audio pipeline utility ffmpeg_microphone_live doesn't work in Google Colab
### System Info

Googel Colab 2023/07/21 / Chrome 115.0.5790.114 / macOS 13.5 
Default MacBook microphone

### Who can help?

@sanchit-gandhi

### Information

- [ ] The official example scripts
- [ ] My own modified scripts

### Tasks

- [ ] An officially supported task in the `examples` folder (such as GLUE/SQuAD, ...)
- [X] My own task or dataset (give details below)

### Reproduction

1. make sure microphone works and access to microphone is enabled in Colab
2. follow https://huggingface.co/learn/audio-course/chapter7/voice-assistant


### Expected behavior

Colab cell `launch_fn(debug=True)` should output scores while listening for the wake word as described in the tutorial. Instead, nothing happens. No error is shown and no audio is recorded. This makes the `transcribe` cell in the tutorial crash.
Hey @crcdng! Thanks for flagging this - could you share details of how you achieved step 1 (make sure microphone works and access to microphone is enabled in Colab)? Once I can reproduce I can take a look into how we can get this working!