pmeas Goto Github PK

The Portable Multi-Effect Audio Software system is a sound modulator that takes in an input from an instrument and applies effects to the audio stream before sending it to a speaker system. It utilizes the Pyo library to apply the effects.

This is one component of several components that comprise the PMEAS system. Find the other components here.

The system currently modulates audio with the following seven effects:

• Distortion
• Delay
• Chorus
• Reverb
• Flanger
• Harmonizer
• Frequency Shift

The system also implements a multi-track looper through the help of a optional GPIO button.

This backend application is designed to be run on an embedded device, but can also be ran on the same device as the frontend.

Through the help of Python, we are able to support all Linux based distrbutions, as well as all operating systems that support the JACK audio server, even though we only focused exclusively on supporting the Raspberry Pi.

• Python 2.7.13
• Pyo 0.7.3
• JACK Audio

• Raspberry Pi with Wifi
  • Raspbian Jesse
  • Any GPIO Button, ( Used for multi-track looper )

1. Clone this repo to a local directory.
2. Run the install script sudo ./install.sh to download all necessary dependencies and register the service with systemd.
3. Plug the instrument to be played into a USB port on the modulation device.
4. Plug the speaker that will be used to project the modulated audio into the 3.5mm jack port on the modulation device.
5. Start the PMEAS service by calling sudo systemctl start pmeas.service.
6. To enable the optional loop machine functionality, follow the instructions outlined in the GPIO Installation Guide

(The service will also start independently on boot of the system. Just ensure the instrument and speakers are plugged into the ports)

• Application crash