[Linuxsampler-devel] Occasional clicks at the beginning of the played sample (fwd)

[Holger M. <ho...@ma...>]

Hi all,

I tested some more. The sfz-file begins with:

<group>
seq_length=2
ampeg_decay=37
ampeg_sustain=0.001
ampeg_release=0.4
loop_mode=loop_continuous
<region>
sample=1_E_a.wav
lokey=0 hikey=28
[...]

I noticed that if I set seq_length=1 the clicks don't happen.

The clicks only happen when
- seq_length=2
- the same note gets play twice, so that it cycles through the 2 samples

Is this a known bug? Is there a workaround by changing some parms in the
sfz-file?



---------- Forwarded message ----------
Date: Thu, 26 Jun 2014 19:09:52 +0200 (CEST)
From: Holger Marzen <ho...@ma...>
To: lin...@li...
Subject: Occasional clicks at the beginning of the played sample

Xubuntu 12.04 LTS,
Kernels 3.5, 3.15-lowlatency and 3.14.3 with realtime patch
16 GB RAM, Core i5, SSD (desktop and notebook computer)
linuxsampler svn 2482 (I also tried a recent one yesterday but it crashed)
sfz engine used
jack used

Tested with linuxsampler standalone, linuxsampler-dssi and
linuxsampler-lv2

I experience occasional clicks at the beginning of played notes, about
one every 10-20 seconds, varying in their strength. It doesn't depend of
the soundcard used. It happens even with the dummy sound device when
playing a MIDI track with Rosegarden or Qtractor.

I managed to catch twice the same note/sample, one deformed with click,
one clean:
http://www.marzen.de/tmp/click.jpg

This is another one with click. It can be seen in the waveform:
http://www.marzen.de/tmp/click2.jpg

It seems that some samples simply get lost.

It happens on both of my computers.

There are no problems with JACK processing other audio, at least no that
I ever noticed.

I run out of ideas. This is a big problem for me because with occasional
klicks when using linuxsampler I can't use my sfz-soundfonts for high
quality recording.

Any ideas?