Audio format importing

Unity Engine
1

Hi,

Would it be ok to ask a question here (apologies if in incorrect forum section), regarding Audio format importing.
Older Unity versions only allow for .wav file audio import (at runtime) to my understanding, not .mp3 I believe due to licensing issues…
Will the 2020 version allow this, or can this be handled differently?

2

You can find a list of the supported formats in the manual. Mp3 has at least been supported since 5.2.

3

Hello LeonhardP, many thanks for your help. I will proceed to look for a sample script/how to, to be able to load external mp3’s into my game scene. The intent was to use a asset/plugin called audioimporter but if there is a native/easier way I would prefer that.

4

You can just drop the file into the project pane as with any other asset. Or are you talking about loading them at runtime?

5

Hi,I need to load at runtime.

6

You can use CSCore or NAudio to retrieve the samples from the audio file, which you feed into the PCMReaderCallback delegate on a runtime-created AudioClip. Here’s some example code taken from a project I’m working on, it uses the ISampleSource API from CSCore:

void PcmSetPositionCallback(int position)
{
    if (isDisposed || !SampleSource.CanSeek)
        return;

    SampleSource.Position = (long)position * SampleSource.WaveFormat.Channels;
}

void PcmReaderCallback(float[] samples)
{
    if (isDisposed)
        return;

    for (int offset = 0, remaining = samples.Length; remaining > 0;)
    {
        int n = SampleSource.Read(samples, offset, remaining);

        if (n <= 0)
            break;

        offset    += n;
        remaining -= n;
    }
}

Hope that’s useful.