Am Donnerstag, 31. Juli 2008 schrieb Adrien DANIEL: > On Thu, Jul 31, 2008 at 1:27 PM, Arnold Krille <arnold@xxxxxxxxxxxxx> wrote: > > Apart from the fact that there are ways of doing this in software (with > > all the latency and uncertainty that arises there), you should *please* > > look at the archives of this list and find out why it is nearly > > impossible to do what you are thinking of. > > In short: You definitely need to get the clocks of the converters in > > sync. And you should also get the interrupts in sync. > I am aware of these sync issues and I mentioned that in my second > post, however I read somewhere that it is possible to do this in > software with, as you said, some uncertainty. Of course, I voluntarily > left apart hardware sync, since it concerns expensive soundcards. But for making music with (real) instruments these are the important factors. Of course you can add jitter-buffers to sync all the input- and output-soundcards in software. But this adds a lot of latency. Something like syncing two VoIP/Mobile phones with their sometimes horrible latency (which you can hear when the echo-cancellation doesn't work correctly). And then try to play non-experimental, non-electronic music about that... > Anyway, in my opinion, the idea to provide a *high quality* guitar > (including a *high quality* ADC) that you could easily plug into your > computer to play music on a conventionnal hi-fi system is not so odd, > commercially speaking. Keeping this in mind, I was simply wondering > the extent to which it was possible to generalize this to several > instruments (especially in JACK), again because it does not require > any additional sound device or guitar amp. Well, it requires additional devices: you do want to hear something. At least the recording-engineer wants to hear what is on (digital) tape. So you really have to sync all the devices by an external word-clock. Again: firewire has a global bus-clock which devices (can) use to sync with so that all devices on the bus have the same word-clock. Arnold PS: No need to CC me, I am subscribed... -- 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...
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