B4J Question AudioRecord

[Philip Prins]

Hello ,

Is there a way to record audio from the microphone without the threading library?

Regards
Philip

 

[stevel05]

Have a look at this version Thread '[B4j] jAudioRecord2' https://www.b4x.com/android/forum/threads/b4j-jaudiorecord2.142154/

 

[Philip Prins]

Hello Steve,

I have looked at it but could not figure out to send the audio in a byte array.
I use AudioRecord and send the AR buffer over UDP to a server.
But there is a rattling noise on the receiving end.

When i send the same from an Android device the audio is clear.

 

[stevel05]

But there is a rattling noise on the receiving end.

If the rattling are clicks and pops, it may not be fast enough to capture the audio on the Gui thread, and will need the threading library.

 

[stevel05]

For streaming you will probably get better performance with the AudioStreamer object from the Audio Library: https://www.b4x.com/android/forum/threads/audio-library-v1-5-new-audiostreamer-object.30550/

 

[Philip Prins]

For streaming you will probably get better performance with the AudioStreamer object from the Audio Library: https://www.b4x.com/android/forum/threads/audio-library-v1-5-new-audiostreamer-object.30550/

Hello Steve,

I works on the Android side.
On the B4J side i use the example from you with threading.
With one exception that i use a OPUS library to convert the PCM to OPUS.

 

[stevel05]

I am not familiar with opus, but if it's adding more processing to the chain it could quite easily cause latency in the signal path.

 

[Philip Prins]

I will try without OPUS.

So there is no other alternative without threading?

 

[stevel05]

So there is no other alternative without threading?

The AudioStreamer I linked to earlier.

 

[Philip Prins]

The AudioStreamer I linked to earlier.

Can this be used with B4J on a PC?

 

[stevel05]

Sorry linked to the wrong one, you could.try this one https://www.b4x.com/android/forum/threads/jaudiostreamer-library.146107/

 

[Philip Prins]

Thanks Steve,
I will try that one