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Jimmy Lapierre

Last seen: 12 days ago Active since 2018

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  • 3 Month Streak
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Answered
Sound Pressure level returning -inf
Leq, Lpeak and Lmax are only computed every TimeInterval, so they correspond to the SPL of zero for the first 0.125 seconds. And...

28 days ago | 1

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Answered
how to compute the RMS dB(A) value from an acoustic signal in a spectrum ?
It might just be a matter of scaling. For example, if there is a microphone involved, you may need to calibrate for that if the ...

1 month ago | 0

Answered
What is dBFS in the Impulse Response Measurer App?
Hi Yuqing, If you use the Export button, you will get a table of your measurements including the recording. You can get an exc...

1 month ago | 0

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Answered
Will MATLAB VST plugin generation support ARA (Audio Random Access) API?
There is no support at this time, but users with Coder can use the "juceproject" option to produce a JUCE project, which support...

3 months ago | 1

Answered
Real-Time Audio Processing: Varying Delay Depending on Initial Under/Overruns
Some updates since these issues were raised: Starting 21b, Audio Toolbox I/O has a new buffering mechanism to prevent the laten...

4 months ago | 0

Answered
audio codec performance measurement DAQ
Hi, I think the Spectrum Analyzer could help. Here is an example: https://www.mathworks.com/help/dsp/ug/spectrum-analyzer-measu...

4 months ago | 0

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Answered
Only one channel from two-channel Behringer UCA202
1. Try specifying the name of the device as well, in case you are picking up another (mono) device instead of you UCA202. >> a...

5 months ago | 0

Answered
Microsoft Visual Studio 2022 set up as default C and C++ compiler in Matlab 2021a
Plugin generation is part of the Audio Toolbox, which does not support MinGW. For plugins: VS 2019 was added to R2019b (appears...

6 months ago | 0

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Answered
(solved) Why can't I generate an audio plugin from the StereoWidth example?
I see you found a solution. Just for reference, here is a list of supported compilers for Audio and other toolboxes (there is a ...

7 months ago | 1

Answered
audio input that is not recognize by matlab
Hi Fanny, First is to make sure the OS recognized the input devices. If on Windows, check that your devices show up in "Sound s...

7 months ago | 0

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Answered
Impulse Response Measurer: Amplitude of recorded signal is almost half compared to recording in audacity
Playback level in the impulseResponseMeasurer is controlled by the "Excitation Level (dBFS)" setting in the toolbar. Does settin...

8 months ago | 1

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Answered
Impulse Response Measurer in audio toolbox
Yes, sound is output on the selected device and channel. If there is a loudspeaker connected to that device, it will play. But i...

8 months ago | 0

Answered
How to access 'non-automatable' parameters in a AU/VST in MATLAB with `loadAudioPlugin()`?
Hi Jamie, The ability to display the plugin's custom GUI is not currently available. If you'd like to share what's your affilia...

8 months ago | 0

Answered
How can i fix this error in the Impulse Response Measurer?
Hi Mehmet, could you try increasing the “Duration per run” relative to the “sweep duration”. The sweep methods requires this per...

9 months ago | 1

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Answered
Parameters for room impulse response measurements using swept sine
Hi Jon, Since you do not have access to MATLAB on site, you will want to use sweeptone to create the exponential swept sine tha...

1 year ago | 1

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Answered
Sending a midi message from MATLAB to an external source audio plug in
If you want to use MIDI (as opposed to loading a plugin), have a look at midimsg. Just note that we don't support loading VSTi p...

1 year ago | 0

Answered
How to use synthesizer VST plugin after loading it using loadAudioPlugin function?
Unfortunately we do not support VSTi (MIDI instruments) at this time.

1 year ago | 0

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Answered
How do I interrupt a sound file that is currently being played?
You should write your audio samples by smaller frames (such as 1024 samples per frame). That way, you can stop writing at any ti...

1 year ago | 0

Answered
How do I play more than one sound file concurrently with audioDeviceWriter?
If you use audioDeviceWriter (or audioPlayerRecorder), you need to manage each frame yourself, including adding any signals that...

1 year ago | 0

Answered
Audio toolbox: using acousticLoudness() in reverse for "normalizing" audio signal
If you want average perceived loudness, consider omitting the time-varying option even though the signal isn't stationary. Othe...

1 year ago | 2

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Answered
How do I implement this code to the example called Active Noise Control Using a Filtered-X LMS FIR Adaptive Filter?
Hi Sean, I'll suggest that you also have a look at the Real-Time Example (linked here). The beginning of that example gives deta...

1 year ago | 0

Answered
Audio plugin not compiling after update to Xcode 11.4
The list of supported compilers can be found on this webpage. Either click the "Mac" tab for supported Xcode versions, or for pr...

1 year ago | 0

Answered
Audio toolbox for active speaker crossover
Q. Could an audio model pick up audio from another application, e.g. amazon music, apply the filters and stream out to the sound...

2 years ago | 0

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Answered
How to use audioDeviceWriter ?
I suspect that compexp returns a row vector instead of a column vector, so it looks like 1024 channels. Try pre-allocating y bef...

2 years ago | 0

Answered
SampleRateConvertion error in plugin
Hi Pablo, There are some limitations with codegen and the resampling objects. If you have a hard-coded ratio of 4, the easiest ...

2 years ago | 0

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Answered
audioPlayerRecorder PlayerChannelMapping not working as expected
The behavior of channel mapping with single channels depends on the driver (for example, it is different for ASIO and DirectSoun...

2 years ago | 0

Answered
Help, generateAudioPlugin Error
Xcode 11.4 introduced an incompatibility, so you would need to make sure you have the latest update (19b update 5, required for ...

2 years ago | 0

Answered
VST Plugin with Visual Studio 2019
Support for plugin generation Visual Studio 2019 was added in 2019b Update 5. Please let me know if you have the latest updates ...

2 years ago | 1

Answered
interpolateHRTF always trows warnings or errors when using either methods
Can I ask what version of Matlab you are using? If you can provide some sample code, it might also help. Does the help example ...

2 years ago | 0

Answered
ANC Simulink Model Error
Hi Olivia, it sounds like your device is incapable of ultra-low latency operation. Unless the noise to cancel is steady-state an...

2 years ago | 0

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