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The peak meter needs to withstand various test-signals without visual jitter (in particular 1kHz sine) regardless of settings (period-size, sample-rate, custom fall-off). This needs to be done in sync (and not by a random non-rt ‘smoothing’ thread). On the downside this voids the ‘visual smoothing’ particularly with large buffersizes - but then again exactly this “always fall-off no matter what [the next real data will be]” is the problem. One the upside, there’s one less high-frequency (100Hz) thread (Yay!) PS. it probably never worked on windows, anyway. Only peak-meters are affected by his change. K-meters, IEC I/II and VU were never visually smoothed.
Please see the Ardour web site at http://ardour.org/ for all documentation..
For information on building ardour:
http://ardour.org/development.html