While writing a quick test application to record microphone input and playing that same recording, I found out that playing back a ByteArray directly using the Sound class wasn’t possible. Luckily a solution is never far away when doing a Google search and it turns out that FlexibleFactory has a good solution: the MP3FileReferenceLoader lib. With a bit of tweaking you can pass in a ByteArray directly and don’t need to rely on a FileReference.

Good news though! As per Flash Player 11, the following 2 methods have been added to the (native) Sound class that can be used to achieve the same behaviour:

• Sound.loadCompressedDataFromByteArray(bytes:ByteArray, bytesLength:uint)
• Sound.loadPCMFromByteArray(bytes:ByteArray, samples:uint, format:String = “float”, stereo:Boolean = true, sampleRate:Number = 44100.0)