This is a command line tool for recording live audio from high sample rate microphones, including the AudioMoth USB Microphone.
The AudioMoth-Live command line tool is described in detail in the Application Note here.
The following command will write one-minute files at 48 kHz to the local directory files using either the default input or an AudioMoth USB Microphone (if connected).
> AudioMoth-Live autosave 1 files
The following command does the same on Windows.
> AudioMoth-Live.exe autosave 1 files
AudioMoth-Live can be built on macOS using the Xcode Command Line Tools.
> clang -I../inc/ -I../miniaudio/ -framework CoreFoundation -framework CoreAudio -framework AudioUnit -framework AudioToolbox ../src/*.c -o AudioMoth-Live
AudioMoth-Live can be built on Windows using the Microsoft Visual C++ Build Tools. Note that to build the correct version you should run the command in the correct environment. Use the 'x64 Native Tools Command Prompt' to build the 64-bit binary on a 64-bit machine, and the 'x64_x86 Cross Tools Command Prompt' to build the 32-bit binary on a 64-bit machine.
cl /I.\inc\ /I.\miniaudio\ .\src\*.c /link /out:AudioMoth-Live.exe
AudioMoth-Live can be built on Linux using the gcc.
gcc -I./inc/ -I./miniaudio/ ./src/*.c -o AudioMoth-Live -ldl -lpthread -lm -latomic
On macOS and Linux you can copy the resulting executable to /usr/local/bin/ so it is immediately accessible from the terminal. On Windows copy the executable to a permanent location and add this location to the PATH variable.
Pre-built installers are also available for macOS, Windows, Linux and Raspberry Pi here.
The macOS and Windows installers can be double-clicked to start the installation process. The Linux and Raspberry Pi files are shell scripts that can be run from the command line after downloading with the commands:
> sh AudioMothLiveSetup1.0.0.sh
and
> sh AudioMothLiveBuild1.0.0.sh
The Linux version will copy a pre-compiled executable to /usr/local/bin while the Raspberry Pi will compile the executable from the source code and then copy it to /usr/local/bin. Both versions will prompt for the user password in order to complete the copy. The Linux and Raspberry Pi shell scripts can also be downloaded directly from the command line with:
> curl -LJO https://github.com/OpenAcousticDevices/AudioMoth-Live/releases/download/1.0.0/AudioMothLiveSetup1.0.0.sh
and
> curl -LJO https://github.com/OpenAcousticDevices/AudioMoth-Live/releases/download/1.0.0/AudioMothLiveBuild1.0.0.sh
Most Linux releases currently use PulseAudio to allow applications to connect with audio devices. By default, PulseAudio supports all sample rates. However, from Raspberry Pi OS Bookworm onwards, the Raspberry Pi uses PipeWire rather than PulseAudio for audio. By default, PipeWire does note support all sample rates.
You can check the install Raspberry Pi OS with:
> cat /etc/os-release
To allow PipeWire to use all the available sample rates, you need to edit the PipeWire configuration:
> sudo nano /usr/share/pipewire/pipewire.conf
Uncomment and change the following two lines from:
#default.clock.rate = [ 48000 ]
#default.clock.allowed-rates = [ 48000 ]
to:
default.clock.rate = [ 48000 ]
default.clock.allowed-rates = [ 8000, 16000, 32000, 48000, 96000, 192000, 250000, 384000 ]
Alternatively, you can switch back to using PulseAudio. To do so, run the configuration utility:
sudo raspi-config
Navigate to '6 Advanced Options' and then 'A7 Audio Config' and switch from '2 PipeWire' to '1 PulseAudio'. Then select 'Ok' to save the change and restart.