CODEWITHSUNDEEP
c#audiounity-game-engine
Danny Herbert
Danny Herbert

Reputation: 2031

Generating audio at input of AudioSource

I would like to generate audio at the input of an AudioSource in Unity.

I have tried using the OnAudioFilterRead() MonoBehaviour but this only allows you to alter the audio data after the AudioSource, which bypasses any spatialisation/pitching/gain etc on the AudioSource component.

I also had the idea of using an AudioClip as a buffer, filling it with the audio data and then loading that into the AudioSource, but I don't think this could be done without knowing the buffer size and being able to load a new clip as each buffer is read. There is no method to read into the AudioClip as each new buffer is required.

Is there any way to change the audio data of AudioSource before it goes through the audio source's spatialisation/pitching/gain etc?

Upvotes: 1

Views: 552

Answers (1)

Danny Herbert
Danny Herbert

Reputation: 2031

I solved this myself. It was a silly mistake. After reading the Docs for OnAudioFilterRead properly I found that it states:

The audio data is an array of floats ranging from [-1.0f;1.0f] and contains audio from the previous filter in the chain or the AudioClip on the AudioSource. If this is the first filter in the chain and a clip isn't attached to the audio source this filter will be 'played'. That way you can use the filter as the audio clip, procedurally generating audio.

I had an audio clip in the AudioSource which stopped the OnFilterRead being the first process in the DSP chain. Removing the audio clip fixed the problem!

Upvotes: 1

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