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Summary:
Tutorial notebooks that leverage TorchAudio prototype features don't run as-is on Google Colab due to its runtime's not having nightly builds pre-installed. To make it easier for users to run said notebooks in Colab, this PR adds a code block that installs nightly Pytorch and TorchAudio builds as a comment that users can copy and run locally.

Pull Request resolved: https://github.com/pytorch/audio/pull/2325

Reviewed By: xiaohui-zhang

Differential Revision: D35597753

Pulled By: hwangjeff

fbshipit-source-id: 59914e492ad72e31c0136a48cd88d697e8ea5f6c

Summary: Pull Request resolved: https://github.com/pytorch/audio/pull/2288

Reviewed By: hwangjeff

Differential Revision: D35099492

Pulled By: mthrok

fbshipit-source-id: 955c5e617469009ae2600d2764d601d794ee916f

Summary:
https://554729-90321822-gh.circle-artifacts.com/0/docs/tutorials/online_asr_tutorial.html

1. Add figure to explain the caching
2. Fix the initialization of stream iterator

Pull Request resolved: https://github.com/pytorch/audio/pull/2226

Reviewed By: carolineechen

Differential Revision: D34265971

Pulled By: mthrok

fbshipit-source-id: 243301e74c4040f4b8cd111b363e70da60e5dae4

Summary:
Updating the context cacher so that fetched audio chunk is used for inference immediately.

https://github.com/pytorch/audio/pull/2202#discussion_r802838174

Pull Request resolved: https://github.com/pytorch/audio/pull/2213

Reviewed By: hwangjeff

Differential Revision: D34235230

Pulled By: mthrok

fbshipit-source-id: 6e4aee7cca34ca81e40c0cb13497182f20f7f04e

Summary:
* tutorial for streaming API https://541810-90321822-gh.circle-artifacts.com/0/docs/tutorials/streaming_api_tutorial.html
* tutorial for online speech recognition with Emformer RNN-T https://541810-90321822-gh.circle-artifacts.com/0/docs/tutorials/online_asr_tutorial.html

Pull Request resolved: https://github.com/pytorch/audio/pull/2193

Reviewed By: hwangjeff

Differential Revision: D33971312

Pulled By: mthrok

fbshipit-source-id: f9b69114255f15eaf4463ca85b3efb0ba321a95f