This is an App that decodes Morse code input from the microphone.
It is a Morse practice App that you can use to check if you are keying the correct code.
Signals with good S/N can be decoded correctly, but signals with bad S/N cannot be decoded correctly.
Also, the performance will be degraded for extremely slow or fast signals.
Usually about 5 to 10 characters are required for speed synchronization of Morse Code.
Adjust the input signal so that the peak value changes from level 6 to level 7.
Make fine adjustments to each parameter according to the reception status.

[Control parameters]
1.Language select English and Japanese(KANA)
2.Audio Input Level
3.BPF ON/OFF
4.BPF of Center Frequency
5.BPF of Band Width
6.BPF of Shape
7.Notch ON/OFF
8.Notch of Center Frequency
9.CW Speed Control ON/OFF
10.CW Speed Control Low, Mid1, Mid2 or High
11.Delete All Decoded Text

[Note]
Since the signal after BPF is output to the audio output, it can also be used as an AF-CW filter.

[URL of this App(Free version) working example video]
The GUI is slightly different, but the basic functionality is the same.
https://youtu.be/Pwp7W4m-m34