X-Git-Url: http://shamusworld.gotdns.org/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=include%2Flatency-and-latency-compensation.html;h=f14fc0e917bcc2b59562018251549a8dc00a10d5;hb=e74c09802c2ca4038144d051c425a65661bde3ea;hp=89a6e1ed6672c23b28f5172a9425936cbd58f644;hpb=d3016470f888ab4b0ee20d7e5040f4b37a655c3c;p=ardour-manual diff --git a/include/latency-and-latency-compensation.html b/include/latency-and-latency-compensation.html index 89a6e1e..f14fc0e 100644 --- a/include/latency-and-latency-compensation.html +++ b/include/latency-and-latency-compensation.html @@ -45,6 +45,11 @@

The Latency chain

+ +

+ Note! the rest of this document assumes the use of jackd for the audio + backend. While many of the concepts are true, the specifics may be different. +

Latency chain
@@ -66,7 +71,7 @@ processed and played back.

- It is important to note that processing latency in a jackd is a matter of + It is important to note that processing latency in Ardour is a matter of choice. It can be lowered within the limits imposed by the hardware (audio device, CPU and bus speed) and audio driver. Lower latencies increase the load on the system because it needs to process the audio in smaller chunks @@ -91,7 +96,7 @@ consumption because the CPU needs to process many small chunks of audio data, it is constantly active and can not enter power-saving mode (think fan noise). Since each application that is part of the signal chain must run in every - audio cycle, low-latency systems will undergocontext switches + audio cycle, low-latency systems will undergo context switches between applications more often, which incur a significant overhead. This results in a much higher system load and an increased chance of xruns.

@@ -156,7 +161,7 @@ The second approach is prone to various implementation issues regarding timecode and transport synchronization. Ardour uses read-ahead to compensate for latency. The time displayed in the Ardour clock corresponds - to the audio signal that is heared on the speakers (and is not where Ardour + to the audio signal that is heard on the speakers (and is not where Ardour reads files from disk).