Question

I need to implement audio streaming on iPhone with latency lower than 50 millisecond .

Any ideas on how I can make it work?

I bumped into:
http://cocoawithlove.com/2009/06/revisiting-old-post-streaming-and.html

But it’s very important to me to know that the latency will be very low.

thanks

Answer 1

One way to minimize latency on the receiving end is to use the RemoteIO Audio Unit with very short buffers, and feed it from raw PCM audio or a decompressor for an audio format that requires extremely low computational complexity to decode, as well as small packets.

You pretty much need complete control over the entire network source and path, including hand picking all the equipment, as any router or access point can completely destroy latency by buffeting packets or prioritizing other traffic, etc.

You probably want to use UDP for the IP protocol, with a packet size tuned to your network equipment and to the audio buffer size.