Spectrogram

Visualisation hack for OpenBSD (sndio) and Linux (alsa) playback.

OpenBSD

Install required packages:

pkg_add fftw3

Build:

make -f Makefile.bsd-wrapper

sndiod must be started in monitoring mode (see the Multimedia: Recording a Monitor Mix of All Audio Playback section of the FAQ:)

rcctl set sndiod flags -s default -m play,mon -s mon
rcctl restart sndiod

Build packages: sudo apt install libfftw3-dev libasound2-dev libx11-dev

Audo loopback device: sudo modprobe snd-aloop

Name	Name	Last commit message	Last commit date
Latest commit dim13 Update workflow Jan 7, 2025 993b32e · Jan 7, 2025 History 226 Commits
.github/workflows	.github/workflows	Update workflow	Jan 7, 2025
LICENSE	LICENSE	Readd LICENSE and README	May 29, 2016
Makefile	Makefile	Split OpenBSD/Linux Makefiles (#2 )	Jul 2, 2022
Makefile.bsd-wrapper	Makefile.bsd-wrapper	Updated Makefile.bsd-wrapper to ensure that the math lib gets linked,…	Jan 7, 2025
README.md	README.md	Updated README's OpenBSD instructions for installing required package…	Jan 7, 2025
alsa.c	alsa.c	remove debug messages	Sep 10, 2014
aux.c	aux.c	split and simplify code	Sep 10, 2014
aux.h	aux.h	split and simplify code	Sep 10, 2014
cms.c	cms.c	split code	Sep 10, 2014
cms.h	cms.h	split code	Sep 10, 2014
fft.c	fft.c	update hamming	Sep 10, 2014
fft.h	fft.h	prepare for resize	Sep 10, 2014
sio.c	sio.c	fix free_sio	Sep 10, 2014
sio.h	sio.h	hide internal data format	Sep 10, 2014
spectrogram.c	spectrogram.c	Fix for linux	Oct 17, 2016
spectrogram.png	spectrogram.png	add screenshot	Jul 26, 2019
widget.c	widget.c	reduce duplicate code	Sep 10, 2014
widget.h	widget.h	hide private data	Sep 10, 2014