shawn/op-pedal
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

Revised pipedal_latency_text documentation

Browse Source 
The example needs to say "hw:M2"
This commit is contained in:
Robin E. R. Davies
2024-11-21 00:46:48 -05:00
parent 0ca7545b3f
commit aca96317a8
2 changed files with 17 additions and 15 deletions
Download Patch File Download Diff File Expand all files Collapse all files
src/PiLatencyMain.cpp
+16 -9
View File
@@ -50,13 +50,15 @@ struct TestResult
void PrintHelp()
{
PrettyPrinter pp;
pp.width(160);
pp.width(78);
pp << "PiPedal Latency Tester\n";
pp << "Copyright (c) 2022 Robin Davies\n";
pp << "\n";
pp << Indent(0) << "Syntax\n\n";
pp << Indent(4) << "pipedal_latency_test [<options>] <device-name>\n\n";
pp << Indent(2) << "pipedal_latency_test [<options>] <device-name>\n\n";
pp << "where <device-name> is the name of an ALSA device. Typically this should be the name of a hardware "
"device (a device name starting with 'hw:').\n\n";
pp << Indent(0) << "Options\n\n";
pp << Indent(15);
@@ -73,21 +75,26 @@ void PrintHelp()
<< "Display this message.\n\n";
pp << Indent(0) << "Remarks\n\n";
pp << Indent(4);
pp << "PiPedal Latency Tester measure actual audio latency from output to input of an ALSA device. "
pp << Indent(2);
pp << "PiPedal Latency Tester measures actual audio latency from output to input of an ALSA device.\n\n"
<< "To run a latency test, you must connect an audio cable from left (first) output of the device "
"under test to the left (first) input of the device under test.\n\n"
<< "PiPedal Latency Tester will measure the time it takes for a signal to propagate from output to input.\n\n"
<< "PiPedal Latency Tester measures internal buffer delays as well as operating system and "
<< "signal delays in hardware peripherals. Latency figures will therefore be somewhat higher than "
<< "most reported latency figures which typically only include internal buffer delays.\n\n";
pp
<< "The tests run over a variety of buffer sizes. A nominal compute load is provided in order to put some "
"stress on the audio system.\n\n"
<< "You may need to stop the pipedald audio service in order to access the ALSA device:\n\n"
<< Indent(8) << "sudo systemctl stop pipedald\n\n";
<< Indent(6) << "sudo systemctl stop pipedald\n\n";
pp << Indent(0) << "Examples\n\n";
pp << Indent(4) << "pipedal_latency_test --list\n\n";
pp << Indent(4) << "pipedal_latency_test M2\n\n";
pp << Indent(2) << "pipedal_latency_test --list\n\n";
pp << Indent(2) << "pipedal_latency_test hw:M2\n\n";
}
void ListDevices()