[PlanetCCRMA] ardour error

[R Parker]

Hi Mike,

--- mike@banta.psyc.missouri.edu wrote:

Can someone tell
> me how much I should 
> trust the audio meters in Ardour?

I trust the Ardour and JAMin meters. I've done
extensive mastering which requires accurate amplitude
and what I see in their meters is consistent at the
DM-24.

sndfile-info is useful for finding max level in a
song:
[studio@stepdaddy master]$ sndfile-info lesbian.wav

Version : libsndfile-1.0.11

========================================
File : lesbian.wav
Length : 28225580
RIFF : 28225572
WAVE
fmt  : 16
  Format        : 0x1 => WAVE_FORMAT_PCM
  Channels      : 2
  Sample Rate   : 44100
  Block Align   : 4
  Bit Width     : 16
  Bytes/sec     : 176400
data : 28225536
End

----------------------------------------
Sample Rate : 44100
Frames      : 7056384
Channels    : 2
Format      : 0x00010002
Sections    : 1
Seekable    : TRUE
Duration    : 00:02:40.008
Signal Max  : 21654 (-3.60 dB)

You can also use jaaa as an oscilator and follow the
routes around.

  Because, even
> when all individual 
> tracks stay under zero, and the master does as well,
> I still here what 
> sounds like clipping at the output.

Are they xruns?

  This seems to
> be concurrent with 
> peaking of the sum of all tracks, rather than an
> individual one.  Also, my 
> preamp has a hard limiter on it at 0, which goes
> into a delta44..so input 
> should be ok, espically since ardour's input meters
> never go above -3.
> 
> So, should I need to keep ardour's master well under
> "0"?

No. That's definitely not my experience.

  And when 
> mastering with jamin, can I trust those meters? Are
> there any meters I can 
> run through jack which can be trusted?  

Are you sure the problem is levels and not xruns? Are
you using Qjackctl? Its graphic routing/patchbay makes
it easy to check that you haven't got unintended
alsa_pcm:playback routes.

Anyway, I think you can trust the meters. Maybe
something has recently changed but I doubt it.

ron

> Thank you all!
> Mike
> 
> On Mon, 24 Jan 2005 mike@banta.psyc.missouri.edu
> wrote:
> 
> > I just got the new build of ardour, and during my
> session it said it 
> > couldn't save the my_song.ardour file (it was a
> brand new session).  After 
> > four pathetic tracks I closed and 'saved' the
> session, and now on 
> > reopening it it says 'could not understand ardour
> file my_song.ardour.
> > 
> > I also saved a snapshot during the session, and it
> can't load that either!  
> > It did save all my tracks in /sounds...I can't
> belive this is a problem 
> > with my machine/permissions/etc...anyone
> encountered this? any clues?
> > 
> > Thanks, 
> > Mike
> > 
> > 
> 
> -- 
> 
> 
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