On Sun, 2009-12-27 14:50:20 +0100, Markus Vogl markus.vogl@gmx.net wrote:
Von: Jan-Benedict Glaw [mailto:jbglaw@lug-owl.de]:
On Sun, 2009-12-27 13:26:31 +0100, Markus Vogl markus.vogl@gmx.net wrote:
my project is to analyse the mic input frequency from my asus eepc 1008ha with ubuntu 9.10 and show it in a terminal window. i would use my acoustic 6 string guitar to play in front of my netbook.
i´ve testet the howto from linuxjornal.com .. http://www.linuxjournal.com/article/6735
...but i´ve no plan to use the mic input and then analyse it with fftw.
Why do you need to do ALSA programming in the first place? Isn't it enough to use any given ALSA-capable audio recorder (eg. arecord) to record some sound, convert it to raw PCM data (eg. cut off the WAV header) and then shift all the data into the FFT lib?
i have to do this in realtime (like a guitartuner) and with my "project" i have to see the frequency shift in realtime in a terminal window.
Sure. Just let eg. arecord write to stdout or to a FIFO and read the data from there. You can directly request raw output, all you need to do is to shouvle the data through the FTT lib...
MfG, JBG PS: I did some clean-up of your TOFU email.