Hi Julien In process of accomplish my task with EQ I discover a problem playing music with ecasound. If I execute: ecasound -i test.wav -o jack_multi,system:playback_1,system:playback_2 then I get this error: "ERROR: Connecting chainsetup failed: "All audio objects must have a common ... sampling rate; sampling rate of audio object "jack_multi" differs from ... engine rate (48000 <-> 44100); unable to continue." " I run jack like this: /usr/bin/jackd -P 85 -d alsa -P hw:2,0 -n 3 -p 256 (test.wav format is 16,2,44100) Regards Stefan 2013/1/17 Julien Claassen <julien@xxxxxxxxxxx>: > Hello Stefan! > Ecasound's basic concept is chains. A chain looks like this: > input -> possible processing options -> output > So you can use jack intput and output: > ecasound -f:16,2,44100 -i jack_multi,mpd:out1,mpd:out2 -o \ > jack_multi,system:playback_1,system:playback_2 > At the end of this line you can add effects. For example a filter. You can > use LADSPA unique IDs or the labels. I prefer IDs, since I always forget > upper and lower case letters. So the GLAME Highpass IIR filter (label: > highpass_iir and ID 1890). It has two parameter cutoff and poles/stages. You > can find that out with analyseplugin from the basic ladspa suite or look it > up in your favourite graphic ladspa host. So at the end of the ecasound line > we have: > -eli:1890,50,2 > or > -el:highpass_iir,50,2 > Adds a highpass filter with 50Hz cutoff frequency and two stages/poles. > My favourite EQ is still Fons Adriaenson's 4-band parametric EQ (1970). I > think the package is called 4-band parametric filter (or just filter). It > has a lot of options, you can try them in your favourite graphical > application first and then copy all the values, that you found. probably > easiest for you. > If you need more help ask. - one last note: the -f:16,2,44100 is the > ecasound audio formation option, see the manpage. It's > bitrate,number-of-channels,samplerate. So this is CD-quality. Adapt to your > needs. > Warmly yours > Julien > > ---------------------------------------- > http://juliencoder.de/nama/music.html _______________________________________________ Linux-audio-user mailing list Linux-audio-user@xxxxxxxxxxxxxxxxxxxx http://lists.linuxaudio.org/listinfo/linux-audio-user
