[pd] audio glitch?

[Bradon Webb]

I hear a clicking sound that interrups the audio
stream of a smooth tone playing.  I am testing the
sound from the test audio and midi help patch. I tried
to play just a regular CD which plays fine from the CD
application on Linux so I believe the sound card to be
working properly.  I am on a Dell laptop with Planet
CCRMA Fedora Core install. 

This is how I start PD:

<#################################################
[root at localhost root]# pd -rt -listdev
input devices:
1. ESS Maestro3 PCI (hardware)
2. ESS Maestro3 PCI (plug-in)
output devices:
1. ESS Maestro3 PCI (hardware)
2. ESS Maestro3 PCI (plug-in)
API number 1
 
no midi input devices found
no midi output devices found
priority 2 scheduling enabled.
memory locking enabled.
priority 4 scheduling enabled.
memory locking enabled.
couldn't open MIDI input device 0
couldn't open MIDI output device 0
opened 0 MIDI input device(s) and 0 MIDI output
device(s).
Sample width set to 2 bytes
################################################>


The DIO errors button will light up red which I assume
is a bad thing?? 
here is what I got when I clicked the DIO button.


<#################################################
audio I/O error history:
seconds ago     error type
     0.08       data late
     0.08       data late
     0.08       data late
     0.08       data late
     0.09       data late
     0.09       data late
     0.09       data late
     0.09       data late
     0.09       data late
     0.09       data late
     0.09       data late
     0.10       data late
     0.10       data late
     0.10       data late
     0.10       data late
     0.10       data late
     0.10       data late
     0.10       data late
     0.11       data late
     0.11       data late

audio I/O error history:
seconds ago     error type
     0.10       DAC blocked
     0.10       A/D/A sync
     0.51       data late
     0.51       data late
     0.51       data late
     0.51       data late
     0.52       data late
     0.52       data late
     0.52       data late
     0.52       data late
     0.52       data late
     0.52       data late
     0.52       data late
     0.53       data late
     0.53       data late
     0.53       data late
     0.53       data late
     0.53       data late
     0.53       data late
     0.53       data late
#############################################>


I read something in CCRMA about tuning the scheduler
to run the audio aplication as SCHED_FIFO so it will
have a higher priority?  I do not know anything about
this?  I am running PD with the -rt flag and assume
that it is running at highest priority and have tested
the kernel for lowlatency by:


<################################################ 
[root at localhost /]# cat /proc/sys/kernel/lowlatency
1
#################################################>

What can I do to to test what is going wrong or to fix
this???



	
		
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