Summary:	ASTERISK-00740: [patch] Generation of tones that have one tone amplitude modulated by another
Reporter:	Steve Davies . (stevedavies)	Labels:
Date Opened:	2004-01-05 07:26:15.000-0600	Date Closed:	2008-01-15 14:39:48.000-0600
Priority:	Major	Regression?	No
Status:	Closed/Complete	Components:	Core/General
Versions:		Frequency of Occurrence
Related Issues:
Environment:		Attachments:	( 0) asterisk-patch-sld-20040105-modulatedindications.patch
Description:	Currently Asterisk's tone generator can generate tones consisting of two tones added together. But some countries use tones that consist of one higher frequency tone amplitude modulated with a second lower frequency. Examples are Australia where ringing is 400Hz modulated with a 33Hz "warble".  In Australia, also, dialtone is 425Hz modulated with 25Hz. South Africa uses similar (though not identical) tones. This patch extends the "freq1+freq2" syntax used in indications.conf and elsewhere to mean "mix the two tones" with "freq1*freq2" to mean modulate the one with the other.  + and * map well to the actual arithmetical operations.
Comments:	By: Olle Johansson (oej) 2004-01-06 15:50:04.000-0600 Move to category "configuration error" By: Malcolm Davenport (mdavenport) 2004-01-07 19:33:50.000-0600 Hi Steve.  Can we get a disclaimer for this? By: Malcolm Davenport (mdavenport) 2004-01-08 10:06:40.000-0600 Added to CVS. By: Digium Subversion (svnbot) 2008-01-15 14:39:48.000-0600 Repository: asterisk Revision: 1902 U   trunk/indications.c ------------------------------------------------------------------------ r1902 | malcolmd | 2008-01-15 14:39:47 -0600 (Tue, 15 Jan 2008) | 2 lines Fix to generate tones having one amplitude modulated by another: Bug ASTERISK-740 ------------------------------------------------------------------------ http://svn.digium.com/view/asterisk?view=rev&revision=1902