Hi all,
I have two patches. One is my "stable" version and the other is the "development" one. They are similar, but I've made many changes.
However, this development version now makes this click sound (attached or in www.jaimeoliver.pe/misc/click.zip) The click happens when editing, saving or sending control messages to the audio modules. Deleting the audio modules eliminates the problem, but I need those.
Anyone has any idea where to look for possible problems?
best,
J
Hi Jamie
Am I right in thinking, that you get this click even while all your audio modules are silent? At least, that is what the click.wav file suggests.
I assume there are two things involved that cause the clicking:
- When doing "a lot" within 0 logical time, you'll get audio drop outs,
because the computer is not fast enough doing the requested task in the defined time frame (which is: your buffer size). This often happens while loading or saving presets.
- It seems one or more of your audio modules contain a bit of DC
('direct current' or constant) in their signal. Make sure to avoid that whenever possible, since DC decreases the dynamic range available and makes your amps and speakers consume a lot of energy without any benefit.
Now, if you really have a certain amount of DC going to your [dac~] and there is a drop-out (see reasons above), this will be audible, because during the drop-out the signal switches to 0 and after the drop-out back to the DC level. I think that is the reason for your clicks.
For a quick test, you could put a [hip~ 5] right before the [dac~] and check if the clicking still occurs. A high-pass filter will remove any DC components from the signal, but the better solution would be not to generate a DC in the first place.
Roman
On Tue, 2011-06-28 at 04:00 -0700, Jaime Oliver wrote:
Hi all,
I have two patches. One is my "stable" version and the other is the "development" one. They are similar, but I've made many changes.
However, this development version now makes this click sound (attached or in www.jaimeoliver.pe/misc/click.zip) The click happens when editing, saving or sending control messages to the audio modules. Deleting the audio modules eliminates the problem, but I need those.
Anyone has any idea where to look for possible problems?
best,
J
Pd-list@iem.at mailing list UNSUBSCRIBE and account-management -> http://lists.puredata.info/listinfo/pd-list
Hi Roman,
Indeed DC...
It was an oscillator with uninitialized frequency and its own dac that I put in a sub-patch to get reference pitches and forgot about it completely.
thanks,
J
On Tue, Jun 28, 2011 at 5:59 AM, Roman Haefeli reduzent@gmail.com wrote:
Hi Jamie
Am I right in thinking, that you get this click even while all your audio modules are silent? At least, that is what the click.wav file suggests.
I assume there are two things involved that cause the clicking:
- When doing "a lot" within 0 logical time, you'll get audio drop outs,
because the computer is not fast enough doing the requested task in the defined time frame (which is: your buffer size). This often happens while loading or saving presets.
- It seems one or more of your audio modules contain a bit of DC
('direct current' or constant) in their signal. Make sure to avoid that whenever possible, since DC decreases the dynamic range available and makes your amps and speakers consume a lot of energy without any benefit.
Now, if you really have a certain amount of DC going to your [dac~] and there is a drop-out (see reasons above), this will be audible, because during the drop-out the signal switches to 0 and after the drop-out back to the DC level. I think that is the reason for your clicks.
For a quick test, you could put a [hip~ 5] right before the [dac~] and check if the clicking still occurs. A high-pass filter will remove any DC components from the signal, but the better solution would be not to generate a DC in the first place.
Roman
On Tue, 2011-06-28 at 04:00 -0700, Jaime Oliver wrote:
Hi all,
I have two patches. One is my "stable" version and the other is the "development" one. They are similar, but I've made many changes.
However, this development version now makes this click sound (attached or in www.jaimeoliver.pe/misc/click.zip) The click happens when editing, saving or sending control messages to the audio modules. Deleting the audio modules eliminates the problem, but I need those.
Anyone has any idea where to look for possible problems?
best,
J
Pd-list@iem.at mailing list UNSUBSCRIBE and account-management -> http://lists.puredata.info/listinfo/pd-list
-
Jaime Oliver -
Roman Haefeli