Subject: [linux-audio-dev] LADSPA problem
From: Steve Harris (S.W.Harris_AT_ecs.soton.ac.uk)
Date: Thu Oct 19 2000 - 20:31:13 EEST
Hi,
I've been playing with LADSPA on and off for a couple of days, but I've
hit a problem: as far as I can tell the input range of an audio stream is
not specified, I was expecting it to be -1 to 1, but it looks like the
host can choose any value it likes.
This causes problems with amplitude dependent plugins. I don't seem to be
able to specify upper and lower bounds on audio ins (analyseplugin gets
confused, anyway, always shows 0 to 0).
What are you supposed to do? The limiter I looked at works by asking
for the threshold (in arbitary units), but this isn't a very good
solution. Surely the user isn't expected to know the internal ranges
of thier application? There is a LADSPA_HINT_SAMPLE_RATE, why not a
LADSPA_HINT_AMPLITUDE?
Hoping I've missed something,
Steve
--
Stephen Harris
MALIBU Technical Officer & JoDI Webmaster
IAM Research Group
University of Southampton, UK
07970 557047
swh_AT_ecs.soton.ac.uk 023 8059 2774
This archive was generated by hypermail 2b28 : Thu Oct 19 2000 - 21:03:34 EEST