<div>Yes of course ! physical input/output should be patched. Thanks. How could I've missed that !</div><div><br></div><div>Just to make sure : when you say that the following sentence is wrong :</div><div><br></div><div>
"<span class="Apple-style-span" style="font-family: arial, sans-serif; font-size: 13px; border-collapse: collapse; ">#3 : patch connections in jack : input -> jdelay, jdelay -> output, you </span><span class="Apple-style-span" style="font-family: arial, sans-serif; font-size: 13px; border-collapse: collapse; ">should get a tone in your speakers"</span></div>
<div><span class="Apple-style-span" style="font-family: arial, sans-serif; font-size: 13px; border-collapse: collapse; color: rgb(80, 0, 80); "><br></span></div><div><span class="Apple-style-span" style="font-family: arial, sans-serif; font-size: 13px; border-collapse: collapse; color: rgb(80, 0, 80); "></span>you were refering to the tone part, right ? you mean that physical connections should ALSO be made, i guess. Because if there are no connections in jack such as I discribed<span class="Apple-style-span" style="font-family: arial, sans-serif; font-size: 13px; border-collapse: collapse; "> signal won't get in or out, and thus Jdelay won't be able to calculate latency.</span></div>
<div><font class="Apple-style-span" face="arial, sans-serif"><span class="Apple-style-span" style="border-collapse: collapse;"><br></span></font></div><div><br><div class="gmail_quote">2010/8/3 Paul Davis <span dir="ltr"><<a href="mailto:paul@linuxaudiosystems.com">paul@linuxaudiosystems.com</a>></span><br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;"><div class="im">On Tue, Aug 3, 2010 at 7:02 AM, Jean-Yves Poilleux <<a href="mailto:jypllx@gmail.com">jypllx@gmail.com</a>> wrote:<br>
> Hi<br>
> Actually, there is some info that can be found here and there on some forums<br>
> (see below)<br>
> JDelay is, from what I've understood, a command-line tool that allows you to<br>
> determine your sound card latency.<br>
> #1 : start jack<br>
> #2 : type jdelay in a terminal<br>
> #3 : patch connections in jack : input -> jdelay, jdelay -> output, you<br>
> should get a tone in your speakers<br>
<br>
</div>this is totally and utterly wrong. you have to patch the PHYSICAL<br>
output connector of your soundcard to the PHYSICAL input of your<br>
soundcard.<br>
<div class="im"><br>
> #4 : latency is calculated, using phase difference between input and output<br>
> #5 : in the terminal, the latency is printed in msec.<br>
> It never worked on my soundcard, "signal below threshold"<br>
<br>
</div>yes, because jdelay is sending a signal out of the soundcard expecting<br>
it to come back, but you have not connected it so that it can.<br>
</blockquote></div><br></div>