avatar

robertsonics

Member Since: March 15, 2006

Country: United States

Profile

robertsonics

MP3 Trigger Hookup Guide V24

January 21, 2016

Incorporate sound into your next project easily with the MP3 Trigger.
  • I am unable to duplicate your issue - it seems to work correctly for me. With re-trigger disabled, I’ve not been able to get it to restart while the track is playing. What’s “a while”? Are you using the most recent firmware version?

  • This is the first I’ve heard of this - thanks for reporting it. I’ll have a look to see if I can recreate and get to the bottom of it.

  • The WAV Trigger’s cpu operates at 3.3V but all of the inputs, including the UART RX, are 5V tolerant. Hope this helps.

  • Please review this tutorial.

  • Yes, that’s true, although I’m surprised to hear that some tracks don’t play at all. I thought I had tested that pretty carefully. It’s a great suggestion, and one that’s been on the list for some time. Coming up with a different seed each power cycle probably means implementing an ADC to read a “random” analog value. I’m working on other things at the moment so it may take me a bit.

    In the meantime, may I suggest that a Teensy, the WAV Trigger Serial Control Library and a little code would give you the ability to have any random functionality you care to create. The library allows you to easily start any track on the microSD card, and you can use the WAV Trigger Play Output (PLO) pin to determine when tracks are finished.

  • That’s just under 1GB. Shouldn’t be a problem.

  • Just want to point out that the WAV Trigger now supports 2048 tracks, not 999. That’s 16 complete banks of 128 MIDI note numbers.

  • There’s also an Arduino serial control library for the WAV Trigger with an example using the Uno here

  • There’s a whole bunch of things that the WAV Trigger can do that the MP3 Trigger can’t, the main things being polyphony, CD quality, uncompressed audio and MIDI. The only thing the MP3 Trigger can do that the WAV Trigger can’t is play MP3 files, but you can easily convert any MP3 to wav. I don’t know why you wouldn’t use the WAV Trigger.

  • You may be able accomplish this without an Arduino. You can program a trigger input to provide the Random function over a range of tracks. Then using the trigger type selection (edge or latched), you can program the desired behavior of the trigger (press once to start continuous random play vs having to press again to play the next selection.) This is all built into the WAV Trigger.

    Once caveat is that the Random track selection is actually pseudo random - meaning that it’s a random sequence of the tracks, but it will be the same random sequence after each power cycle.

No public wish lists :(