Hello, latency delay is noticeable at ~25ms, below there are artefacts grain caused by phase decay if the source and the processed signal are played together at the same place with almost same amplitude.
11ms is only the buffer size, and other elements in sound processing need to be taken in consideration like the distance expressed by the sound speed in the air (about 340m/s at sea level 15°C), so you can add about 3ms per meter, also almost all effects needs a processing window so the more processing power you have, the lower the achievable latency.
Any other digital processor added to this chain would add latency, like digital guitar pedals and amplifiers.
The dsp needs realtime access, so the Operating System have to be configured for giving high priority to PureData, and a low latency audio driver needs to be used directly from pd or through jack, anyhow there are much possibilities with jack server.
Selon Pierre Massat pimassat@gmail.com:
Hi Jeffrey! I ve been trying to minimize latency in Pd for a year now, experimenting with various OS and hardware. I m using Pd for the same purpose, that is live processing of electric instruments (mainly a guitar).
2010/1/31 Derek Holzer derek@umatic.nl
"Unnoticeable" latency usually refers to the musician not noticing the difference in time between when they press the key and when the sound comes
even the un-processed signal goes through Pd to avoid echos or comb filtering due to latency.
Jeffrey Concepcion wrote:
type of effect)? i've read that 11ms can be achieved and is unnoticeable.