Re: [Linuxsampler-devel] LinuxSampler BUGS to fix (Christian & others)

[Mark K. <mar...@co...>]

On Tue, 2003-11-18 at 15:28, Christian Schoenebeck wrote:

> > Christian any idea why on Mark's box the current CVS does not work ?
> 
> Nope, I don't really think it has to do something with my changes. Mark, have 
> you removed the sources and tried a clean new checkout? Perhaps you just 
> messed up something accidently.

Apparently I did mess something up. As I said, I was using my USB
devices over the weekend to test my dad's new machine, so I had
unplugged by MidiSport. When I was done I plugged it back in, but
apparently plugged it into a different USB port. For whatever reason,
the device was 'recognized' as a USB device, and using usbview I could
see all the config data inside of it, but for some reason it doesn't get
linked to the usb-audio driver when plugged into that port.

I eventually noticed that the usb-audio driver, while loaded, said it
was unused, so I plugged the MidiSport into a different USB port and
then the MidiSport linked itself to usb-audio and started working again.

Why should this be? Why doesn't Linux treat this stuff the same?

I do not see much difference in terms of segfaults from the previous
rev. It still dies after one or two notes as it did before. (Get up to a
high voice count, let the voices die away so it all goes back to zero,
then play a few notes and it crashes.)

Anyway, with the MIDI input working again I played a bit with the new
code. I don't have much good to report really. It does work now, in the
sense that I get audio, but my sense (just from playing) was that
somehow the sample choices it's making from a multi-sample/note library
are not right. I got some very strange effects playing hard and soft.

To study this a bit I ran the Bardstown piano through the MIDI velocity
tests I had done earlier. This was the MIDI file supplied by Warren
Trachtman. What I found was that volume is not varied at all over the
complete range of MIDI velocities, while there seemed to be only 3
samples chosen out of the 4 in the library. This would seem to be a bug
to me, but possibly not...

I do not know if you are even attempting to chose samples based on
velocity, nor do I know if you are trying to control volume at all based
on velocity, so I won't call these results a bug until you report back
what I should be getting.

I hope this data helps.