On Wednesday 11 August 2004 04:34 am, Chris Cannam wrote: > On Wednesday 11 Aug 2004 2:56 am, Silvan wrote: > > What it does affect are any kind of CPU-based synthesizers. The > > DSSI plugins, and more conventional soft synths too. They're all > > exhibiting the same symptoms. > > What, so something like ZynAddSubFX sees the same problem?
To a lesser extent, yes. It's a question of degree more than anything else. I can play Zyn with the keyboard, and it sounds fine. If I play it with a MIDI track in RG, it develops occasional light crackles that remind me of a record. Playing through the keyboard, XSynth has heavy crackles, like a dirty record. Playing with the same MIDI track in RG, it begins to sound like a guitar amp that fell off the truck too many times. When I get XSynth sounding especially horrible, it's obvious listening to the recording that JACK isn't quite recording properly during the crackles. They're captured, but their character is subtly changed in a way that suggests to me it's dropping samples on top of everything else. And there again, yes, definitely, moving the mouse around causes... I don't know how to describe it really. Bizarre flanger-like effects. I can't tell if it's the mouse itself, or the GUI. My focus policy is set to follow the mouse, and when a window lights up, I hear strange pitch shifting effects. If I drag a window around, these effects are dramatically worse. I've observed and mentioned this before, but this is the worst I've ever seen it. > What about Xsynth hosted by dssi_example_host? That may be the most > important thing to compare with, actually. ? Is that in the sources somewhere? > As I'm sure you realise, what you're describing doesn't seem to make > much sense. For every synth (standalone or hosted) to suffer hideous > crackle yet effects plugins to be able to process audio and output > the results without any trouble at all is very odd. Yes, it's extremely odd, isn't it? I wish I were making it up. I just confirmed it though. > all your samples to stdout (if your terminal emulator is up to it -- > or redirect to file) and then take a look and see if there are random > zeros in there, which is what this it sounds a little bit like. That's worth a look, I guess. > It might be worth changing things like the JACK period size. It's > faintly possible you've hit a bug that mangles things when the > buffers are of some particular unexpected size. Do you mean frames/period or periods/buffer? If the latter, which I assume, then I can't change it. The only number that works is 2, and that's what it's set to. JACK won't start at all if it's at anything else. > As if I had to say so, by the way: I can't reproduce this here... Yeah, I'm just doomed. One of these days I think I'm going to buy a dedicated music computer. Running this stuff on a box that's serving two terminals with three KDE sessions running probably doesn't help matters much. That could be what makes me the odd duck in this crowd. Two network interfaces too. If only I had money. -- Michael McIntyre ---- Silvan <[EMAIL PROTECTED]> Linux fanatic, and certified Geek; registered Linux user #243621 http://www.geocities.com/Paris/Rue/5407/ http://rosegarden.sourceforge.net/tutorial/ ------------------------------------------------------- SF.Net email is sponsored by Shop4tech.com-Lowest price on Blank Media 100pk Sonic DVD-R 4x for only $29 -100pk Sonic DVD+R for only $33 Save 50% off Retail on Ink & Toner - Free Shipping and Free Gift. http://www.shop4tech.com/z/Inkjet_Cartridges/9_108_r285 _______________________________________________ Rosegarden-devel mailing list [EMAIL PROTECTED] - use the link below to unsubscribe https://lists.sourceforge.net/lists/listinfo/rosegarden-devel
