MorseDecoder
Translate Morse Code to Text
$9.99
2.5.5for iPhone, iPad and more
6.5
46 Ratings
HotPaw Productions
Developer
1.5 MB
Size
Jun 4, 2021
Update Date
Utilities
Category
4+
Age Rating
Age Rating
MorseDecoder Screenshots
About MorseDecoder
The HotPaw Morse Code Decoder translates Morse Code sound into text. Just use the microphone or headset input on your iPhone or iPad for the audio signal input, and watch decoded text appear.
The Morse Code Decoder includes both an automatic decoding mode, plus manual controls to allow the decoding of weaker signals in noise and QRM. Manually adjustable parameters include the frequency of the audio filter, the WPM dot/dash speed used for detecting characters, the threshold level of background noise, and whether Farnsworth timing is to be used for detecting spaces between individual characters.
The Morse Code Decoder includes a built-in spectrogram to help determine the audio frequency of the Morse Code tones. Use the optional narrow-band DSP audio filter to help filter out background noise. The audio filter works for tone frequencies from 300 to 2400 Hz. Please do not try to decode tones outside this range.
The Morse code WPM (words per minute) detection speed is automatically adaptive from about 8 to 40 WPM, and can be locked to the current estimated WPM dot speed. You can also manually set the WPM code speed if the automatic speed detection guesses incorrectly. A QRQ High Speed WPM mode setting allows decoding much higher WPM speeds in the range of 30 to 80 WPM.
Please aim your iPhone microphone at the Morse Code sound source so that the iPhone's noise cancelling microphone doesn't cancel it out. You can see if sound is getting to the iPhone by seeing a peak in the spectrum display. Please use the manual settings if automatic decoding does not adjust to the frequency, WPM. or background noise threshold level properly. Decoding will not work if the audio filter or WPM are set incorrectly, or there is a lot of background noise or room echoes above the threshold setting. Please see the help file on the HotPaw website for hints as to how to solve decoding issues.
The Morse Code Decoder includes both an automatic decoding mode, plus manual controls to allow the decoding of weaker signals in noise and QRM. Manually adjustable parameters include the frequency of the audio filter, the WPM dot/dash speed used for detecting characters, the threshold level of background noise, and whether Farnsworth timing is to be used for detecting spaces between individual characters.
The Morse Code Decoder includes a built-in spectrogram to help determine the audio frequency of the Morse Code tones. Use the optional narrow-band DSP audio filter to help filter out background noise. The audio filter works for tone frequencies from 300 to 2400 Hz. Please do not try to decode tones outside this range.
The Morse code WPM (words per minute) detection speed is automatically adaptive from about 8 to 40 WPM, and can be locked to the current estimated WPM dot speed. You can also manually set the WPM code speed if the automatic speed detection guesses incorrectly. A QRQ High Speed WPM mode setting allows decoding much higher WPM speeds in the range of 30 to 80 WPM.
Please aim your iPhone microphone at the Morse Code sound source so that the iPhone's noise cancelling microphone doesn't cancel it out. You can see if sound is getting to the iPhone by seeing a peak in the spectrum display. Please use the manual settings if automatic decoding does not adjust to the frequency, WPM. or background noise threshold level properly. Decoding will not work if the audio filter or WPM are set incorrectly, or there is a lot of background noise or room echoes above the threshold setting. Please see the help file on the HotPaw website for hints as to how to solve decoding issues.
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What's New in the Latest Version 2.5.5
Last updated on Jun 4, 2021
Old Versions
Bug fixes.
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Version History
2.5.5
Jun 4, 2021
Bug fixes.
2.5.4
Apr 20, 2020
Added Dark Mode support, plus enhanced compatibility with more recent iOS releases
2.5.3
Mar 3, 2018
Bug fix for text scrolling.
The previous 2.5.2 update extended the range of the audio filter setting.
The previous 2.5.2 update extended the range of the audio filter setting.
2.5.2
Feb 15, 2018
Extended the frequency range of the narrow-band audio filter.
Added a warning when suspected noise is being decoded due to non-optimal settings.
Added a switch to disable the 20 minute auto-off timer.
Minor audio bug fixes.
Added a warning when suspected noise is being decoded due to non-optimal settings.
Added a switch to disable the 20 minute auto-off timer.
Minor audio bug fixes.
2.5.1
Nov 25, 2017
Updated for iOS 11 and the iPhone X.
2.4.1
Nov 13, 2015
This update includes bug fixes for running on the newest iPad devices.
If you have successfully used this app to decode Morse Code, please take the time to give us a nice review: it really helps. Updates to previous reviews are also highly appreciated.
For those users who have encountered problems decoding Morse Code with this app, we have updated and expanded the instructions for using the Morse Decoder app. Please check and configure the settings as needed for your audio input.
If you have successfully used this app to decode Morse Code, please take the time to give us a nice review: it really helps. Updates to previous reviews are also highly appreciated.
For those users who have encountered problems decoding Morse Code with this app, we have updated and expanded the instructions for using the Morse Decoder app. Please check and configure the settings as needed for your audio input.
