Recording interviews

Mobile apps

Android has a useful, simple audio recording application built-in since Android 7.

Audio recorder

• an audio recorder for little money (£€30-40).
• a Galaxy Samsung SIII, S4, S5 with the default recorder app from lineageos
• TP8 Telephone Pick-Up to record interviews done via mobile (software solutions are flaky or proprietary)

Audio recorder on GNU/Linux

To record a videoconference https://obsproject.com/

Transcribing interviews

• OTranscribe
  • adb pull /sdcard/Music/SoundRecords /tmp
  • ffmpeg -i SoundRecord-2018-03-29-12-36-18.wav -vn -ar 44100 -ac 2 -ab 192k -f mp3 interview.mp3
  • chromium http://otranscribe.com/

If the volume of the recording is too low, it can be amplified with:

ffmpeg -i interview.mp3 -filter:a "volume=5.0" amplified.mp3