/neotrellis-soundboard

A small sound board made from a raspberry pi zero, a neotrellis and a voice bonnet

Primary LanguagePython

neotrellis-soundboard

A small sound board made from a raspberry pi zero, a neotrellis and a voice bonnet

setup

Follow Adafruit instructions on how to set up the voice bonnet (https://learn.adafruit.com/adafruit-voice-bonnet/overview)

After that:

pip3 install --upgrade adafruit-circuitpython-dotstar adafruit-circuitpython-neotrellis
python neotrellis.py

sox

install and record

sudo apt-get install sox

now record with (on Pi4 setting the AUDIODEV env var was not necessary, but on pi0w it was)

AUDIODEV=hw:0 rec test.wav

bandfilter

Remove annoying whine with bandfilters on 1500Hz and harmonics

rec test1.wav bandreject 3000 200 bandreject 1500 200 bandreject 4500 200 bandreject 6000 200 bandreject 7500 200 bandreject 9000 200

Noise filtering

sox test.wav -n trim 0 1.0 noiseprof speech.noise-profile

sox test.wav cleaned.wav noisered speech.noise-profile 0.15

sox and arecord combination

One thing was annoying about recording with sox. Recording something went fine. But immediately playing or recording something after that failed. I had to wait about 4 seconds before a second clip could be recorded. This problem didn't arise when using arecord.

So we record with arecord and filter with sox.

arecord -Dhw:0 -f dat | sox -t wav -b 16 -r 44100 -e signed - -t wav /tmp/noise.wav bandreject 1500 200 bandreject 3000 200 bandreject 4500 200 bandreject 6000 200

run at boot

(omit sudo if you don't want to run python script as sudo)

sudo crontab -e

pick nano

then

@reboot python3 /home/pi/neotrellis-soundboard/neotrellis.py

Setup part 2: usb audio device