On Fri, January 18, 2013 7:51 am, Stefan Stefanov wrote: > 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) > Jack is probably started with a sample rate of 48000. You can of course start jack with a sample rate of 44100 or you can tell ecasound to resample from 44100 to 48000. Probably easier to tell jack to use 44100 though. > 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 > -- Patrick Shirkey Boost Hardware Ltd _______________________________________________ Linux-audio-user mailing list Linux-audio-user@xxxxxxxxxxxxxxxxxxxx http://lists.linuxaudio.org/listinfo/linux-audio-user
