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• Not so easy

  dsagman • 2 days ago • 1 comment

  OK, I've got a button working, and recording working, but when I try to do playback I get:  terminated by signal SIGSEGV (Address boundary error)

  I think the problem may be that I am somehow starting the pedalmaster main program at the same time and they are conflicting. So maybe not my code. 

  Here's the code, and I have button wired up to GPIO pin 2.

  # Looper. This is test code that:
  # on GPIO connected button press: starts a recording
  # second press: stops listening and plays a loop of the recording
  # third press: stops looping and returns to initial state
  #!/usr/bin/env python3
  from gpiozero import Button
  from signal import pause
  import pyo
  import os
  
  s = pyo.Server().boot()
  s.start()
  audio = pyo.Input()
  loop_file = os.path.dirname(os.path.abspath(__file__))+'/myloop.wav'
  times_clicked = 0
  
  def looper_func(key):
      global times_clicked, rec, looper, audio, loop_file
      if times_clicked == 0:
          print("Recording")
          rec = pyo.Record(audio, filename=loop_file, fileformat=0, sampletype=1).out()
      if times_clicked == 1:
          print("Looping")
          rec.stop()
          looper = pyo.SfPlayer(loop_file, loop=True).out()
      if times_clicked == 2:
          print("Waiting")
          looper.stop()
      times_clicked = (times_clicked+1)%3
      print(times_clicked)
  
  switch = Button(2)
  switch.when_pressed = looper_func
  
  pause()
  

• Added Test Files to Github

  dsagman • 2 days ago • 0 comments

  While trying to make this work, I came up with a lot of ideas and most of them didn't work. I made a lot of test programs and in the event that any of them might help, I've uploaded them all to the github repository.

  https://github.com/dsagman/guitarpedal

• Working on the Looper

  dsagman • 3 days ago • 0 comments

  I'm working on the looper. Step one is to try to get a program where I can:

  1. press a key to start recording
  2. press a key to start looping (and stop recording)
  3. press a key to stop the looping and wait to start over again at 1 with next key.

  I've managed to do that here:
  

  https://github.com/dsagman/guitarpedal/blob/main/keypress.py

  It was trickier than I expected. There's some oddities with the callbacks and pyo objects and the audio player not working if it was outside of the callback function. No idea why. But it works on my linux machine and now I need to get it working on the raspberry pi.

  
  Next steps are to get it working as part of the existing pedal program and to wire it up to a button attached to a GPIO pin. I'm hoping to get an LED that blinks while recording, steady while looping, and then off when not active.
  

  
  Maybe easy. maybe not so easy.
  

• New Video

  dsagman • 3 days ago • 0 comments

  Overly long video on every code line. 

• Trying to record info on the code

  dsagman • 3 days ago • 0 comments

  I've downloaded the OBS software for recording my computer screen and audio input. I'm going to try and do a code review video, but, as always, there's another tool to learn and figure out. That said, OBS seems quite good. Fingers crossed. Including the one I electrocuted the other day.

• Team

  dsagman • 3 days ago • 0 comments

  I had done a lot of the work here with my guitar teacher, Ben McMunn, who I've now figured out how to add to the project. Ben is building his own version using a raspberry pi 2. I'm going to try and get him to upload his photos here.

• Chatroom is now public

  dsagman • 3 days ago • 0 comments

  I just figured out how to make the chatroom public. I hadn't realized it is private.

• updates

  dsagman • 07/22/2022 at 20:20 • 0 comments

  Updated the Python code to fix for the fact that I wired all the pot backwards. Updated code on Github.

  Also, working on making a looper effect. I've got a button working, but now have to figure out how to record the audio and play it back in a loop!

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