On 13.8.2012, at 20:29 , Miller Puckette wrote: > This is good news about the TASCAM devices (I see there's a whole series > of them and they're cheap.) I've also heard that Presonous's interfaces > are class compliant, but I've now forgotten who told me that. > > I read some months ago on the Raspberry Pi site that it should perform > "about like a 300 mHz Pentium II" - and the fact that it runs the phase > vocoder patch without running out of CPU cycles roughly confirms that.
I just checked the Phase Vocoder (compile of Pd-extended on Raspbian) via X11 redirect: Pd eats about 68% CPU load running a 2k window. A 4k window causes about 75% CPU load where occasional glitching occurs. To avoid additional system load I tried to run it with -nogui (after preparing the patch) via ssh but the system claims the sound device is busy. Didn't find out why so far, a simple test-patch runs fine though. No idea what's going on. > For those of you who are getting skips in the sound, I'm curious if Pd > is printing the usual messages like: > > priority 96 scheduling enabled. > priority 98 scheduling enabled. > > on standard error when it starts up -- no, no such messages at start up. > if not, it would be worth trying > to figure out how to get Pd to be able to get real-time priority which > might fix some of the problems. BTW, is it possible to quit Pd via the patch? Just in case Pd has such high priority that the system becomes inaccessible. thanks, Michael. > On Mon, Aug 13, 2012 at 08:35:25AM -0700, Scott R. Looney wrote: >> hey folks - just commenting on USB class compliant devices - the Tascam >> US-800 interface (about $100US) is another class compliant device. it's >> been shown to work reliably with 8 track recording on iPad. just wanted >> folks to know there was a cheaper interface option out there, though i'd >> certainly love to own a Fireface USB interface myself. The US-800 has 6 >> Neutrik inputs with phantom, 2 SPDIF (Stereo In and Out) and 4 unbalanced >> outs. it's very light, though, and it may be possible (with modification) >> to stick the R-Pi inside its case. >> >> hope this might help somebody... >> >> scott >> >> On Mon, Aug 13, 2012 at 6:54 AM, Tedb0t <[email protected]> wrote: >> >>> Huh, really? How did you find this out? >>> >>> —tedb0t >>> >>> On Aug 13, 2012, at 8:43 AM, Pierre Massat wrote: >>> >>>> Hi all, >>>> >>>> I don't know whether this was mentioned here, but the audio output >>> throught the built in jack is bad because it uses PWM followed by a filter, >>> no real dedicated dac. You can tweek the settings of Pd for years but >>> you'll never get an good quality sound out of it. >>>> >>>> Pierre. >>> >>> _______________________________________________ >>> [email protected] mailing list >>> UNSUBSCRIBE and account-management -> >>> http://lists.puredata.info/listinfo/pd-list >>> > >> _______________________________________________ >> [email protected] mailing list >> UNSUBSCRIBE and account-management -> >> http://lists.puredata.info/listinfo/pd-list > > > _______________________________________________ > [email protected] mailing list > UNSUBSCRIBE and account-management -> > http://lists.puredata.info/listinfo/pd-list -- feed your perception: http://blauwurf.at http://soundcloud.com/noiseconformist _______________________________________________ [email protected] mailing list UNSUBSCRIBE and account-management -> http://lists.puredata.info/listinfo/pd-list
