Nuts and Volts - September 2017

my finished device so I don’t need a display and keyboard connected. Using SSH allows me to log in from my computer, and control and/or modify the SamplerBox code remotely. To use SSH, you first need to change the I have set up the SamplerBox software so it runs automatically on power-up. To make changes to the software, you must stop the instance that is running, make your changes, and then restart SamplerBox.

Wi-Fi credentials to enable connecting to your Wi-Fi network. After logging into your RaspPi, run this command to begin editing: To stop SamplerBox, you must find its process ID using the following command:

ssh pi@YourIPAddress
ex. ssh pi@192.168.0.214
 ps -ef | grep samplerbox
sudo nano /etc/network/interfaces

You should then see something like: Find the following lines in the file: wpa-ssid CraigNet wpa-psk craigandheather Change them to the SSID (your Wi-Fi network’s name) and password for your Wi-Fi network. When you are finished, hit Control X and follow the prompts for saving your changes. Next, reboot using this command:

root 104 1  0 15:02 ?
  00:00:00 /bin/sh /home/pi/SamplerBox/samplerbox.sh
root 106 104  6 15:02 ?
  00:00:09 python /home/pi/SamplerBox/samplerbox.py
pi 917 900  0 15:05 pts/0
  00:00:00 grep —color=auto samplerbox

The process ID is the number in the second column or (in this case) 104. Next, you must kill that process using:

sudo reboot
sudo kill -9 104

Towards the end of the reboot process, you should now see a line on the display that indicates the IP address assigned to your Raspberry Pi.

You can now edit the SamplerBox Python code using the nano editor by typing: Using an SSH client on your computer, you can now attempt to SSH into your Pi using a command similar to this:

nano SamplerBox/samplerbox.py

After you’re done making your changes, start SamplerBox again using this command:

sudo SamplerBox/samplerbox.sh

Resources

Many versions of the open source SamplerBox code are available on the Internet, including but not limited to:

Author Website Contact Addresses Joseph Ernest www.samplerbox.org twitter: @JosephErnest mail: contact@samplerbox.org Alex MacRae https://github.com/alexmacrae/SamplerBox mail: alex.finlay.macrae@gmail.com Hans Hommersom http://homspace.xs4all.nl/homspace/samplerbox/index.html Erik www.nickyspride.nl/sb2

Sample sets are available from the following locations:

Description Website Free SamplerBox sample sets www.samplerbox.org/instruments A free mellotron sample set www.leisureland.us/audio/MellotronSamples/MellotronSamples.htm Commercial vintage keyboard sample sets www.vintagekeyboardsounds.com A video of a SamplerBox device using mellotron flute sounds playing the intro to Strawberry Fields is available at https://www.youtube.com/watch?v=yz7GZ8YOjTw.

I did a short demo song using my newly built Samplerbox mellotron device. The tune is a cover of a Sting song and is available at www.craigandheather.net/mp3/Fragile.mp3.