| Bugs item #3295456, was opened at 2011-04-30 19:01
Message generated for change (Settings changed) made by veplaini
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Category: Opcodes
Group: csound5
>Status: Open
>Resolution: None
Priority: 5
Private: No
Submitted By: David Bluecame (david-bluecame)
Assigned to: Michael Gogins (gogins)
Summary: Csound5.13.0 noise when using JackoAudioOut
Initial Comment:
Hello.
When using the JackoAudioOut opcode to connect to another jack program, the csound output is just a very annoying noise.
I've found the problem in the file "jacko.cpp"
[...]
struct JackoAudioOut : public OpcodeBase
{
[...]
int audio(CSOUND *csound)
{
jack_default_audio_sample_t *buffer = (jack_default_audio_sample_t *)jack_port_get_buffer(csoundPort, csoundFramesPerTick);
for (size_t frame = 0; frame < csoundFramesPerTick; ++frame) {
buffer[frame] += asignal[frame]; // <--- THIS IS THE PROBLEM!!!
[...]
>From what I've seen, the problem is in the line:
buffer[frame] += asignal[frame];
It's adding the new frames to the old ones instead of replacing them. The correct line should be:
buffer[frame] = asignal[frame];
I have recompiled it by using that fix and it works, no more noise and the correct sound output! :-))
I hope this is useful. Best regards!!
David Bluecame.
----------------------------------------------------------------------
Comment By: Victor Lazzarini (veplaini)
Date: 2011-05-01 08:37
Message:
I will defer this to the opcode author. These opcodes are special in that
they control the whole csound performance and the question of buffer
clearing might arise from this special setup. I am assigning the bug to
him.
----------------------------------------------------------------------
Comment By: Victor Lazzarini (veplaini)
Date: 2011-04-30 19:32
Message:
fixed in sources; thanks for the report and fix.
----------------------------------------------------------------------
Comment By: David Bluecame (david-bluecame)
Date: 2011-04-30 19:14
Message:
Still not perfect, when I restart the csound score, there is a brief noise
in the beginning, maybe some buffer cleaning is needed? Please, tell me if
it's also happening to you after the first fix is applied.
Thank you and best regards. David Bluecame.
----------------------------------------------------------------------
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https://sourceforge.net/tracker/?func=detail&atid=564599&aid=3295456&group_id=81968
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