What's new in V2

IZ2UUF Morse Koch CW version 2 is a complete rewrite of the previous application. Despite of that, to avoid disorienting the current users, a great effort has been spent to maintain the interface operation and layout as close as possible to the previous one.

The new app is now based on a new sound engine that gives a very high control on timing, handles complex sound shapes and allows multiple sources to be mixed.

Thanks to the new engine, the new app has:

• a better sound without the annoying clicks (soft attack/release);
• a perfect synchronization sound/display, allowing text to be shown before or after a programmable time from the related CW sound;
• the possibility of listening sounds with fating, noise, interferences and other disturbing effects;

Main changes

Besides the new engine, there some other major enhancements made to the V2 app:

• Start screen — a new initial screen introduces to the exercise or to the exercise selection page; the same initial screen will be used to evidence new features and other news related to this app;
• Exercise presets — a list of presets allow recalling configurations without having to manually change the settings every time;
• Unlimited playback — the new exercise generation subsystem is now able to generate exercises of virtually infinte length, while in the old app length was limited by the size of an internal buffer;
• Text typeback — the user can now type back with the keyboard the text it has received from the application; the app will check the result and evidence all errors;
• Audio readback — the app can now read back the exercise with the synthesized voice, so the exercise can be quickly verified on the notepad;
• Multilanguage — the app now supports localized interface; translations in various languages are now available;
• New readback voice — new readback voice
• Short voice — now the readback voice can optionally say "A", "B", "C" instead of "ALPHA", "BRAVO", "CHARLIE" and so on;
• New exercises — a set of new exercises like callsign recognition, QSO mode and many others to come;
• International characters — over 100 international characters are now supported;
• Bug fixing — most of the bugs reported have been fixed and a lot of new features requested by the users during these years have been implemented.

Features table

	V1	V2 Free	V2 Pro
Time limited Koch exercises	✔	✔	✔
Settable speed and spacing	✔	✔	✔
Spoken readback voice (alpha, bravo, ...)	✔	✔	✔
Random words exercise	✔	✔	✔
Text read exercise	✔	✔	✔
Custom string	✔	✔	✔
Hard letters	✔	✔	✔
Automatic Koch hard letters	✔	✔	✔
Settable tone pitch	✔	✔	✔
New audio engine with smooth tones		✔	✔
Anticipated/posticipated text printout		✔	✔
Keyboard verification with exercise comparison		✔	✔
Over 100 international characters supported, including Cyrillic		✔	✔
Translation in several languages		✔	✔
Time unlimited Koch exercises (V1 had 1000 characters limit)			✔
Fast spoken readback voice (A, B, ...)			✔
Text-To-Speech readback voice in all languages supported by Android, able to read all words in natural language.			✔
Voice that reads back the exercise to easen checking the results			✔
Callsign recognition exercise			✔
QSO simulation exercise			✔
Save and recall multiple exercise settings			✔
Automatic word repetition			✔
Support of this app development			✔