2.3.3
Mar 18, 2015
Added improvements to Morse Code decoding sensitivity and startup speed.
2.3.2
Nov 5, 2014
Bug fix for an issue with starting the app in landscape orientation on some iPads.
Previous update 2.3.0: Added support for iOS 8 and the iPhone 6 / 6 Plus.
* If the decoder doesn't start recognizing Morse code, please see the new help file on the HotPaw website for important hints on adjusting the radio sidetone frequency, the iOS device microphone position in the room, and the initial WPM.
Previous update 2.3.0: Added support for iOS 8 and the iPhone 6 / 6 Plus.
* If the decoder doesn't start recognizing Morse code, please see the new help file on the HotPaw website for important hints on adjusting the radio sidetone frequency, the iOS device microphone position in the room, and the initial WPM.
2.3.0
Oct 31, 2014
Bug fixes for iOS 8 and the display of some unicode characters.
Added support for iPhone 6 and 6 Plus size devices.
* There may be an issue with starting this update in landscape orientation on some iPads. A fix is in progress.
* Please see the new help file on the HotPaw website for some hints if you can't get the decoder to detect any Morse Code in your audio input. Too high a tone or echoes in the room environment can cause problems with detecting any code.
Added support for iPhone 6 and 6 Plus size devices.
* There may be an issue with starting this update in landscape orientation on some iPads. A fix is in progress.
* Please see the new help file on the HotPaw website for some hints if you can't get the decoder to detect any Morse Code in your audio input. Too high a tone or echoes in the room environment can cause problems with detecting any code.
2.2.6
Apr 24, 2014
Added Dynamic Text font sizing (set in the Settings app:General:Text Size).
Fixed a iOS 7 Microphone Permission issue.
Fixed a iOS 7 Microphone Permission issue.
2.2.4
Mar 27, 2014
Added decoding for a few Morse Code International Extension characters, including à and ñ.
Added a 20 minute delay to screen dimming to improve hands-off decode viewing.
Added a 20 minute delay to screen dimming to improve hands-off decode viewing.
2.2.1
Jan 30, 2014
Version 2.2.1 is a bug fix update for a problem if the Microphone was not enabled.
The previous update, version 2.2.0, added an option to monitor the audio input when using headphones.
Thank you for all the emails and continued support. Please rate and review Morse Decoder if you find it useful (or update your existing reviews)!
The previous update, version 2.2.0, added an option to monitor the audio input when using headphones.
Thank you for all the emails and continued support. Please rate and review Morse Decoder if you find it useful (or update your existing reviews)!
2.2.0
Jan 20, 2014
** Note: This update has a bug which requires you enable the Microphone in the Settings app under Privacy to allow the decoder to run. A fix should be out shortly. **
New:
- Added an optional headphone jack play-thru mode to allow monitoring the audio input.
- Updated icon, plus some small bug fixes.
If you like using this app, don't forget to leave your ratings and reviews in the App store.
New:
- Added an optional headphone jack play-thru mode to allow monitoring the audio input.
- Updated icon, plus some small bug fixes.
If you like using this app, don't forget to leave your ratings and reviews in the App store.
2.1.0
Oct 8, 2013
- Updated for iOS 7.
- You can now use Morse Decoder in landscape mode on an iPhone.
- You can now use Morse Decoder in landscape mode on an iPhone.
2.0.5
May 23, 2013
Fixed a bug in saving the state of the Background Decode enable switch.
New in the previous version 2.0.4:
Added manual WPM speed adjustment on the iPhone for faster decoding start-up. Improved the audio frequency estimator. Added a warning that decoding of high audio sidetone frequencies above 1500 Hz is not supported.
New in the previous version 2.0.4:
Added manual WPM speed adjustment on the iPhone for faster decoding start-up. Improved the audio frequency estimator. Added a warning that decoding of high audio sidetone frequencies above 1500 Hz is not supported.
2.0.4
May 2, 2013
Added manual WPM adjustment when running on an iPhone. Manual adjustment gets decoding started faster when the auto-WPM detection initializes too far from the current code speed.
Added a mode to allow background (display locked) decoding.
Improved frequency estimation.
Added a mode to allow background (display locked) decoding.
Improved frequency estimation.
2.0.0
Feb 14, 2013
Improved the resolution of the audio spectrum viewer.
Improved Auto-WPM-speed tracking.
Improved Auto-volume-threshold tracking and audio filtering.
Added an indication for audio frequencies that are too high for optimal decoding.
Improved Auto-WPM-speed tracking.
Improved Auto-volume-threshold tracking and audio filtering.
Added an indication for audio frequencies that are too high for optimal decoding.
1.9.6
Sep 25, 2012
Added support for iOS6 and the iPhone 5 display.
Bug fixes for setting the sound level threshold.
Bug fixes for setting the sound level threshold.
1.9.4
Jun 14, 2012
Bug fix for disappearing Settings on iPad.
If you find this Morse Code app useful, please leave 5-star reviews and ratings to help support continued development and improvement to the HotPaw Morse Code Decoder.
If you find this Morse Code app useful, please leave 5-star reviews and ratings to help support continued development and improvement to the HotPaw Morse Code Decoder.
