Easy way to create AudioGrams, ideally with waveform & Subtitles / Closed Captions with progressing marker on them? Free to start with?
Setting up an automated pipeline for this would take days for a trained person, weeks for someone who doesn't work in the industry. I would recommend you use After-Effects for those motion-graphics. Trapcode sound-keys has very good possibilities for audio-spectrums and wave-forms. Animating the text and highlighting it, karaoke-style would be quite easy. However, both After-Effects and Trapcode (by Red Giant) come with a cost.