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#Morse decoder app for iphone bf4 for android#
#Morse decoder app for iphone bf4 android#
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#Morse decoder app for iphone bf4 Pc#

Higher levels (-20.-1 dBFS) indicate insufficient signal attenuation, ground-loop noise, or other problems. Check the input signal level shown on the status bar above the decoded text, and make sure that it is within -50.-20 dBFS. It is not recommended to connect the audio and USB cables to the phone at the same time since noise pickup may increase greatly due to a ground loop formed by the two cables.

#Morse decoder app for iphone bf4 Pc#

I put the components on a tiny PC board, as shown below, and protected the circuit with a heat-shrink tube. Ironically, the connector alone costs several times more. Such earbuds are sold for less than $1 on Ebay. To build the attenuator, I used resistors salvaged from an old TV, and the 4-contact audio connector was cut from the broken earbuds. I used the circuit shown below to feed the audio from my shortwave transceiver to the phone, with excellent results. To the Mic pins to detect the presence of an external audio source.

#Morse decoder app for iphone bf4 android#

DC decoupling is also often required, in particular, because Android devices

Such signals need to be attenuated to the Microphone level (a few mV) before they are fed to a smartphone. Many consumer electronic devices, as well as Amateur Radio equipment, output the Line-In level signas, about 600 mV r.m.s. I strongly recommend the use of a cable, but if this is not an option, try to place the phone's mic as close to the speaker as possible, to minimize the echo. The tails after every Morse element visible on the first screenshot made decoding impossible, while the audio fed via the cable was decoded perfectly. The second one was taken when the audio was fed to the smartphone through a cable, as described in the next section. The first screenshot was taken with the aduio played back via a speaker and picked up by the microphone, Morse Letters video uploaded by someone to YouTube to test the effect of the echo. Morse Expert can decode audio from the microphone, but acoustic echo picked up by the mic may degrade decoding accuracy, or even completely destroy decoding. Improve word segmentation and highlight the callsigns and special words, as shown on this screenshot: In the latter mode, the app performs extra processing of the decoded text to The Settings screen allows you to switch between the default, General Text mode,Īnd the Ham Radio QSO mode. A second tap on the waterfall disables the frequency lock. A tap on the waterfall display locks the decoder frequency, and the green triangle Frequency Lock Modeīy default, if there is more than one signal in the passband, the decoder switches automaticallyīetween the signals. To copy the file to your PC, connect the phone to your machine with a USB cable. The Save command saves decoded text to the this folder on your phone:Īndroid/data/_expert/files/ Decoding is suspended in the selection mode, tap outside of your selection to resume decoding.

Then use the Selection menu to copy, share or save selected text. Use the selection handles to adjust your selection, Premium Version available: ad-free, user-selected text colorsĪ long-click on the decoded text switches the app to the text selection mode.

#Morse decoder app for iphone bf4 for android#

Decoding is performed using the same algorithms as used inĭownload the program from Google Play by clicking on the button below:Įxpert for Android Google group to discuss the program and request support. The audio may come either from the built-in microphone or from another device, such as a radio, via an audio cable. Optionally highlights Ham callsigns and keywords. Optimized for decoding weak, fading signals in the presence of interference, especially on the Amateur Radio bands.

#Morse decoder app for iphone bf4 Pc#

#Morse decoder app for iphone bf4 android#

#Morse decoder app for iphone bf4 for android#

#Morse decoder app for iphone bf4 code#