Help needed: export appears to be unsigned, but all apps treat it as signed
I am using ardour 2.8.11 (built from revision 7387) the version current in Ubuntu 11.10 -- I had used Ardour on this machine prior to upgrading to 11.x, but now I find that I cannot export to any useable formats, ALL formats create a file with a waveform that only moves in the plus direction from -1.0 -- this is the same if I use wav, ogg or aiff, no matter what format I select, the file generated loads into audacity as only half the wave forms with the zero-line along the -1.0
what did I do wrong? more to the point, how can I correct this? the recorded tracks seem ok, I can playback (via jackd) from ardour, but the exports all end up as useless noise (I 'normalized' one in audacity and that's where I discovered I was getting a half-wave based on -1.0) It is my guess that ardour is saving unsigned 32-bit regardless of the export settings, but the headers or some other information is forcing all apps to load it as signed, so the wave form never goes negative.
I have a screenshot showing the jackd and export settings along with the audacity display of the wave form; I don't know if this forum allows attachments (there is no option for this on the current screen)