X-Git-Url: http://shamusworld.gotdns.org/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=include%2Flatency-and-latency-compensation.html;h=c688393932b10e9825efcb9ab1aea42b3ebd2f29;hb=88d6f39b5f8b0f791b6833bb1512aa774b59d4f8;hp=fda8ec96e83b1de231dc32f266a08e65760a785e;hpb=7a4c28bd8605e90876ebee619de364ab7001e405;p=ardour-manual diff --git a/include/latency-and-latency-compensation.html b/include/latency-and-latency-compensation.html index fda8ec9..c688393 100644 --- a/include/latency-and-latency-compensation.html +++ b/include/latency-and-latency-compensation.html @@ -45,9 +45,9 @@ Latency chain

- Figure: Latency chain. - The numbers are an example for a typical PC. With professional gear and an - optimized system the total roundtrip latency is usually lower. The important + Figure: Latency chain. + The numbers are an example for a typical PC. With professional gear and an + optimized system the total round-trip latency is usually lower. The important point is that latency is always additive and a sum of many independent factors.

@@ -55,7 +55,7 @@ Processing latency is usually divided into capture latency (the time it takes for the digitized audio to be available for digital processing, usually one audio period), and playback latency (the time it takes for - In practice, the combination of both matters. It is called roundtrip + In practice, the combination of both matters. It is called round-trip latency: the time necessary for a certain audio event to be captured, processed and played back.

@@ -78,7 +78,7 @@

-

Low Latency usecases

+

Low Latency use cases

Low latency is not always a feature you want to have. It comes with a couple of drawbacks: the most prominent is increased power @@ -180,7 +180,7 @@ edge of the JACK graph (capture)?

  • - How long will it be until the data writen to port Ao or Bo arrives at the + How long will it be until the data written to port Ao or Bo arrives at the edge of the JACK graph (playback)?
  • @@ -201,7 +201,7 @@

    Calibrating JACK Latency

    Linux DSP guru Fons Adriaensen wrote a tool called jack_delay - to accurately measure the roundtrip latency of a closed loop audio chain, + to accurately measure the round-trip latency of a closed loop audio chain, with sub-sample accuracy. JACK itself includes a variant of this tool called jack_iodelay.

    @@ -236,7 +236,7 @@

    1. Launch jackd with the configuration you want to test.
    2. -
    3. Launch jack_delay on the commandline.
    4. +
    5. Launch jack_delay on the command line.
    6. Make the appropriate connections between your jack ports so the loop is closed.
    7. Adjust the playback and capture levels in your mixer.