1.3 KiB
winscap 
Windows raw sound output capture tool.
Usage
You tell winscap how many channels and bits to capture at what sampling rate:
winscap <channels> <sample rate> <bits per sample>
winscap will output a raw PCM stream (signed little-endian) to stdout.
Note that winscap uses your audio device in shared mode, so your capture settings
must match the Windows output device. By default, this is 16-bit stereo at 48000 Hz.
If your capture settings do not match, winscap will fail to start.
Building
You need a new enough Visual C++ toolchain. To build, run
nmake
Background
I created this tool as a lightweight approach to run Cava on Windows Subsystem for Linux (WSL) while using sound output from Windows.
To use with Cava, configure Cava to read from a named pipe inside WSL (we'll use
/tmp/cava.fifo in this example) with the following configuration:
[input]
method = fifo
source = /tmp/cava.fifo
sample_rate = 48000
Replace 48000 with whatever sampling rate you use with winscap.
Then, run winscap as follows:
$ /mnt/c/path/to/winscap.exe 2 48000 16 > /tmp/cava.fifo
Again, replace the arguments as appropriate.