http://wiki.rivendellaudio.org/index.php?action=history&feed=atom&title=Jack_frame%2C_period%2C_buffer_infoJack frame, period, buffer info - Revision history2026-05-01T22:13:09ZRevision history for this page on the wikiMediaWiki 1.26.4http://wiki.rivendellaudio.org/index.php?title=Jack_frame,_period,_buffer_info&diff=138&oldid=prevHiggles: Created page with "Date: Wed, 15 Aug 2007 19:33:02 +0200<BR> Subject: Re: [Jackit-devel] Meant of periods and frames<BR> To: jackit-devel@lists.sourceforge.net<BR> <PRE> On Wednesday 15 August..."2018-03-12T16:24:40Z<p>Created page with "Date: Wed, 15 Aug 2007 19:33:02 +0200<BR> Subject: Re: [Jackit-devel] Meant of periods and frames<BR> To: jackit-devel@lists.sourceforge.net<BR> <PRE> On Wednesday 15 August..."</p>
<p><b>New page</b></p><div>Date: Wed, 15 Aug 2007 19:33:02 +0200<BR><br />
Subject: Re: [Jackit-devel] Meant of periods and frames<BR><br />
To: jackit-devel@lists.sourceforge.net<BR><br />
<br />
<PRE><br />
On Wednesday 15 August 2007, zappa wrote:<br />
> Hi people,<br />
> i'm a new user of jack at all, i'm italian => i don't speak english...<br />
><br />
> the question:<br />
> I don't understand what is the FRAMES/PERIOD and the PERIODS/BUFFER,<br />
> the definition in the man page of jackd is confused for me.<br />
> If possible i would want a theorist definition of it.<br />
> Example:<br />
> the sample rate is the frequency of sampling, the amount of samples take<br />
><br />
> >from the input;<br />
><br />
> frames/period and periods/buffer what is practically?<br />
><br />
> Sorry for my english...I hope is understood my problem<br />
><br />
> ciao<br />
<br />
A frame of audio means 1 sample per channel.. E.g. if you have a 6-channel<br />
signal and you process one frame of it you have processed one sample per<br />
channel, 6 samples in total..<br />
<br />
frames/period means frames per processing cycle (e.g. if you have 64<br />
frames/period, then the buffersize per channel is 64 samples)<br />
<br />
periods/buffer means how many periods are there [on windows a period is more<br />
often called a "buffer"]. But in a typical double buffer scheme you have e.g.<br />
two buffers combined into a single chunk of memory.. And in alsa speak, this<br />
combined buffer is the "buffer" and the individual chunks in the buffers are<br />
called periods [kinda, the terminology is a little squishy] So one period is<br />
the first half of the buffer and the other period is the second half of the<br />
buffer..<br />
<br />
Flo<br />
</PRE></div>Higgles