Audiobook Recorder

This is a small program I wrote for recording audio books.

It's unlike most audio recording software, because:

• It operates in manually created chunks
• Chunks are trimmed automatically
• The whole lot can be joined together with room noise between each chunk
• The most recently recorded chunk can be deleted and re-recorded

The operation is simple enough:

1. Load the program optionally giving it an ALSA device name (-d hw:GoMic) and a session name (-d "Chapter 1").
2. Press N to record 5 seconds of room noise (silence) and begin the session.
3. Hold R to record a new chunk.

If you provide a name, and the file name/room-noise.wav already exists, you automatically continue the existing session.

Pressing D deletes the most recent chunk.

Each chunk is saved in a file name/segment-nnnn.wav and is automatically trimmed to give around 0.1s of room noise before and after each chunk.

Pressing C will export the whole lot with 2 seconds of room noise at the start, then 1 second after each segment. The results are saved as name.wav.

P will record a 0.1s pulse of 48kHz tone to be used as a marker within the audio. Ideal for marking chapters.

Q quits.

Command line options:

-n <name>                  Specify a name for the session.
                           Also used to resume an existing session.

-d <device>                Specify the ALSA device to record from.
                           Note: it *must* support 48000Hz recording at the moment.

-r <dir>                   Where to save recordings to.  Defaults to
                           $HOME/Recordings

-f                         Enable fullscreen at 320x240

-b                         Enable GPIO button support

The last two are intended for running on a 2.1" TFT screen on a Raspberry Pi.