Hi, Ron. I made a Multi-FX Looper Machine (MEH-SYSTEM) with KP3 recording looping style and LOOP-STATION one too (different ways of recording and looping, http://www.youtube.com/watch?v=2KIj7O_N3gU, in spanish, sorry)

When checking synching, I realized that, when some sample (previously recorded) was playing (eg, beatbox), I recorded in another sample bank, and, when it started to play, it was unsynched. Why? Because of the playing-when-recording latency and the later-playing latency. How did I fix it? After recording, it starts playing advanced some miliseconds (*): aproximatly the same of your latency. Mine is 14ms (Jack, 128 frames/buffer). How did I know my latency or, better, how many ms I should add to the playing? (because, depends on the patch, the minimum latency could be different (less) than the final latency of the patch). Using latency-meter (from Katja http://puredata.hurleur.com/viewtopic.php?pid=38375#p38375) and some testing abstracts with visual arrays and adjustable new latency.

I hope this were usefull for you. If you need something else, just ask!

(*) I use phasor~. Once it is configured to play at specific sample lenght and velocity, I send 14 (with some math), to start in that place: advanced.

On 03/12/13 03:22, Ron I. wrote:

Hello - we are playing a metronome audio file at time intervals (bpm) while simultaneously recording an audio track. Currently we can't get perfect sync between the two.

We are using iOS, and I wanted to reach out to the PD community, to see if there are any developers who can help with a consulting gig to get the metronome and recording process synced, which is crucial for the rest of our app!

Thanks

Ron
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