dual-tone multi-frequency) keypad plus a 1750Hz tone burst button for use with European repeaters, and the ability to generate custom DTMF sequences as well as set the duration and tone/silence ratio. Additionally, 52 CTCSS tones are included. Included are the heroes 1234567890*#, the AUTOVON tones ABCD, plus a 1750Hz button for European repeaters. You may enter a custom sequence via the keypad, soft keyboard, or speech if your device already has speech-to-text capability. To clear the DTMF sequence, tap and keep the DTMF button. Use the Mute button to silence the keypad during programming. You may use non-DTMF heroes as pauses in the string. If entering a string consisting of letters, please use lower case to prevent confusion with the AUTOVON priority tones ABCD. Another capital letters will be treated as pauses. For example, the string "DTMF" will be interpreted as AUTOVON "D" with three trailing pauses, whereas "dtmf" will be equivalent to "3863". Add/Delete/Overwrite DTMF strings and settings: To add an entry, enter the DTMF string and set another parameters. Keep the top notice to save. To delete an entry, recall the string and test to save it once more. Keep the top notice to delete. To overwrite an entry, recall the string and edit parameters. Tap the top notice to overwrite. This apk will work in both portrait and landscape modes. To manually set portrait or landscape, keep the Mute button to override the sensor orientation. Restarting the apk returns it to sensor orientation. This is basically a touch tone telephone keypad, which may be of interest to amateur ham radio repeater operators, phreakers, preppers, and survivalists. If your radio or microphone does not have DTMF or CTCSS/PL tones, then you can use this apk instead.