From 1498e89f88d0a090a59ceb4cf19daf9d9c8963c5 Mon Sep 17 00:00:00 2001
From: Miller Puckette <millerpuckette@users.sourceforge.net>
Date: Sat, 31 Dec 2005 02:56:03 +0000
Subject: re-synced with my own source tree...

svn path=/trunk/; revision=4321
---
 pd/doc/5.reference/acoustics-help.pd | 53 ++++++++++++++++++++----------------
 1 file changed, 30 insertions(+), 23 deletions(-)

(limited to 'pd/doc/5.reference')

diff --git a/pd/doc/5.reference/acoustics-help.pd b/pd/doc/5.reference/acoustics-help.pd
index 2a46f589..de3e6f22 100644
--- a/pd/doc/5.reference/acoustics-help.pd
+++ b/pd/doc/5.reference/acoustics-help.pd
@@ -1,40 +1,47 @@
-#N canvas 163 25 582 408 12;
-#X obj 15 269 ftom;
+#N canvas 0 466 571 483 12;
+#X obj 32 393 ftom;
 #X obj 8 10 mtof;
-#X obj 15 217 mtof;
-#X floatatom 15 189 0 0 0;
-#X floatatom 15 244 0 0 0;
+#X obj 32 341 mtof;
+#X floatatom 32 313 0 0 0 0 - - -;
+#X floatatom 32 368 0 0 0 0 - - -;
 #X obj 64 10 ftom;
-#X floatatom 15 293 0 0 0;
+#X floatatom 32 417 0 0 0 0 - - -;
 #X obj 120 11 dbtorms;
 #X obj 196 11 rmstodb;
 #X obj 275 11 dbtopow;
 #X obj 352 11 powtodb;
+#X floatatom 164 309 0 0 0 0 - - -;
+#X floatatom 164 364 0 0 0 0 - - -;
+#X floatatom 164 413 0 0 0 0 - - -;
+#X obj 164 337 dbtorms;
+#X obj 164 389 rmstodb;
+#X floatatom 278 310 0 0 0 0 - - -;
+#X floatatom 278 365 0 0 0 0 - - -;
+#X floatatom 278 414 0 0 0 0 - - -;
+#X obj 278 338 dbtopow;
+#X obj 278 390 powtodb;
+#X text 23 245 Finally \, dbtopow and powtodb convert decibels to and
+from power units \, equal to the square of the "RMS" amplitude.;
+#X text 304 448 updated for pd version 0.40.;
 #X text 21 53 The mtof object transposes a midi value into a frequency
 in Hertz \, so that "69" goes to "440". You can specify microtonal
 pitches as in "69.5" (a quarter tone higher than 69). Ftom does the
-reverse.;
-#X floatatom 147 185 0 0 0;
-#X floatatom 147 240 0 0 0;
-#X floatatom 147 289 0 0 0;
-#X obj 147 213 dbtorms;
-#X obj 147 265 rmstodb;
-#X floatatom 261 186 0 0 0;
-#X floatatom 261 241 0 0 0;
-#X floatatom 261 290 0 0 0;
-#X obj 261 214 dbtopow;
-#X obj 261 266 powtodb;
-#X text 27 336 Overflows and underflows are clipped.;
-#X text 300 376 updated for pd version 0.33;
+reverse. A frequency of zero Hertz is given a MIDI value of -1500 (strictly
+speaking \, it is negative infinity.);
+#X text 22 149 The dbtorms and rmstodb objects convert from decibels
+to linear ("RMS") amplitude \, so that 100 dB corresponds to an "RMS"
+of 1 Zero amplitude (strictly speaking \, minus infinity dB) is clipped
+to zero dB \, and zero dB \, which should correspond to 1e-04 in "RMS"
+\, is instead rounded down to zero.;
 #X connect 0 0 6 0;
 #X connect 2 0 4 0;
 #X connect 3 0 2 0;
 #X connect 4 0 0 0;
+#X connect 11 0 14 0;
 #X connect 12 0 15 0;
-#X connect 13 0 16 0;
+#X connect 14 0 12 0;
 #X connect 15 0 13 0;
-#X connect 16 0 14 0;
+#X connect 16 0 19 0;
 #X connect 17 0 20 0;
-#X connect 18 0 21 0;
+#X connect 19 0 17 0;
 #X connect 20 0 18 0;
-#X connect 21 0 19 0;
-- 
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