Re: [Alsa-devel] Starting multiple devices in sync

2001-09-16 Thread Jussi Laako
> >Yep, OK. I'll look if I can make the latest beta work with my Delta1010. Didn't get far on this. RPM build of alsa-driver beta 7 failed. It just messed up my existing and installed 0.5. Btw. I think the kernel version variable in .spec should be defined as %(uname -r) and not as some static v

Re: [Alsa-devel] Starting multiple devices in sync

2001-09-15 Thread Paul Davis
>> its not that simple. you have to make sure that the driver software >> state is up-to-date when the h/w starts. you can't just issue out()'s >> and then pick up the pieces later. you have to make sure that the >> driver infrastructure is ready to start processing interrupts, etc. > >Isn't this

Re: [Alsa-devel] Starting multiple devices in sync

2001-09-15 Thread Jussi Laako
Paul Davis wrote: > > it *IS* done in the drivers. what makes you think i was talking about > user-space? OK, I misunderstood something. > but the device drivers do not block interrupts while sync-starting > multiple devices. perhaps they should. its rather ugly. It depends how long it takes.

Re: [Alsa-devel] Starting multiple devices in sync

2001-09-13 Thread Paul Davis
>> but its still possible that if an interrupt occured at the wrong time, >> the delay between issuing the two start instructions could be >> sufficient to mess them up. its hard to work around this, though there > >Trying to do this in user space is mad. It should be done in drivers. it *IS* don

Re: [Alsa-devel] Starting multiple devices in sync

2001-09-13 Thread Jussi Laako
Paul Davis wrote: > > but its still possible that if an interrupt occured at the wrong time, > the delay between issuing the two start instructions could be > sufficient to mess them up. its hard to work around this, though there Trying to do this in user space is mad. It should be done in drive

Re: [Alsa-devel] Starting multiple devices in sync

2001-09-12 Thread Paul Davis
>I need to record at least 16 channels with no phase error between channels. > >Is it possible with alsa to start (trigger) two cards or two ADAT ports on >same card such way, that first samples from both devices are exactly from >the same moment? Devices are of course word clock connected. Time/p