20170607

Maisie Williams in 2016.

[…] we should stop calling feminists ‘feminists’ and just start calling people who aren’t feminist ‘sexist’ – and then everyone else is just a human. You are either a normal person or a sexist

Notes to self: Hammeradio operates with scheduled scripts. Access schedules with crontab -e, look for scripts in /home/pi/Desktop/. The entry @reboot /home/pi/Desktop/startupfm.sh launches sudo arecord -fS16_LE -r 22050 -Dplughw:1,0 -c 1 - | sudo /home/pi/PiFmRds/src/pi_fm_rds -audio - -rt Hammeradio & on startup. PiFmRds begins broadcasting at 107.9 MHz. The contab entry 0 */4 * * * /home/pi/Desktop/akustamatashutdown.sh waits for four hours before it runs the script (sudo shutdown). With top you can see active processes. PiFmRds shows ~24.5% CPU and arecord ~4.6%. vcgencmd measure_temp shows a steady 49.4°C temperature.

20170522

Making the “Hammeradio” launch FM broadcast by scheduling tasks with cron. @reboot /home/pi/Desktop/startupfm.sh works well. It launches sudo arecord -fS16_LE -r 22050 -Dplughw:1,0 -c 1 - | sudo /home/pi/PiFmRds/src/pi_fm_rds -audio - -rt Hammeradio & I’ll also schedule a daily power off cycle for the device. I’ll set it to work during gallery open hours 14:00 to 18:00 (with a Lunch break in the middle). Found an old amplifier circuit I build (while learning to solder to make the WSG) and I’ll test it with the piezo mic I have handy (It would save the iRig pre-amp I bought).

20170519

I got PiFmRds to work on my RasPi3.

Note to self:

1. Use Etcher to flash Raspbian.
2. Enable ssh in RasPi using Terminal
cd Volumes
cd boot
touch ssh

3. Boot RasPi3, login via ssh
4. Set new password
passwd
5. Set locale
raspi-config
6. Install sndfile library
sudo apt-get install libsndfile1-dev
7. Install PiFmRds
git clone https://github.com/ChristopheJacquet/PiFmRds.git
cd PiFmRds/src
make clean
make

8. Broadcast from usb audio in at 107.9FM in mono 22050
sudo arecord -fS16_LE -r 22050 -Dplughw:1,0 -c 1 - | sudo ./pi_fm_rds -audio - -rt Hammeradio
9. End broadcast
sudo pkill pi_fm_rds

Fiddled with PiFmRds settings (I want it to display Hammeradio as radiotext (RT) but I’m not sure if it’s working). I also want to run a .sh script on boot to launch pi_fm_rds broadcast (aka. step 8). Currently launching the pi_fm_rds from /etc/rc.local. Tomorrow I’ll try to build a cron startup schedule so that I can spare the Hammeradio preamp from excess stress by powering the system down on gallery off hours (I have to use a preamp to connect a piezo mic to the RasPi). Other useful resources for future tightvnc manual.

Installed Sea Change: In the Scale of a Horse (2017) by Otto Karvonen feat Trans-Horse installation at Vuotalo. The installation consists of a performance documentation, a custom horse blanket with an embroidery with the text “Helsingin kaupunki – Kaupunkimittausyksikkö” and horse-gear used by Toivottu Poika during our HKI-TKU-HKI riding trip in 2014.

20160509

We met with the “In the Flow” reading circle last evening. Quotes to remember: “…Russian avant-garde art was not directed against the status quo, against the dominating political and economic power structures. The Russian avant-garde of the Soviet period was not critical but affirmative…” Groys on postrevolutionary art in Russia and “Only dull and impotent artists screen their work with sincerity. In art there is a need for truth, not sincerity.” by Kazimir Malevich.

I’ve wasted another day working on the Weird Sound Generator. Replaced every capacitor, added ribbon pins to the wires and resoldered them on board. Double checked the resistor values and pulled out some resistors for testing. Eventually replaced the CD40106 chip.. This returned the voice B Osc.2 but voice A Osc.2 is still missing. I had two chips to begin with and I might have damaged both. During the resoldering session I noticed that a capacitor had been missing a connection from the beginning (because the double sided circuit board I’ve etched is missing connections between sides) and I might have short circuited both chips at some point. I’ll acquire a new chip at some point but I’ll start working on the case now. Working on the board is addictive.

Contacted the Theatre Academy of Helsinki concerning our “Horse and Performance” course which is planned for next fall. They seem excited about our course and apparently students are eager to join register.

Idea: Attach a piezo mic (with a preamp) to hammer and broadcast the audio through the Raspberry Pi radio transmitter (on FM 99.0).