1.9.2
Mar 5, 2012
Auto-threshold, AGC and Squelch bug fixes and improvements.
New in previous version 1.9.0:
Added a manual volume threshold to the iPhone version. Tap on the histogram to the left of the waveform to toggle the visibility of this new slider.
Also dded a button to re-initialize auto WPM to the iPhone version. This control will appear only if the WPM speed is unlocked, and will allow you to reinitialize the WPM estimate if you notice that dots are being recognized as dashes, or vice-versa.
New in previous version 1.9.0:
Added a manual volume threshold to the iPhone version. Tap on the histogram to the left of the waveform to toggle the visibility of this new slider.
Also dded a button to re-initialize auto WPM to the iPhone version. This control will appear only if the WPM speed is unlocked, and will allow you to reinitialize the WPM estimate if you notice that dots are being recognized as dashes, or vice-versa.
1.9.0
Feb 20, 2012
Added a manual threshold control to the iPhone version, and improved the AGC in automatic mode.
Added a reset button to the automatic WPM select mode.
Also included some bug fixes.
A manual volume threshold control was added on the iPhone version. Tap on the histogram to the left of the waveform to toggle whether this control is visible or not.
A button to re-initialize the auto WPM speed was added on the iPhone version. This control will appear only if the WPM speed is unlocked, and will allow you to reinitialize the WPM estimate if you notice that dots are being recognized as dashes, or vice-versa.
You can now tap directly on the spectrum graph to enable the audio filter and set its frequency.
Added a reset button to the automatic WPM select mode.
Also included some bug fixes.
A manual volume threshold control was added on the iPhone version. Tap on the histogram to the left of the waveform to toggle whether this control is visible or not.
A button to re-initialize the auto WPM speed was added on the iPhone version. This control will appear only if the WPM speed is unlocked, and will allow you to reinitialize the WPM estimate if you notice that dots are being recognized as dashes, or vice-versa.
You can now tap directly on the spectrum graph to enable the audio filter and set its frequency.
1.8.3
Oct 21, 2011
General bug fixes and a bug fix for iPhone 4s QRQ mode.
If you find Morse Decoder to be useful, please make sure to leave a positive review.
If you find Morse Decoder to be useful, please make sure to leave a positive review.
1.8.0
Sep 28, 2011
Improved CW auto-threshold, AGC, squelch and audio filtering, plus a few bug fixes.
1.7.0
Jun 3, 2011
Added a new High Speed mode in Settings, to support decoding Morse Code speeds from 40 up to 80 WPM.
Also, by popular request, enabled upsidedown use on iPhones to make it easier to aim the microphone, and updated the icon.
Also, by popular request, enabled upsidedown use on iPhones to make it easier to aim the microphone, and updated the icon.
1.6.2
Apr 11, 2011
Added an additional 2kHz audio low-pass filter for better QRM rejection.
Improved WPM measurement accuracy.
Improved WPM measurement accuracy.
MorseDecoder FAQ
MorseDecoder is available in regions other than the following restricted countries:
Suriname,Kosovo,Zambia,Montserrat,Bosnia & Herzegovina,Barbados,Serbia,Cambodia,Nepal,Sierra Leone,Azerbaijan,Bulgaria,Bahrain,Cote Divoire,Macedonia,Niger,Gabon,St. Lucia,Dominican Republic,Nauru,Kuwait,Kazakhstan,Myanmar,Algeria,Guinea-bissau,Iraq,Pakistan,Seychelles,Oman,Namibia,Cameroon,Georgia,Tonga,Swaziland,Uzbekistan,British Virgin Islands,Antigua And Barbuda,Kenya,Kyrgyzstan,Mongolia,Burkina Faso,Guatemala,Croatia,Russia,Yemen,South Korea,Palau,Benin,Gambia,Indonesia,Qatar,Chad,Anguilla,Bhutan,Belarus,Paraguay,Nicaragua,Turks and Caicos,Brunei Darussalam,Luxembourg,Malaysia,Mozambique,Turkmenistan,Lao Peoples Democratic Republic,Afghanistan,Grenada,St. Kitts and Nevis,Mali,Saudi Arabia,Nigeria,Senegal,Trinidad and Tobago,Armenia,Libya,Sao Tome & Principe,Malta,Malawi,Angola,Bolivia,Congo, Democratic Republic,Tanzania,Bahamas,Ghana,Liberia,Vietnam,Micronesia,Thailand,Uganda,Mauritius,Poland,Rwanda,Albania,Cape Verde,Sri Lanka,Montenegro,Congo,Tajikistan,Vanuatu,Zimbabwe,Botswana,Belize,Papua New Guinea,Cayman Islands,Macao,Dominica,Slovenia,Venezuela,Tunisia,Guyana,Honduras,St. Vincent & The Grenadines,Bermuda,Moldova,Romania
MorseDecoder supports English
Click here to learn how to download MorseDecoder in restricted country or region.
Check the following list to see the minimum requirements of MorseDecoder.
iPhone
Requires iOS 12.3 or later.
iPad
Requires iPadOS 12.3 or later.
iPod touch
Requires iOS 12.3 or later.
