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yoyz / amsynth

Automatically exported from code.google.com/p/amsynth
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AMS locks when inactive #32

Closed GoogleCodeExporter closed 9 years ago

GoogleCodeExporter commented 9 years ago 
What steps will reproduce the problem?

1.  Connect AMS MIDI to MIDI keyboard in qjack
2.  Connect AMS audio to Calf Plugin-[Rotary Speaker] in qjack
3.  Start Playing (usually the Reed Organ vioce, slightly modified)- everything 
    acts and sounds fine
4.  If I minimize AMS and work on something else (PDFs, Score editors), AMS
    starts eating CPU, usually locking my machine. My computer will go from 
    approx. 15% CPU usage to 100% in just a few seconds.

AMS doesn't lock every single time I follow the precedeing steps, there seems 
to be no pattern as to when it decides to lock.

After AMS locks, I can usually unlock it by hitting a few keys on the MIDI 
board. A noise surge will happen, CPU usage will drop, and then AMS will work 
fine.

If I am careful to hit a few keys on my MIDI board every few seconds, AMS wont 
lock.

I am using AMSynth 1.2.3 on Ubuntu Studio 11.04. My computer is a Lenovo/IBM 
T43p Laptop(2Ghz.processor, 2GB RAM)

Thanks

Original issue reported on code.google.com by musiek.s...@gmail.com on 28 Dec 2011 at 12:40

GoogleCodeExporter commented 9 years ago 
The high CPU usage is caused by the reverb processing denormal numbers when the 
input signal goes quiet. Issue has been fixed in version 1.3 of amsynth

Original comment by nickdowell on 28 Dec 2011 at 2:24