Which Android app can help in recording only a custom audio from speech?
I'm not sure what you mean by "custom audio", but Smart Voice Recorder will record audio on an Android device.
To record the a-ha moments of a talk while negating remaining audio of speech ( like for eg., Cogi app )
what you want to do exactly you can start stop recording speech anytime, if you have multiple audio files then you can attach them?
Thanks. Please tell which apps can help to easily edit or crop audio into a new audio file on Android
there are few application for android
Android Audio Editor
WavePad Free Audio Editor
Trim & Tone