A quick and dirty method to measure the sum of input + output latency is to feedback the speaker output to mic input and then measure the time from an impulse out to the time when the impulse is received back in. Of course this does not isolate the component times, but it gives a rough estimate of the combined latency.
For more accurate measurements of audio output latency, one method is to send an impulse through audio out at same time as a known low latency path (for example a level change on a GPIO parallel output pin), and compare the times to see the audio impulse out and the level change. A similar method, in reverse, could be used for audio input. On Mar 14, 12:20 pm, "David O." <ave...@gmail.com> wrote: > Is there a standardized/preferred method for validating the section > 5.3 Audio Latency requirements? It's not clear to me if CTS covers > audio latency testing. > > Thanks, > David -- unsubscribe: android-porting+unsubscr...@googlegroups.com website: http://groups.google.com/group/android-porting
