Re: [Rosegarden-devel] audio branch merge

[Richard B. <ric...@fe...>]

On Wednesday 28 January 2004 10:58, Chris Cannam wrote:
> On Wednesday 28 Jan 2004 10:22 am, Richard Bown wrote:
> > - fast forward/rewind during playback appears to include a pregnant
> > pause now - looping has the same problem
>
> This is _probably_ just the time it takes to refill the buffers.

Well it still happens when there's no audio playing so I presume it's just a 
readahead latency or whateverthehellitisthesedays.

> The other possible cause of delay is JACK transport sync, but if you
> aren't running any other transport clients that should be minimal.

Sync is enabled but no other clients were active.

> btw, where does the default of mono for audio tracks come from?

IIRC it'll be from the Instrument definition in RG file itself and if that's 
missing it'll be mono.

> > Actually audio VUs
> > are a bit all over the place.  Only one track seems to work at a
> > time.
>
> ? -- they seem fine here.

I'm just rebuilding JACK et al with capabilites support (I think) so I'll 
report back once I've got a more stable system.  I got myself the low latency 
CCRMA kernel now and am determined to get this laptop into a workable state 
with the onboard crappy soundcard.

> > - muting and soloing audio during playback is broken (that
> > "rationalise" code)
>
> Ah yes, I knew there was some reason for that.  I'll reinstate
> something like it.

It also did stuff like work out if an audio Segment had moved to another 
Instrument during playback and reassign the audio accordingly - or if you 
delete an audio Segment it'd remove that PlayableAudioFile.

> > - plugins don't appear to work
>
> Hmm.  Seems to be something iffy going on with the code that sets the
> plugins -- I've been using a test file with plugins no problem, and
> fiddling with the parameters to great effect, and I can toggle bypass
> etc during playback, but I see that if I remove a plugin and put it
> back it doesn't work any more.  Piss.

Well, I don't seem to get anything at the moment but I'll investigate further 
once I've rebuilt everything for the new JACK.

> > - repeated ffwd/rewind during audio playback seems to send the
> > sequencer off somewhere.  No crash and you can stop and restart
> > playback.
>
> Do you have JACK transport sync on?  If so, it's probably a race
> condition -- the chain of events when you hit ffwd with JACK
> transport switched on is incredibly complex.

Yeah, like I said I do have sync on.

JACK transport stuff is fun.  I'd like to see Ardour and Rosegarden working 
together now (esp if we can graft on the n channel audio output stuff we were 
talking about) if only I could get to grips with using Ardour that is.  
Looking forward to a demo from someone who knows RSN.

R