[iiwusynth-devel] Newbie getting warnings and pops/clicks

[Ken Ellinwood]

Hello,

What I hear so far from iiwusynth is very impressive, but I'm getting
warnings at startup and hearing pop/clicks in the output.  Any help
would be appreciated.  Maybe I'm no using the best driver?  Eg., the
system is currently has OSS drivers installed, not ALSA.  The gory
details follow...


I'm running Red Hat 8.0 and downloaded, configured, compiled and
installed iiwusynth-0.2.2.

At first I couldn't run iiwusynth from the command line due to file not
found: libiiwusynth.so.0.  I solved this problem by running
"/sbin/ldconfig /usr/local/lib".  I noticed that 'make install' did a
"/sbin/ldconfig -n /usr/local/lib".  Apparently the -n option doesn't
result in properly configured libraries on my system.

Now I can run the synth, but I get these warnings at startup.  E.g.,...

$ iiwusynth -M /dev/midi00
iiwusynth: warning: Couldn't set high priority scheduling for the audio output
iiwusynth: warning: Couldn't set high priority scheduling for the MIDI input

I also get the following warning when I load a soundfont:
load jonnypad6.sf2
iiwusynth: warning: Failed to disable paging of sample data

The instrument in question has long sustain/release times -- I send
noteon and hear the note transition through its envelope for about 18
seconds.  During this time I hear about 5 loud clicks.  The clicks
occur at different times even if I send the exact same noteon command
again.

What follows is partial output from the ./configure step during
installation.  It shows what I think might be relevant as far as sound
related library/driver detection:


FCLDFLAGS =
checking for ALSA CFLAGS... 
checking for ALSA LDFLAGS...  -lasound -lm -ldl
checking for libasound headers version >= 0.9.0... not present.
checking for snd_seq_open in -lasound... (cached) no
checking for fcntl.h... (cached) yes
checking for sys/ioctl.h... (cached) yes
checking for sys/soundcard.h... (cached) yes
checking for machine/soundcard.h... (cached) no
checking for tgetent in -lmytinfo... (cached) no
checking for tgetent in -lncurses... (cached) yes
creating ./config.status
creating Makefile
creating src/Makefile
creating src/config.h
src/config.h is unchanged

**************************************************************
Summary:
ALSA:                  no
OSS:                   yes
MidiShare:             no
JACK:                  no
Sound file:            yes
Readline:              yes
Debug:                 no
Profiling:             no
LADSPA support:        no
**************************************************************

Any help or pointers would be appreciated.

Thanks,
Ken Ellinwood

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