§ Learning code by hearing it

I learnt of this from an amazing discussion on HackerNews, where a sighted programmed, who is going blind, asked the community if he could remain a software engineer. An answer by kolanos read:

You can definitely continue as a software engineer. I'm living proof. ...
For example, as you get better with a
screen reader, you'll be bumping the speech rate up to 1.75-2X normal speech.
... Typos will be easily spotted as they just won't "sound right". It will be
like listening to a familiar song and then hitting an off note in the melody.
And this includes code . Also, because code is no longer represented
visually as blocks,
you'll find you're building an increasingly detailed memory model of your code .
Sighted people do this, too, but they tend to visualize in their mind. When
you abandon this two dimensional representation,
your non-visual mental map suffers no spatial limits . You'll be amazed
how good your memory will get without the crutch of sight.

I find this incredibly fascinating. I think I'm going to try this: I'll listen to lectures on 1.5-2x anyway, so this may work just as well. I'm planning on trying this with the MLIR codebase, which I want to get to know intimately. I'll write updates on how this goes.
Drew DeVault also posted links to tools/scripts for programming without needing visual feedback:

• vimspeak.vim for, if I understand correctly, speaking out loud the current state [which buffer, which mode, what line ], as well as reading out text from the buffer.
• An extension to the Sway tiling window manager for providing audio cues.

I also learnt about emacspeak , which supposedly works well for an audio-based-workflow.

• [https://news.ycombinator.com/item?id=22919455 ]

§ Setting up festival

It seems that festival is the best(?) TTS engine for linux. One should

1. install festival
2. install the voice packs, given by the name festvox-*.
3. The best (?) festival voice is supposedly in the package festvox-us-slt-hts, with voice name voice_cmu_us_slt_arctic_hts. The pacakge is also available at the debian site: https://packages.debian.org/sid/all/festvox-us-slt-hts/download
4. edit the festival config file /etc/festival.scm and add a line

; the ' is important to escape the string
; (set! voice_default ')
(set! voice_default 'voice_cmu_us_slt_arctic_hts)

§ Setting up SVOX pico2wave

• Ubuntu package: sudo apt install libttspico-utils
• Run instructions:

#!/bin/bash
pico2wave -w=/tmp/test.wav "$1"
aplay /tmp/test.wav
rm /tmp/test.wav