Prototyping/2019-2020/T3 - XPUB & Lens-Based wiki

Prototyping session Spring 2020, in the context of Special Issue #12: Radio Implicancies

This page is currently being worked on.

In the work for the Special Issue, we will employ a strategy of working between systems

01

Review setup with liquidsoap and icecast from the sandbox to the lurk server.
Review setup of webhook connecting git repo with webpage on sandbox

the colors of noise (using sox to generate white, brown, and pink noise)
liquidsoap fallbacks
mixing diverse sources of material...
working with silence
dynamics compression and loudness

microphones

I AM SITTING IN A (CHAT) ROOM

Listen: Alvin Lucier's I am Sitting in a room

Listen: Janet Cardiff A Large Slow River

http://radio.aporee.org/

COMMAND-LINE AUDIO WORKSTATION

Why does a 8000Hz recording sound different than 44100Hz?
loops to test different sampling rates.... (data)compression loop ?

EDITING

commandline audio editing with ffmpeg...
cutting: extracting chunks with a start / duration
assembling

RIPPING

youtube-dl
ffmpeg to extract audio

bash scripts with loops / variables for audio manipulation
Example: spectrumsort

RADIO

Filtering for radio/streams:
compression (as in Dynamic range compression different from audio data compression
"Loudness" and "Normalisation"... What is replaygain and why can it help?
liquidsoap for sound processing

HRTF

ASMR - HRTF ... https://www.youtube.com/watch?v=3VOLkehNz-8
Spatilsation of Audio: https://www.york.ac.uk/sadie-project/database.html, head-related transfer functions (HRTFs)
CLI spatialisation of audio: ffmpeg headphone, sofalizer

resources:

The materiality of digital audio: samples, sampling rate, sample width, format, channels... See Sound and listening
Playing "raw" and non-sound data ... See Sonification
field recordings @ freemusicarchive
sound art on ubu
William Burroughs: cut-ups + The Electronic Revolution

Question relevant to the special issue: Are we streaming in stereo / mono? At what bitrate... Does it matter?

Exercise

Create an "audio probe": a combination of particular content and a filter that (metaphorically, or literally) resonates

02

VOICE

text to speech / speech synthesis

Specifically the case of [MBROLA](https://github.com/numediart/MBROLA) and the "free" but not "libre" voices. https://github.com/numediart/MBROLA-voices

Espeak + MBrola https://github.com/espeak-ng/espeak-ng/blob/master/docs/mbrola.md

Projects spɛl ænd spik. hellocatfood (antonio roberts) https://www.hellocatfood.com/spell-and-speak/

"real" VOICES http://librivox.org

03

PLAYER

Radio webpage

Audio player (html/js)
guest book cgi??!! (socially determined captcha !)
Player: display metadata (Metadata from icecast? https://stackoverflow.com/questions/6115531/is-it-possible-to-get-icecast-metadata-from-html5-audio-element ) TRY!
Generate podcast/RSS with json + Template (template.py(python+jinja)/makefile)
Stream access (scheduling)

(meta/way of working Publishing via git/githook TRY! )

random access media ?? (can an mp3 do a range request jump? or only ogg ??) depends on server, example of non-random access mp3
ubu audio player as anti-pattern ?!
html5 media fragments, and javascript

04

BOTS

Cross system / bots (2 parts?)

infobot
eliza
mud/moo

Bot / chatroom
Radio stream / schedule
mediawiki API (pull + push) .. example of epicpedia?
etherpad API (pull + push?) .. example of etherlamp (make js version?)

See: https://vnsmatrix.net/projects/corpusfantastica-moo-and-lambda-projects

05

PLEASE Leave a message

https://mdn.github.io/web-dictaphone/ https://github.com/mdn/web-dictaphone/ (+ javascript looping / instrument) ... now how to save / submit ... (
online recording interface... interface with CGI to save/serve files ?
https://developer.mozilla.org/en-US/docs/Web/API/MediaRecorder
https://github.com/mattdiamond/Recorderjs
Angeliki Diakrousis http://radioactive.w-i-t-m.net/

06

gitea webhooks
CGI to receive a JSON post
php to receive JSON post (example on gitea webhooks page)
CGI (making a "helloworld" / printenv with python) See CGI checklist
Don't forget "sudo a2enmod cgi" and "sudo systemctl restart apache2" to enable the cgi module in Apache...