On Wed, Aug 20, 2003 at 08:29:12PM +0200, Karsten Wiese wrote: > Am Mittwoch 20 August 2003 19:58 schrieb Martin Langer: > > > > Stupid question: Why do we need synchronisation?? > to avoid crackles in Audio Out. goal: feeding Audio Out exactly as many frames > as it can digest.
I see. > > Isn't it the job of the FPGA? We know that each signal is routed across the > > FPGA and that's why the config data should be loaded into for standalone > > usage or nothing will work on our USxxx. Without an internal > > synchronisation there would be no standalone usage possible or do I make a > > mistake here. > What do you mean with standalone usage? I can use my us122 in a direct mode. There I can receive the audio signal from Audio-In on the Audio-Out jacks. But I have to load both firmwares and some USB power is neccessary. And without firmware there is no signal on Audio Out. > You have the 122s circuit diagram? No, I don't have a circuit diagram. But lots of fantasy;-) > What I know so far is: there are no crackles in audio anymore if we feed > "Audio Out" at exactly the frame-rate we have received from "Audio In" just > before. > this is what I mean by synchronisation. Thanks for explaining it. Now I know what you mean here. > would you try the us428 audio part on the us122? I could send you a special > version for 2 Audio Ins & 2 Audio Outs. We could then build a snd-usb-usx2x > module ;-) None the less you'd first have to extract the second stage > firmware. have you already? Yes, we should try out this possibility of a common snd-usb-usx2x! Sorry, Tascam FPGA firmware loader development is still not finished: More (cvs/mail) on http://sourceforge.net/projects/usb-midi-fw/ martin ------------------------------------------------------- This SF.net email is sponsored by: VM Ware With VMware you can run multiple operating systems on a single machine. WITHOUT REBOOTING! Mix Linux / Windows / Novell virtual machines at the same time. Free trial click here:http://www.vmware.com/wl/offer/358/0 _______________________________________________ Alsa-devel mailing list [EMAIL PROTECTED] https://lists.sourceforge.net/lists/listinfo/alsa-devel
