29 Jul
2007
29 Jul
'07
3:11 p.m.
On 29 Jul 2007, at 16:46, Tim Goetze wrote:
[Steven Chamberlain]
My preferred solution would be if host authors fixed their sample-
rate-hint implementations, but it's not perfect even when it does work.
In general I want to be able to say something like minimum 10Hz,
maximum 0.45 x samplerate.
- Steve
Unfortunately jack-rack doesn't clamp the
minimum frequency, so it
goes
right down to zero, and 0-20Hz takes up three-quarters of the
slider's
adjustable range (which is rather tedious).
According to the XML file the minimum frequency is set as 0.0 *
sample
rate. Why does Ardour clamp at about 3Hz, is this an added
'feature' of
Ardour? (it is certainly useful to me)
It's quite sensible for a host to clamp a port value hinted
'logarithmic' this way. After all, log(0) doesn't compute.
About the 'sample rate' hint: I've removed all references to it from
my own plugins. It just doesn't work as expected in all hosts, and
that's no surprise to anyone who has examined ladspa.h's attempts at
describing its operation. Just do 'logarithmic' instead and clamp in
the plugin code -- not as nice but good enough, and consistent.