-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 On 07/13/2013 09:50 PM, Carlos sanchiavedraz wrote: > Hello, dear folks. > > I'm still (constantly) tweaking my raspberry here and there when I > can. I have some configurations/sessions that run ok, Looper > (jack+sooperlooper), Looper+Fx > (jack+sooperlooper+rakarrack/guitarrix). But I'm still having some > annoying problems that wanted to share with you: > > 1) Simple session script, Looper, runs quite well when launched > (via ssh -X or from console) logged as PI user. When I run it as a > boot/init script (simple launcher script placed in /etc/init.d and > then installed with "update-rc.d launcherscript defaults 99"), > almost in every first start there's crackles and noise and my loops > sound distorted, even with clean guitar; if I restart then it goes > well (2nd or 3d time). > Hi Carlos, Try resetting the JACK buffersize with jack_bufsize after starting your program. This does the trick for me on the RPi. > 2) Next step forward I added Rakarrack in charge of guitar FX > routed to the Looper. First, it happens almost same thing as > mentioned about noise. Well, I guess It should have something to do > with the signal path and things connected to the same power > supplier, so I'll have to reserve some time to debug and switch off > things until I get a cleaner signal and get rid of the hum and > crackles. But the main issue is that there's problems with > Rakarrack not been able to start because several problems with not > enough Jack ports and Jack and RT. I didn't have any of these > problems before. > > I got to solve the problem with ports changing -p16 to -p32 when > launching jack+sooperlooper (-p24 is enough for just Rakarrack). > > Then I made a launcher script LSB compliant (service script placed > in /etc/init.d and then installed with "update-rc.d servicescript > defaults", with LSB flags and functions for "start" and "stop", as > a proper newer Debian service, and configured to launch last in > boot phase) which then call the Jack-config+Rakarrack+Sooperlooper > session launcher script. I can see on screen in the init messages > this error: > > "JACK is running in realtime mode, but you are not allowed to use > realtime schedule..." > > But I know RT is already configured, so I guessed it was something > to do with the boot/init stage configuration and environment. I > tried using "su" with several different parameters to run the > launcher script as "pi" user, as It runs quite well when logged as > this user (calling just the script and even with "sudo > /etc/init.d/script start"). So, maybe you can't get RT in init > phase on RaspberryPI and you can only when you get to the login > prompt and everything is loaded and ready. But I think there's a > "Puredata on Raspberry PI" project that runs some scripts in the > init stage; and it seems that in order to get a headless FX+looper > station, running some configuration+apps-launcher at boot time is > an obvious choice. > > I'm sure something escapes me after so much try-error-code cicles. > Maybe you have some ideas. > http://lists.linuxaudio.org/pipermail/linux-audio-user/2013-March/091750.html Regards, Jeremy > Thanks as always. > > -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.11 (GNU/Linux) Comment: Using GnuPG with undefined - http://www.enigmail.net/ iQIcBAEBAgAGBQJR4bG2AAoJEF63J34m6LiUDq4P+QHsb/bODOeBtL0dQUvmNrD2 jXeYyU57kAF5Al5Nf7e8vtAKuGSsLuVhF30CYGtcM1VUHYT0PFVfaOkZxlQsLJ6W nM2w36ADyIEgboadWmS9DqoEP+L80XR6EpK9Bz1ZuMYgLsKg5eOP6m94v4rArsjQ KDZTEIB5S4d1F4ZvDHbAnH2vY2wlhaH7Ii0R8IKuNCZwJP3L96abayNB9AjA6Fzu SiKmjrnibujvonXOi3ew/86mES7AbOCJ9Bc4FnP+ZDlLMhvV3LGQQ5/lG5mLXW78 nqwQM958pZJrn7ZHgsU73mhi6i1iBP7hjGTtbdOd6NeUyNcWPeVnhJbHJAM9HCBE xs0NkNVoQJnmRrBnT8yYcrZY3Vk6+8dzC/XbRlo97yvfNixKHEfTaAY2aMptQuCu +zPURKNij22FHU1+r7IzZQR6zvoHIxN2zqs7k8677CQEzYFJ8OOcu3YiixmIhPll q9ZVTiy13fONzgdenhwY9Ow+26vtQF+HVcLt3d5WegaEjjkykxvX/6CLX0nLrlqz 3DwyQ0DD0Wk20DwejIsfVo0zDhmw9XKZY2UPX6zCm9p/JIuD/IxYq5mzvZXiGToS 5KTBrT2NAn3t03591M1HiekA8YEj8p4BHVOM8yVTxI3T5RSiT09kYSuKg2RpAfNJ tp6jusbkXuF0aEZav7K2 =hhBs -----END PGP SIGNATURE----- _______________________________________________ Linux-audio-user mailing list Linux-audio-user@xxxxxxxxxxxxxxxxxxxx http://lists.linuxaudio.org/listinfo/linux-audio-user
