Hello!
I’m attempting to use the pd~ object for the first time on a Raspberry Pi, with the idea of taking advantage of the multiple CPU cores.
I’m using a Pi 3 with the latest 64bit “headless” OS, running Pd 0.53.1 (installed via apt-get). My understanding is that using the pd~ object should run each instance of a patch on a different core of the Pi.
Here’s the test patch: https://github.com/yannseznec/multicoreTest
On the command line, i'm attempting to run the "multiTest.pd" file like so: pd -nogui multiTest.pd
Pd launches and it gives me the message "pd~ version 0.54" but there is no sound.
Running only the subpatch (rand_osc.pd) produces a single sine tone as expected.
Am I using the pd~ object incorrectly, or misunderstanding something about how this should all work?
Thanks!
Yann
Yann, trying your patch on a Pd with Gui also does not produce a sound (for me). Can you test your patch on a computer with gui first maybe?
best, P
- Yann Seznec yann@yannseznec.com [2024-10-10 12:58]:
Hello!
I’m attempting to use the pd~ object for the first time on a Raspberry Pi, with the idea of taking advantage of the multiple CPU cores.
I’m using a Pi 3 with the latest 64bit “headless” OS, running Pd 0.53.1 (installed via apt-get). My understanding is that using the pd~ object should run each instance of a patch on a different core of the Pi.
Here’s the test patch: https://github.com/yannseznec/multicoreTest
On the command line, i'm attempting to run the "multiTest.pd" file like so: pd -nogui multiTest.pd
Pd launches and it gives me the message "pd~ version 0.54" but there is no sound.
Running only the subpatch (rand_osc.pd) produces a single sine tone as expected.
Am I using the pd~ object incorrectly, or misunderstanding something about how this should all work?
Thanks!
Yann
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I haven't looked at the test patch but I'm pretty sure the problem is that you didn't turn on DSP on the parent patch.
The reason is that [pd~] object is driven from the parent patch. This is also mentioned in the help patch:
"ATTENTION: DSP must be running in this process for the sub-process to start and run. This is because its clock is slaved to audio I/O it gets from us!"
Christof
On 10.10.2024 12:31, Yann Seznec wrote:
Hello!
I’m attempting to use the pd~ object for the first time on a Raspberry Pi, with the idea of taking advantage of the multiple CPU cores.
I’m using a Pi 3 with the latest 64bit “headless” OS, running Pd 0.53.1 (installed via apt-get). My understanding is that using the pd~ object should run each instance of a patch on a different core of the Pi.
Here’s the test patch: https://github.com/yannseznec/multicoreTest
On the command line, i'm attempting to run the "multiTest.pd" file like so: pd -nogui multiTest.pd
Pd launches and it gives me the message "pd~ version 0.54" but there is no sound.
Running only the subpatch (rand_osc.pd) produces a single sine tone as expected.
Am I using the pd~ object incorrectly, or misunderstanding something about how this should all work?
Thanks!
Yann
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Ok, I should have looked at the patch first... DSP is turned on, so that is not the problem.
The problem is simply that the subprocesses are not started because you forgot to connect the [pd~ start( message to a loadbang :)
When I click the bang object, I can hear low sine tones.
Christof
On 10.10.2024 13:39, Christof Ressi wrote:
I haven't looked at the test patch but I'm pretty sure the problem is that you didn't turn on DSP on the parent patch.
The reason is that [pd~] object is driven from the parent patch. This is also mentioned in the help patch:
"ATTENTION: DSP must be running in this process for the sub-process to start and run. This is because its clock is slaved to audio I/O it gets from us!"
Christof
On 10.10.2024 12:31, Yann Seznec wrote:
Hello!
I’m attempting to use the pd~ object for the first time on a Raspberry Pi, with the idea of taking advantage of the multiple CPU cores.
I’m using a Pi 3 with the latest 64bit “headless” OS, running Pd 0.53.1 (installed via apt-get). My understanding is that using the pd~ object should run each instance of a patch on a different core of the Pi.
Here’s the test patch: https://github.com/yannseznec/multicoreTest
On the command line, i'm attempting to run the "multiTest.pd" file like so: pd -nogui multiTest.pd
Pd launches and it gives me the message "pd~ version 0.54" but there is no sound.
Running only the subpatch (rand_osc.pd) produces a single sine tone as expected.
Am I using the pd~ object incorrectly, or misunderstanding something about how this should all work?
Thanks!
Yann
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Christof Ressi -
Peter P. -
Yann Seznec