Category: interactive media art

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Google speech API v2

notes

update 5/17/2014: The key in the post below is now disabled. Trying this one: AIzaSyBOti4mM-6x9WDnZIjIeyEU21OpBXqWBgw 

It worked for now – but I will probably need to get a real key… and add instructions for inserting the key into the patches: robot_conversation5.maxpat and speech-to-google-text-api5.maxpat

Basic instructions are

  • edit Max patch
  • go into the sub patch: call-google-speech and replace the key string inside the curl command with the correct key.
earlier post

v1 API of Google Speech broke a few days ago.

Here is an example of how to run v2. https://github.com/gillesdemey/google-speech-v2

I have updated the Max patches in the Internet Sensors project. https://github.com/tkzic/internet-sensors

This version of the API produces malformed JSON responses.

Here’s an example using curl:

curl -v -i -X POST -H “Content-Type:audio/x-flac; rate=16000” -T /tmp/tweet.flac “https://www.google.com/speech-api/v2/recognize?xjerr=1&client=chromium&lang=en-US&maxresults=10&pfilter=0&xjerr=1&key=AIzaSyCnl6MRydhw_5fLXIdASxkLJzcJh5iX0M4”

Instructions for getting a real key…  http://www.chromium.org/developers/how-tos/api-keys

Note: Need to look at the double buffering methods in the Max patches to make sure they are handling various sample rates properly. I think they may be optimized for 44.1 KHz

 

 

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ep-4yy13 DSP – week 13

“I think its just the biggest conceptual art project uninentional or otherwise that anyone ever made. it puts Christo and those other guys to shame. Its planetary”

Roman Mars “Episode 97 – Numbers Stations” from 99% Invisible

Radio

  • Measuring the invisible
  • What is the difference between sound waves and radio waves?
  • What is an antenna?
  • Wave propagation is frequency dependent
  • Sunspots and magnetic fields http://spaceweather.com
  • Extreme frequencies, negative frequencies?

examples

Internet radio streams and recordings

Frequencies and modes
  • Macbook trackpad: Noise 5 mHz. (try holding radio near screen too)
  • Macbook AC adapter: Noise 600-1400 kHz. (~1000)
  • AC adapters, LED’s, Utility poles: 3.2 Khz
  • Arduino transmitter: AM 1330 kHz.
  • Laser light at 650nM
  • Wireless micorophone (Orange-brown): Wide FM 614.150 MHz. (R band)
  • Cordless phone: Narrow FM 926 mHz.
  • Cell phone: Digitally encrypted trunking FM 836 mHz.
  • Wifi: Digitally encoded PCM 2.4 gHz.
  • FM broadcast band: Wide FM 89.7 mHz (Raspberry Pi example 98.1 Mhz)
  • TV audio 600 mhz/660 mhz FMW
  • The sun http://www.ips.gov.au/Solar/3/4

Topics not covered

(due to snow and stuff)

Visualization

 

  • d3
  • processing
  • jitter
  • hardware control

Statistics

Miscellaneous

Assignment

Please send me a copies of your earlier compositions. Have a prototype ready to demonstrate or talk about for the next class.