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Kaljurand / Diktofon

An Android app, a dictaphone with Estonian speech-to-text
Apache License 2.0
15 stars 3 forks source link

Add 48kHz support, disable AGC #25

Closed dpocock closed 9 years ago

dpocock commented 9 years ago

48kHz support is common in better Android devices. 48kHz recordings are useful when combining multiple audio files from different sources.

Disabling AGC is necessary for making high quality recordings, especially when using external microphones. According to the Android docs, choosing the VOICE_RECOGNITION mode should disable AGC. Some Android devices fail to respect this but it seems to work OK for me.

Kaljurand commented 9 years ago

Thanks a lot for the contribution!

Just for the record, linking the Android documentation relevant to audio pre-processing and the VOICE_RECOGNITION audio source: http://source.android.com/devices/audio/implement.html#preprocessing