Re: [LAU] Does jackd sits on top of ALSA ?

Jan 8 2018, jonetsu has written: ... JACK sits ontop of ALSA (or another hardware driver). No. ALSA is the hardware driver for your audio/MIDI interface(s). It implements a communication between the Linux kernel and the hardware or firmware on the soundcard. Then it offers an API to programs using audio. So there are specific functions that you can call in a C/C++ program. You can use the same functions for any soundcard, without worrying what the soundcard really needs to do to fulfill your request. You can just say: give me two audio channels at 17bit and 44.1kHz for recording. This will work for any soundcard that can give you those two channels. If not it, the ALSA API will return a standard error. JACK sits ontop on an even higher level. It does its best to give you lowlatency and some guarantees. It also gives you the software patch system with all those JACK ports that you can connect as you please. This allows you to connect software to hardware, hardware to hardware or even two programs. That's a very rough answer, possibly false in many respects, but unless you need to really delve into all that, it is true enough from the user's point of view. :) HTH, best wishes, Jeanette ... -------- * website: http://juliencoder.de - for summer is a state of sound * SoundCloud: https://soundcloud.com/jeanette_c There must be another way Cause I believe in taking chances But who am I to say - What a girl is to do <3 (Britney Spears)