Carla is described as 'audio plugin host, with support for many audio drivers and plugin formats. It has some nice features like automation of parameters via MIDI CC (and send output back as MIDI too) and full OSC control' and is an app in the Audio & Music category. There are more than 25 alternatives to Carla for a variety of platforms, including Windows, Mac, Linux, iPhone and BSD. The best alternative is LMMS, which is both free and Open Source. Other great apps like Carla are GarageBand (Free), VB-Audio Virtual Cable (Freemium), Giada (Free, Open Source) and LinuxSampler (Free, Open Source).
Welcome to the school of rock. A Mac-sized practice space. Your own recording studio. If you want to learn to play an instrument, write music, or record a song, GarageBand can help — whether you’re a rookie or a rock star.
VB-Audio CABLE is a Windows Audio Driver working as a Virtual Audio Cable. After installing the VB-CABLE driver, a new playback device appears in the audio device list and can be set as default device. VB-CABLE can be set as the default device, just like any regular audio device.