Pi VU Meter
ALSA Plugin to display a VU meter on various Raspberry Pi add-ons
Installing
Currently, you will need to compile the pivumeter lib from source.
You may use our automated setup to do so, specifying the output device the wish to use (see options below):
setup.sh blinkt
if you'd rather compile and set things up yourself, read on!
pre-requisite
sudo apt-get install build-essential autoconf automake libtool libasound2-dev libfftw3-dev wiringpi
clone repository
if you haven't done so already, git clone this repository and cd into it:
git clone https://github.com/pimoroni/pivumeter
cd pivumeter
compiling from source
from the top of the repository, run the following to generate the MakeFile:
aclocal && libtoolize
autoconf && automake --add-missing
then, to compile and install:
./configure && make
sudo make install
Options
Pi VU Meter supports various options in your /etc/asound.conf, these include:
output_device
Specify which device to display the VU meter on.
Supported devices:
- default (18-segment VU driven by SN3218)
- blinkt - Simple amplitude meter through Green->Yellow->Red
- speaker-phat - Simple amplitude meter
- scroll-phat - displays 11-band FFT-based EQ
brightness
Specify the pixel brightness from 0 to 255
Example
pcm_scope.pivumeter {
type pivumeter
decay_ms 500
peak_ms 400
brightness 128
output_device blinkt
}
a full example of a suitable asound.conf file can be found in the dependencies directory.