B4J Question DirectX equivalent library

D

Didier99

Member
Licensed User
I have an old VB 6.0 project where I used DirectX to acquire sound sample data and generate sound, a bit similarly to a spectrum analyser (doing FFT and such on the received signal) and also generating fixed frequency sounds. The application was a low frequency vector network analyser.
I would like to see if I can create a B4J version of that software. Is there any recommendation for a suitable library?
TIA
 
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zed

Well-Known Member
Licensed User
B4J does not have a built-in FFT library, but you can use Java libraries like JTransforms or FFT implementations available on the B4X forum.

Perhaps this will be useful to you.

recognize a sound with the FFT library

Hello I would like to recognize a sound (beep) that is in a wav file and compare it with a direct sound! how to do it ?
www.b4x.com

GitHub - wendykierp/JTransforms: JTransforms is the first, open source, multithreaded FFT library written in pure Java.

JTransforms is the first, open source, multithreaded FFT library written in pure Java. - wendykierp/JTransforms
github.com

Maven Repository: org.openimaj » JTransforms

mvnrepository.com
 
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D

Didier99

Member
Licensed User
zed said:
B4J does not have a built-in FFT library, but you can use Java libraries like JTransforms or FFT implementations available on the B4X forum.
Click to expand...
I do not need an FFT library, most of those I have come across don't do exactly what I need (I need the phase information), and I already have written the FFT code I need in the original VB project.
What I do not have is a library to acquire the sound samples (16 bit stereo at a selectable bit rate).

But thanks for the links, they may be useful.
 
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zed

Well-Known Member
Licensed User
or this:

[B4j] jAudioRecord2

This is an new version of the jAudioRecord library (but not a direct plugin replacement) provided as a b4xlib and uses current B4x practices and classes. It allows selection of audio inputs and capturing directly to file or to a byte array so you can process the data further. The library no...
www.b4x.com
Otherwise, I don't see it.
 
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D

Didier99

Member
Licensed User
Perfect!
Thanks a bunch!
 
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