Random Trigger Function for the MP3 Trigger

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Here’s an alternate version of the latest firmware for the MP3 Trigger that changes the behavior of TRIG17 and TRIG18. In this version:

TRIG17 is a sequential trigger. It will loop through all of the tracks on the flash card, one track per activation. (Same as the “Forward” navigation switch function.)

TRIG18 is a random trigger. It will play a random track from the flash card, one track per activation.

Here’s one example of how a combination of jumpering and buttons can be used to good effect: Let’s say that TRACK001.MP3 is background music, and all the other tracks are spoken messages. If you jumper TRIG01 and put a button on TRIG18, then as soon as the MP3 Trigger is powered up it will start looping the background music. Every time the button is pushed, you’ll get a random spoken message after which it will go back to looping the background music. (You could also do this with the button on TRIG17, in which case the spoken messages will cycle through in a particular order.)

UPDATE: If you grabbed this version before 8/21/2010 please reprogram your unit with this file. There was a bug in the random track generator algorithm that made it not work properly when there were only one or two tracks on your flash card. All fixed now. Sorry for any inconvenience.

MP3 Trigger V2 Firmware v2.23r 2400 baud
MP3 Trigger V2 Firmware v2.23r 9600 baud
MP3 Trigger V2 Firmware v2.23r 38.4k baud

This version is the same as the latest v2.23 in all other regards.

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