Path: utzoo!utgpu!news-server.csri.toronto.edu!turing.toronto.edu!west
Newsgroups: comp.sys.mac.programmer
From: west@turing.toronto.edu (Tom West)
Subject: Problem with Sound Manager
Message-ID: <1990Dec6.120506.11284@jarvis.csri.toronto.edu>
Organization: CSRI, University of Toronto
Date: 6 Dec 90 17:05:07 GMT
Lines: 39


  I have a problem with the Sound Manager.  I can make it do ordinal notes 
without any problem.  However, when I try and make it play a frequency, it 
play nothing. 

	The following code plays nothing:

/* Play Middle A (440Hz) for 1 second */
    SoundChannelPtr channel = NIL;
    SndCommand cmd;

    cmd.cmd = noteCmd;
    cmd.param1 = 2000;
    cmd.param2 = 0xFF000000 + (440 * 256);

    (void) SndNewChannel (&channel, noteSynth, 0, (SndCallBackProcPtr) NULL);
    (void) SndDoCommand (channel, &cmd, false);
    (void) SndDisposeChannel (channel, false);

	But the following commands plays a note:

/* Play Middle C for 1 second) */
    SoundChannelPtr channel = NIL;
    SndCommand cmd;

    cmd.cmd = noteCmd;
    cmd.param1 = 2000;
    cmd.param2 = 0xFF000000 + 60;

    (void) SndNewChannel (&channel, noteSynth, 0, (SndCallBackProcPtr) NULL);
    (void) SndDoCommand (channel, &cmd, false);
    (void) SndDisposeChannel (channel, false);

Any advice or help would be greatly appreciated. Thanks in advance.

					Tom West
				    west@turing.toronto.edu
				    tomwest@gpu.utcs.utoronto.ca
				    west@hsa.on.ca