Use dimhoff/ti99_4a_tape_decode to extract .dat files from audio recordings. On error, use Audacity as a means to remove the corrupted part.
Use the following bash line to bulk dump BASIC code from the .dat files.
To use the dump in an emulator, the .dat files need to be converted back to a proper audio recording.
Control the re-encoded file for example with JS99’er, a JS-based emulator. Chromium works better then Firefox. Chose the BASIC version. Load the .wav file under Tapes. Then initiate the loading process with.