record-audio | A simple audio recording API | Audio Utils library

I tried the same piece of code on a Raspberry that i had previously installed Ubuntu 20. As expected the script was working fine. So in conclusion it is a Raspberry Pi OS issue and not an error on code. Also the simplest form of this pipeline can be achieved with:

I would keep the complete Java implementation in actual Java, you can do this by creating a java file in your plugin folder: platforms/android/java, so maybe something like: platforms/android/java/org/nativescript/AudioRecord.java

In there you can do everything threaded, so you won't be troubled by the UI being blocked. You can call the Java methods directly from NativeScript for starting and stopping the recording. When you build your project, the Java file will automatically be compiled and included.

You can generate typings from your Java class by grabbing classes.jar from the generated .aar file of your plugin ({plugin_name}.aar) and generate type declarations for it: https://docs.nativescript.org/core-concepts/android-runtime/metadata/generating-typescript-declarations

This way you have all the method/class/type information available in your editor.

I suggest to analyze the nature of the echo you are having in your system (for example test the echo path). Perhaps it is outside the capabilities of your built-in echo cancellation.

This is not what localStorage is meant for. localStorage can only store strings and can only accommodate a small amount of date.

If you're really determined to do this you need to:

• load the mp3 file into an ArrayBuffer
• encode the ArrayBuffer into Base64
• Store the Base64 encoded string in localStorage

Note that Base64 encoding usually increases the size of the source material by about 33%. This is because it can take any kind of data, including binary, and converts it to a string made of a 64 character set that's compatible with standard ASCII strings.

To play it back, you need to the opposite

• retrieve the Base64 encoded string from localStorage
• decode the Base64 string into an ArrayBuffer
• load the ArrayBuffer into an Audio object
• assign the Audio object to an element

It should also be noted that localStorage is often only given 5-10MB of storage space, depending on the browser. This can be tested here, but generally, keep your mp3 files small by encoding them with lower bit rates, use mono instead of stereo channels where possible, and reduce sample rate if the audio is just spoken words and not music.

The struct class keeps a cache of items for faster access. The only way to clear the struct cache is to call the struct._clearcache() method. An example of this being used can be found here.

Warning! This is a _ method and could change at any time. See here for and explanation of these types of methods.

There is a discussion about this 'memory leak' on the python forums here and here.

First of all, you should add some checks to make sure you won't get post flooded. The minimal way to do this would be by making sure the POST comes from the same server IP (though there are several ways to spoof that):