Zbigniew Siciarz

Switch to `json!` from serde_json instead of json_macros

1

It may be worth switching now that `serde` is so popular. See [`json!`](https://docs.serde.rs/serde_json/macro.json.html).

Tracked in the `serde-0.9` branch. Waiting for https://github.com/softprops/envy/issues/6.

Complete speech recognition example

1

As there is growing demand for a complete speech recognition example using Aquila, we should put together one or more well documented examples.

Zero-crossing detection

2

Add a way toalculate number of zero-crossings in a given signal. This can be useful for example to detect acoustic signals and separate them from silence.

With MFCC done we can now refactor MelFilter to allow for ERB scale as in HFCC.

API docs are back up, but this is not enough. We need to write some technical prose documents, like an overview, introduction, topic guides, some cookbooks etc. Some inspiration: -...

ADSR envelope

1

A useful synthesizer component is Attack-Decay-Sustain-Release (ADSR) envelope. References: - http://en.wikipedia.org/wiki/Synthesizer#ADSR_envelope - [JavaScript implementation in dsp.js](https://github.com/corbanbrook/dsp.js/blob/master/dsp.js#L1119)

We should consider using expression templates for efficient algebraic operations on signals. See: - http://www.linuxtopia.org/online_books/programming_books/c++_practical_programming/c++_practical_programming_132.html - http://stackoverflow.com/questions/414243/lazy-evaluation-in-c

We should move forward and switch to JSONB for exif storage. Also bump required Postgres version higher than 9.4.

Maximum header size for WSGI server

1

Hey there, first of all, thanks for maintaining eventlet! Is there any particular reason, that the maximum header length is 8 kB? It's defined as a constant here: https://github.com/eventlet/eventlet/blob/579c498ae6b9eb67cace82ac60b85fbc442a58e5/eventlet/wsgi.py#L22 Are...