BackMute is based on TaleMute.
Users with TaleDevices may prefer to use TaleMute or the auto-detect enhanced
AutoTaleMute.
Like TaleMute and AutoTaleMute, BackMute will intercept the alarms generated by the new Datebook application (OS 3.0 and later), as well as the alarms generated by the Pager Card.
BackMute is distributed as Freeware. You may run this program without restriction, however you may not distribute it for profit.
BackMute requires a PalmOS device that supports backlight.
BackMute is compatible with all released versions of the OS through 3.2, and all PalmOS devices that support backlight including the new Palm IIIx, Palm V and Palm VII.
When it is active, BackMute patches two operating system calls that applications might use to play sounds: SndDoCmd and SndPlaySmf. When either of these routines is called, BackMute intercepts the call, mutes the audio and inverts the backlight for the duration of the sound.
Note: by design, BackMute does not intercept the playing of system sounds, such as the clicks and beeps that are played in response to user-interface activities.
BackMute attempts to match the duration of the sound. Thus, you can adjust the amount of time that the backlight is inverted by selecting a sound that has a shorter or longer duration.
Download BackMute in .sit format.
The latest version of BackMute can be found at: http://www.cs.cmu.edu/~pane/bm/
v1.2: Work around a problem on the Palm IIIx where the sound did not mute properly, and correct some bugs in the behavior when the backlight is already on.
v1.1: Initial public release.
JPSoftware@pane.net (last modified on 990629)