Joern Nettingsmeier wrote: cool, I'll check them out as well!

Am Sonntag, 10. Februar 2008 schrieb Malte Steiner: If you don't consider 5ms to be small, then you are right. I have successfully used my firewire-device and laptop as digital live mixing console here. Firewire (with freebob/ffado) is definitely capable of low latency! Arnold -- visit http://www.arnoldarts.de/ --- Hi, I am a .signature virus. Please copy me into your ~/.signature and send me to all your contacts. After a month or so log in as root and do a "rm -rf /". Or ask your administrator to do so...

Am Dienstag, 12. Februar 2008 schrieb Svend-Erik Madsen: I don't know. But most "fuzz-makers" become silent when you tell them that linux can breach the 5ms-latency-border. :-) Because most people of the outside-tech-world think that you need to have "zero latency" which translates to "10ms or less". So 5ms (even with my old on-board soundcard) really shuts them off. You might even be able to play through it up to 20ms latency, After that it gets difficult if you aren't a classical organist (these people are used to play with half a second of latency). Doing live FOH mixing or playing keys/instruments on/through the computer really needs low latency, where "low" means 10ms or less. For recording on the other hand you can use higher latencies because the good recording solutions can sync it up internally so that what you record gets aligned to what you (should) hear at that time. And with recording higher latencies gives you more cpu-cycles for disk-io... Arnold -- visit http://www.arnoldarts.de/ --- Hi, I am a .signature virus. Please copy me into your ~/.signature and send me to all your contacts. After a month or so log in as root and do a "rm -rf /". Or ask your administrator to do so...

Malte Steiner wrote: Actually I have to revise the opinion I expressed at the LAC talk. There are scenario's where firewire might even provide better latency than PCI. I think the lowest latency achievable (at the interface side) is approx 32 frames (i.e. 2x16) which is quite comparable to PCI I guess. The problem is the extra latency added by the device. This can be high, but for some it is very low (e.g. 16 frames). To summarize: a total roundtrip latency (jdelay) of less than 100 frames is achievable with firewire. A delta1010 has approx 180 frames (if I remember correctly), so I guess firewire can be competitive. Greets, Pieter

Malte Steiner wrote: I'll be there, but not as a speaker. Pieter

So I guess you have one with PC EXpresscard so PCMCIA is not a solution, or? One thing particular for laptop use: Depending on the model you might encounter the laptop humming noise and buzz. Some models are better but the only way to get rid of it for once and all is to decouple the converters from the computer via optical transcievers, for instance ADAT compatible connection for multichannel. Cheers, Malte -- Malte Steiner media art + development -www.block4.com- next event: 29.feb Notstandskomitee live at Linux Audio Conference Cologne, Germany

Arnold Krille wrote: I have been thinking about that too, but one of the showstoppers is the fact that firewire uses common-mode signaling for low-speed communication. I have to look into it further though. Pieter

Dang reply-to-all.... You are talking about two separate problems. One is a ground loop(The point where playing from battery makes a difference) and the easy solution is to lift the audio ground(NOT the mains ground). The other is poor internal shielding. Typically a problem with built in audio interfaces. There isn't a good solution other than to bypass the interface. While ADAT is certainly an option and moving the D/A outside of the box will make a difference, how much of one will depend primarily on the quality of the interface. For built in interfaces on laptops it will likely be noticeable. For higher end cases though it might not be as much. Considering however these days the standard seems to be to have a breakout box anyways connected either via Firewire, USB, or PCMCIA/Expresscard, it is kind of a moot point with the higher end stuff nowadays anyways. Seablade On Thu, Feb 14, 2008 at 11:01 AM, Malte Steiner <steiner(a)block4.com> wrote: