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README.md

⚠️ Currently rewriting from scratch using gstreamer (on the dev branch)

Check out the real-life GTA: San Andreas radio set for an example use of this library

Virtual_FM_Band

A virtual FM band playing simultaneous sounds over virtual frequencies.

                                                                        
Track 0        Track 1        Track 2        Track 3       Track N        
   |              |              |              |             |         
   |--------------|--------------|--------------|---- - - - --|         
                                                                        
   <------------------------------------------------- - - - -->         
                         virtual frequency                     
                                                                        

Technically, it's a mixer with multiple tracks that takes care of the volume of each track (fade in / fade out) while moving along the virtual frequency.

Installation

curl https://raw.githubusercontent.com/raphaelyancey/Virtual_FM_Band/master/install.sh | bash

Read the install.sh script for details.

In a nutshell, it:

  • Installs required packages
  • Clones this repository
  • Installs Python dependencies

TODO

  • Handle streams as input
  • Add static noise between stations
  • Make swmixer play the files in loop
  • Do not play if the file is not to be heard anyway
  • Random start position

List audio device IDs

After installing the required Python packages, execute this script in a Python shell.

import pyaudio
p = pyaudio.PyAudio()
info = p.get_host_api_info_by_index(0)
numdevices = info.get('deviceCount')
for i in range(0, numdevices):
        if (p.get_device_info_by_host_api_device_index(0, i).get('maxOutputChannels')) > 0:
            print "Output Device id ", i, " - ", p.get_device_info_by_host_api_device_index(0, i).get('name')

(inspired by https://stackoverflow.com/a/39677871/2544016)

Troubleshooting

ERROR:root:Couldn't start swmixer:

Make sure you specified the correct device index in the .env file. To list the device indexes, see https://stackoverflow.com/a/39677871/2544016.

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