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<TITLE>RMS</TITLE>
<CENTER><A NAME="rms"></A>
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<H2>
rms, gain, balance</H2>
<PRE> kr <B>rms</B> asig[, ihp, istor]
nr <B>gain</B> asig, krms[, ihp, istor]
ar <B>balance</B> asig, acomp[, ihp, istor]</PRE>
<HR>
<H4>
<U>DESCRIPTION</U></H4>
The rms power of asig can be interrogated, set, or adjusted to match that
of a comparator signal.
<H3>
INlTlALIZATlON</H3>
<I>ihp</I> (optional) - half-power point (in cps) of a special internal
low-pass filter. The default value is 10.
<P><I>istor</I> (optional) - initial disposition of internal data space
( <A HREF="./port.html">see reson</A>). The default value is 0.
<H4>
<U>PERFORMANCE</U></H4>
rms output values kr will trace the <B>rms</B> value of the audio input
<I>asig</I>. This unit is not a signal modifier, but functions rather as
a signal power-guage.
<P>gain provides an amplitude modification of <I>asig</I> so that the output
<I>ar</I> has <B>rms</B> power equal to <I>krms</I>. <B>rms</B> and <B>gain</B>
used together (and given matching <I>ihp</I> values) will provide the same
effect as <B>balance</B>.
<P><B>balance</B> outputs a version of <I>asig</I>, amplitude-modified
so that its rms power is equal to that of a comparator signal <I>acomp</I>.
Thus a signal that has suffered loss of power (eg., in passing through
a filter bank) can be restored by matching it with, for instance, its own
source. It should be noted that <B>gain</B> and <B>balance</B> provide
amplitude modification only - output signals are not altered in any other
respect.
<H4>
<U>EXAMPLE:</U></H4>
<PRE> asrc <B>buzz</B> 10000,440, sr/440, 1 ; band-limited pulse train
a1 <B>reson</B> asrc, 1000,100 ; sent through
a2 <B>reson</B> a1,3000,500 ; 2 filters
afin <B>balance</B> a2, asrc ; then balanced with source</PRE>
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